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Date: Thu, 2 Oct 2008 10:43:18 -0700 From: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com> To: Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca> Cc: Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org, akpm@...ux-foundation.org, laijs@...fujitsu.com, manfred@...orfullife.com, dipankar@...ibm.com, niv@...ibm.com, dvhltc@...ibm.com, josht@...ux.vnet.ibm.com Subject: Re: [PATCH,RFC] RCU-based detection of stalled CPUs for Classic RCU On Thu, Oct 02, 2008 at 11:10:46AM -0400, Mathieu Desnoyers wrote: > * Paul E. McKenney (paulmck@...ux.vnet.ibm.com) wrote: > > On Thu, Oct 02, 2008 at 10:07:26AM +0200, Ingo Molnar wrote: > > > > > > * Paul E. McKenney <paulmck@...ux.vnet.ibm.com> wrote: > > > > > > > Hello! > > > > > > > > This patch adds stalled-CPU detection to Classic RCU. This capability > > > > is enabled by a new config variable CONFIG_RCU_CPU_STALL_DETECTOR, > > > > which defaults disabled. This is a debugging feature, not something > > > > that non-kernel-hackers would be expected to care about. This feature > > > > can detect looping CPUs in !PREEMPT builds and looping CPUs with > > > > preemption disabled in PREEMPT builds. This is essentially a port of > > > > this functionality from the treercu patch. > > > > > > > > One current shortcoming: on some systems, stalls are detected during > > > > early boot, when we normally would not care about them. My thought is > > > > to add a call from late initialization to suppress stall detection > > > > until the system is well along its way to being booted, but thought I > > > > should check to see if there might already be something for this > > > > purpose. > > > > > > could you be a bit more specific, why do those warnings show up and why > > > dont we care about them? There are things like networking that > > > occasionally do an rcu_sync() and a stall could mean a bootup hang. > > > > Hmmm... > > > > Good point, I was just falling back on my old "we don't care about RCU > > stalls in boot-time code" rule from long ago. It is entirely possible > > (in fact reasonably likely) that this rule no longer applies to Linux as > > it exists today. So please see below for the console output. Not all > > systems report this stall. I have recently been running only on Power > > systems, will fire off on some x86s. My kneejerk reaction was that the > > "stall" was really due to the clock-setting operation -- RCU stalls are > > based on get_seconds(). > > > > So maybe I need to change the stall-detection code to use jiffies > > instead. > > > > Thoughts? > > > > You could possibly use get monotonic time, which should hopefully be a > bit better than its NTP-corrected alternatives. OK. I thought jiffies were monotonic (though not perfectly correlated to the passage of time). This is a warning timeout, so does not need better than a few percent accuracy, as long as time never jumps too far. But what API did you have in mind? > Also, do you have all the tools you need to poinpoint the precise source > of RCU stalls ? I haven't looked at RCU trace, but I should say adding a > new tracepoint to instrument RCU callback execution at boot time and to > trace it with LTTng is close to trivial. (actually, very early kernel > boot is not so trivial as we would have to create a small kernel module > to activate lttng tracing, but tracing the early phases of userspace > bootup is trivial given we can use the userspace API). I just dump stack, which historically worked pretty well. Could you please tell me more about what you think should be added? Thanx, Paul > Mathieu > > > > > (Currently against 2.6.27-rc8, FYI.) > > > > > > > > Thoughts? > > > > > > > > Signed-off-by: Paul E. McKenney <paulmck@...ux.vnet.ibm.com> > > > > > > i think this is a very good idea in general - often the question comes > > > up whether a hang seen in the RCU code is indeed caused by RCU or other > > > factors. Could you perhaps rebase it against tip/core/rcu ? [or > > > tip/master for convenience] > > > > Will do! > > > > Thanx, Paul > > > > ------------------------------------------------------------------------ > > Console output: search for "RCU detected CPU 5 stall" near the end. > > ------------------------------------------------------------------------ > > > > Elapsed time since release of system processors: 7742 mins 58 secs > > > > Config file read, 2048 bytes > > Welcome > > Welcome to yaboot version 1.3.13-cas (Red Hat 1.3.13.cas-5) > > Enter "help" to get some basic usage information > > boot: autobench > > Please wait, loading kernel... > > Elf64 kernel loaded... > > Loading ramdisk... > > ramdisk loaded at 02b00000, size: 2331 Kbytes > > OF stdout device is: /vdevice/vty@...00000 > > Hypertas detected, assuming LPAR ! > > -\|/-\|/-\|/-\| > > Elapsed time since release of system processors: 7743 mins 29 secs > > > > Config file read, 2048 bytes > > Welcome > > Welcome to yaboot version 1.3.13-cas (Red Hat 1.3.13.cas-5) > > Enter "help" to get some basic usage information > > boot: autobench > > Please wait, loading kernel... > > Elf64 kernel loaded... > > Loading ramdisk... > > ramdisk loaded at 02b00000, size: 2331 Kbytes > > OF stdout device is: /vdevice/vty@...00000 > > Hypertas detected, assuming LPAR ! > > command line: ro console=hvc0 autobench_args: root=/dev/sda6 > > ABAT:1222922465 > > memory layout at init: > > alloc_bottom : 0000000002d47000 > > alloc_top : 0000000008000000 > > alloc_top_hi : 0000000008000000 > > rmo_top : 0000000008000000 > > ram_top : 0000000008000000 > > Looking for displays > > instantiating rtas at 0x000000000757a000 ... done > > boot cpu hw idx 0000000000000000 > > starting cpu hw idx 0000000000000002... done > > starting cpu hw idx 0000000000000004... done > > starting cpu hw idx 0000000000000006... done > > copying OF device tree ... > > Building dt strings... > > Building dt structure... > > Device tree strings 0x0000000002f48000 -> 0x0000000002f49537 > > Device tree struct 0x0000000002f4a000 -> 0x0000000002f58000 > > Calling quiesce ... > > returning from prom_init > > Using pSeries machine description > > Using 1TB segments > > Found initrd at 0xc000000002b00000:0xc000000002d46c00 > > console [udbg0] enabled > > Partition configured for 8 cpus. > > CPU maps initialized for 2 threads per core > > Starting Linux PPC64 #1 SMP PREEMPT Thu Oct 2 00:39:54 EDT 2008 > > ----------------------------------------------------- > > ppc64_pft_size = 0x19 > > physicalMemorySize = 0x80000000 > > htab_hash_mask = 0x3ffff > > ----------------------------------------------------- > > Initializing cgroup subsys cpuset > > Linux version 2.6.27-rc7-autokern1 (root@...dro2.rchland.ibm.com) (gcc > > version 4.1.2 20071124 (Red Hat 4.1.2-42)) #1 SMP PREEMPT Thu Oct 2 > > 00:39:54 EDT 2008 > > [boot]0012 Setup Arch > > EEH: No capable adapters found > > PPC64 nvram contains 15360 bytes > > Zone PFN ranges: > > DMA 0x00000000 -> 0x00080000 > > Normal 0x00080000 -> 0x00080000 > > Movable zone start PFN for each node > > early_node_map[2] active PFN ranges > > 0: 0x00000000 -> 0x00044000 > > 1: 0x00044000 -> 0x00080000 > > [boot]0015 Setup Done > > Built 2 zonelists in Node order, mobility grouping on. Total pages: > > 517120 > > Policy zone: DMA > > Kernel command line: ro console=hvc0 autobench_args: root=/dev/sda6 > > ABAT:1222922465 > > Experimental hierarchical RCU implementation. > > RCU-based detection of stalled CPUs is enabled. > > Experimental hierarchical RCU init done. > > [boot]0020 XICS Init > > [boot]0021 XICS Done > > PID hash table entries: 4096 (order: 12, 32768 bytes) > > clocksource: timebase mult[7d0000] shift[22] registered > > Console: colour dummy device 80x25 > > console handover: boot [udbg0] -> real [hvc0] > > Dentry cache hash table entries: 262144 (order: 9, 2097152 bytes) > > Inode-cache hash table entries: 131072 (order: 8, 1048576 bytes) > > freeing bootmem node 0 > > freeing bootmem node 1 > > Memory: 2038156k/2097152k available (7200k kernel code, 58996k reserved, > > 1052k data, 513k bss, 292k init) > > SLUB: Genslabs=13, HWalign=128, Order=0-3, MinObjects=0, CPUs=8, > > Nodes=16 > > Calibrating delay loop... 915.45 BogoMIPS (lpj=1830912) > > Mount-cache hash table entries: 256 > > Initializing cgroup subsys ns > > Initializing cgroup subsys cpuacct > > Processor 1 found. > > Processor 2 found. > > Processor 3 found. > > Processor 4 found. > > Processor 5 found. > > Processor 6 found. > > Processor 7 found. > > Brought up 8 CPUs > > net_namespace: 1152 bytes > > NET: Registered protocol family 16 > > IBM eBus Device Driver > > PCI: Probing PCI hardware > > SCSI subsystem initialized > > usbcore: registered new interface driver usbfs > > usbcore: registered new interface driver hub > > usbcore: registered new device driver usb > > NET: Registered protocol family 2 > > IP route cache hash table entries: 65536 (order: 7, 524288 bytes) > > TCP established hash table entries: 262144 (order: 10, 4194304 bytes) > > TCP bind hash table entries: 65536 (order: 8, 1048576 bytes) > > TCP: Hash tables configured (established 262144 bind 65536) > > TCP reno registered > > NET: Registered protocol family 1 > > checking if image is initramfs... it is > > Freeing initrd memory: 2331k freed > > IOMMU table initialized, virtual merging enabled > > audit: initializing netlink socket (disabled) > > type=2000 audit(1222908206.468:1): initialized > > HugeTLB registered 16 MB page size, pre-allocated 0 pages > > HugeTLB registered 16 GB page size, pre-allocated 0 pages > > HugeTLB registered 64 KB page size, pre-allocated 0 pages > > Installing knfsd (copyright (C) 1996 okir@...ad.swb.de). > > msgmni has been set to 3985 > > Block layer SCSI generic (bsg) driver version 0.4 loaded (major 254) > > io scheduler noop registered > > io scheduler anticipatory registered (default) > > io scheduler deadline registered > > io scheduler cfq registered > > Generic RTC Driver v1.07 > > Serial: 8250/16550 driver4 ports, IRQ sharing disabled > > brd: module loaded > > loop: module loaded > > Intel(R) PRO/1000 Network Driver - version 7.3.20-k3-NAPI > > Copyright (c) 1999-2006 Intel Corporation. > > pcnet32.c:v1.35 21.Apr.2008 tsbogend@...ha.franken.de > > e100: Intel(R) PRO/100 Network Driver, 3.5.23-k4-NAPI > > e100: Copyright(c) 1999-2006 Intel Corporation > > console [netcon0] enabled > > netconsole: network logging started > > Uniform Multi-Platform E-IDE driver > > ipr: IBM Power RAID SCSI Device Driver version: 2.4.1 (April 24, 2007) > > ibmvscsi 30000003: SRP_VERSION: 16.a > > scsi0 : IBM POWER Virtual SCSI Adapter 1.5.8 > > ibmvscsi 30000003: partner initialization complete > > ibmvscsi 30000003: sent SRP login > > ibmvscsi 30000003: SRP_LOGIN succeeded > > ibmvscsi 30000003: host srp version: 16.a, host partition tundro1 (1), > > OS 2, max io 262144 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi 0:0:1:0: Direct-Access IBM VDASD blkdev 0001 PQ: 0 > > ANSI: 4 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi 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short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > scsi scan: INQUIRY result too short (5), using 36 > > st: Version 20080504, fixed bufsize 32768, s/g segs 256 > > Driver 'st' needs updating - please use bus_type methods > > Driver 'sd' needs updating - please use bus_type methods > > sd 0:0:1:0: [sda] 73400922 512-byte hardware sectors (37581 MB) > > sd 0:0:1:0: [sda] Write Protect is off > > sd 0:0:1:0: [sda] Write cache: disabled, read cache: disabled, doesn't > > support DPO or FUA > > sd 0:0:1:0: [sda] 73400922 512-byte hardware sectors (37581 MB) > > sd 0:0:1:0: [sda] Write Protect is off > > sd 0:0:1:0: [sda] Write cache: disabled, read cache: disabled, doesn't > > support DPO or FUA > > sda: sda1 sda2 sda3 sda4 < sda5 sda6 sda7 > > > sd 0:0:1:0: [sda] Attached SCSI disk > > Driver 'sr' needs updating - please use bus_type methods > > sd 0:0:1:0: Attached scsi generic sg0 type 0 > > Initializing USB Mass Storage driver... > > usbcore: registered new interface driver usb-storage > > USB Mass Storage support registered. > > mice: PS/2 mouse device common for all mice > > md: linear personality registered for level -1 > > md: raid0 personality registered for level 0 > > md: raid1 personality registered for level 1 > > device-mapper: ioctl: 4.14.0-ioctl (2008-04-23) initialised: > > dm-devel@...hat.com > > usbcore: registered new interface driver hiddev > > usbcore: registered new interface driver usbhid > > usbhid: v2.6:USB HID core driver > > IPv4 over IPv4 tunneling driver > > TCP cubic registered > > NET: Registered protocol family 17 > > RPC: Registered udp transport module. > > RPC: Registered tcp transport module. > > registered taskstats version 1 > > Freeing unused kernel memory: 292k freed > > Red Hat nash version 5.1.19.6 starting > > Mounting proc filesystem > > Mounting sysfs filesystem > > Creating /dev > > Creating initial device nodes > > Setting up hotplug. > > Creating block device nodes. > > Loading ehea.ko module > > IBM eHEA ethernet device driver (Release EHEA_0092) > > Scanning and configuring dmraid supported devices > > Creating root device. > > Mounting root filesystem. > > kjournald starting. Commit interval 5 seconds > > EXT3-fs: mounted filesystem with ordered data mode. > > Setting up other filesystems. > > Setting up new root fs > > no fstab.sys, mounting internal defaults > > Switching to new root and running init. > > unmounting old /dev > > unmounting old /proc > > unmounting old /sys > > INIT: version 2.86 booting > > Welcome to Red Hat Enterprise Linux Server > > Press 'I' to enter interactive startup. > > RCU detected CPU 5 stall (t=1222922609/2) > > Call Trace: > > [c000000042d03920] [c00000000000fdec] .show_stack+0x70/0x184 > > (unreliable) > > [c000000042d039d0] [c0000000000a1de0] .__rcu_pending+0x98/0x2ec > > [c000000042d03a70] [c0000000000a206c] .rcu_pending+0x38/0x88 > > [c000000042d03af0] [c00000000006363c] .update_process_times+0x48/0x94 > > [c000000042d03b80] [c00000000007bae4] .tick_sched_timer+0xbc/0x118 > > [c000000042d03c20] [c000000000073a88] .__run_hrtimer+0x78/0x118 > > [c000000042d03cc0] [c000000000074b3c] .hrtimer_interrupt+0x128/0x1e4 > > [c000000042d03d90] [c00000000002304c] .timer_interrupt+0xe0/0x15c > > [c000000042d03e30] [c000000000003700] decrementer_common+0x100/0x180 > > Setting clock (localtime): Thu Oct 2 00:43:30 EDT 2008 [ OK ] > > Starting udev: [ OK ] > > Setting hostname tundro2.rchland.ibm.com: [ OK ] > > No devices found > > Setting up Logical Volume Management: No volume groups found > > [ OK ] > > Checking filesystems > > Checking all file systems. > > [/sbin/fsck.ext3 (1) -- /] fsck.ext3 -a /dev/sda6 > > /dev/sda6: Superblock last mount time is in the future. FIXED. > > /dev/sda6: clean, 134758/1281696 files, 853722/2560336 blocks > > [ OK ] > > Remounting root filesystem in read-write mode: [ OK ] > > Mounting local filesystems: [ OK ] > > Enabling local filesystem quotas: quotaon: Warning: No quota format > > detected in the kernel. > > [ OK ] > > Enabling /etc/fstab swaps: swapon: /dev/sda5: Invalid argument > > [FAILED] > > INIT: Entering runlevel: 3 > > Entering non-interactive startup > > Starting boot.loadmodules: [ OK ] > > Starting background readahead: [ OK ] > > Bringing up loopback interface: [ OK ] > > Bringing up interface eth0: [ OK ] > > Starting auditd: [ OK ] > > Starting system logger: [ OK ] > > Starting kernel logger: [ OK ] > > Starting irqbalance: [ OK ] > > Starting RPC idmapd: FATAL: Module sunrpc not found. > > FATAL: Error running install command for sunrpc > > Error: RPC MTAB does not exist. > > Starting system message bus: [ OK ] > > Starting Bluetooth services:[ OK ][ OK ]Can't open RFCOMM control > > socket: Address family not supported by protocol > > > > Mounting other filesystems: [ OK ] > > Starting PC/SC smart card daemon (pcscd): [ OK ] > > Starting hidd: Can't open HIDP control socket: Address family not > > supported by protocol > > [FAILED] > > Starting autofs: Loading autofs4: [ OK ] > > Starting automount: [ OK ] > > [ OK ] > > Starting iprinit: Starting ipr initialization daemon[ OK ] > > [ OK ] > > Starting iprupdate: Checking ipr microcode levels > > Completed ipr microcode updates[ OK ] > > [ OK ] > > Starting iprdump: Starting ipr dump daemon[ OK ] > > [ OK ] > > Starting sshd: [ OK ] > > Starting cups: [ OK ] > > Starting xinetd: [ OK ] > > Starting vpdupdate: [ OK ] > > Starting console mouse services: [ OK ] > > Starting crond: [ OK ] > > Starting xfs: [ OK ] > > Starting anacron: [ OK ] > > Starting atd: [ OK ] > > Starting yum-updatesd: [ OK ] > > Starting Avahi daemon... [ OK ] > > Starting HAL daemon: [ OK ] > > Starting smartd: [ OK ] > > > > Red Hat Enterprise Linux Server release 5.2 (Tikanga) > > Kernel 2.6.27-rc7-autokern1 on an ppc64 > > > > tundro2.rchland.ibm.com login:-- 0:conmux-control -- time-stamp -- > > Oct/01/08 21:45:47 -- > > -- 0:conmux-control -- time-stamp -- Oct/01/08 22:01:03 -- > > (bot:conmon-payload) disconnected > > -- > Mathieu Desnoyers > OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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