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Message-ID: <1623596874.1474801283008793181.JavaMail.root@zmail06.collab.prod.int.phx2.redhat.com> Date: Sat, 28 Aug 2010 11:19:53 -0400 (EDT) From: caiqian@...hat.com To: linux-next@...r.kernel.org Cc: linux-kernel <linux-kernel@...r.kernel.org>, kexec <kexec@...ts.infradead.org> Subject: Re: kdump regression compared to v2.6.35 Hmm, after bisect the mainline, it pointed to a wrong commit earlier than v2.6.35, since we knew that v2.6.35 was working fine and v2.6.36-rc1 was broken. Here was the log starting from HEAD (bad) and v2.6.35 (good). I noticed that we got this too, # git bisect good Bisecting: a merge base must be tested [21aa9af03d06cb1d19a3738e5cf12acff984e69b] sched: add hooks for workqueue # git bisect log git bisect start # good: [ab69bcd66fb4be64edfc767365cb9eb084961246] Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6 git bisect good ab69bcd66fb4be64edfc767365cb9eb084961246 # good: [1cfd2bda8c486ae0e7a8005354758ebb68172bca] Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6 git bisect good 1cfd2bda8c486ae0e7a8005354758ebb68172bca # bad: [faa38b5e0e092914764cdba9f83d31a3f794d182] Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6 git bisect bad faa38b5e0e092914764cdba9f83d31a3f794d182 # bad: [5df6b8e65ad0f2eaee202ff002ac00d1ac605315] Merge branch 'nfs-for-2.6.36' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6 git bisect bad 5df6b8e65ad0f2eaee202ff002ac00d1ac605315 # bad: [1fc7995d19139d6f99203b43c161968f3f554a15] Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6 git bisect bad 1fc7995d19139d6f99203b43c161968f3f554a15 # good: [e8779776afbd5f2d5315cf48c4257ca7e9b250fb] Merge branch 'x86-mce-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip git bisect good e8779776afbd5f2d5315cf48c4257ca7e9b250fb # bad: [f34217977d717385a3e9fd7018ac39fade3964c0] workqueue: implement unbound workqueue git bisect bad f34217977d717385a3e9fd7018ac39fade3964c0 # good: [7e27d6e778cd87b6f2415515d7127eba53fe5d02] Linux 2.6.35-rc3 git bisect good 7e27d6e778cd87b6f2415515d7127eba53fe5d02 # good: [21aa9af03d06cb1d19a3738e5cf12acff984e69b] sched: add hooks for workqueue git bisect good 21aa9af03d06cb1d19a3738e5cf12acff984e69b # good: [c8e55f360210c1bc49bea5d62bc3939b7ee13483] workqueue: implement worker states git bisect good c8e55f360210c1bc49bea5d62bc3939b7ee13483 # good: [d320c03830b17af64e4547075003b1eeb274bc6c] workqueue: s/__create_workqueue()/alloc_workqueue()/, and add system workqueues git bisect good d320c03830b17af64e4547075003b1eeb274bc6c # good: [4ce48b37bfedc2bc11e61eae76784887e88b922c] workqueue: fix race condition in flush_workqueue() git bisect good 4ce48b37bfedc2bc11e61eae76784887e88b922c # good: [d313dd85ad846bc768d58e9ceb28588f917f4c9a] workqueue: fix worker management invocation without pending works git bisect good d313dd85ad846bc768d58e9ceb28588f917f4c9a # good: [bdbc5dd7de5d07d6c9d3536e598956165a031d4c] workqueue: prepare for WQ_UNBOUND implementation git bisect good bdbc5dd7de5d07d6c9d3536e598956165a031d4c Any suggestion how to track it down? ----- "CAI Qian" <caiqian@...hat.com> wrote: > Just a head-up, the kdump kernel is stuck here. Bisect indicated that > cc41f5cede3c63836d1c0958204630b07f5b5ee7 was also good. > > Kernel command line: ro root=/dev/mapper/vg_intels3e3601-lv_root > rd_LVM_LV=vg_intels3e3601/lv_root rd_LVM_LV=vg_intels3e3601/lv_swap > rd_NO_LUKS rd_NO_MD rd_NO_DM LANG=en_US.UTF-8 > SYSFONT=latarcyrheb-sun16 KEYBOARDTYPE=pc KEYTABLE=us > console=ttyS0,115200 irqpoll maxcpus=1 reset_devices > cgroup_disable=memory memmap=exactmap memmap=640K@0K > memmap=130412K@...92K elfcorehdr=180204K memmap=128K$896K > memmap=2124K#1978520K memmap=4280K#1980644K memmap=464K$1984924K > memmap=156K#1985388K memmap=84K$1985544K memmap=92K#1985628K > memmap=8K$1985720K memmap=124K#1985728K memmap=136K$1985852K > memmap=192K#1985988K memmap=260K$1986180K memmap=2816K#1986440K > memmap=176K$1989256K memmap=3028K#1989432K memmap=2048K#1992460K > memmap=2072K#1994508K memmap=8K$1996580K memmap=324K#1996588K > memmap=428K$1996912K memmap=31584K#1997340K memmap=960K$2028924K > memmap=1248K#2029884K memmap=288K#2031132K memmap=192K#2031420K > memmap=327684K$2031612K memmap=16384K$4128768K memmap=16K$4174960K > memmap=16384K$4177920K > Misrouted IRQ fixup and polling support enabled > This may significantly impact system performance > Disabling memory control group subsystem > PID hash table entries: 512 (order: 0, 4096 bytes) > Checking aperture... > No AGP bridge found > Queued invalidation will be enabled to support x2apic and > Intr-remapping. > Subtract (141 early reservations) > #1 [0004000000 - 00052b1548] TEXT DATA BSS > #2 [000ab63000 - 000afef000] RAMDISK > #3 [00052b2000 - 00052b2220] BRK > #4 [000009b000 - 00000fdd20] BIOS reserved > #5 [00000fdd30 - 0000100000] BIOS reserved > #6 [00000fdd20 - 00000fdd30] MP-table mpf > #7 [0000000012 - 000000f012] MP-table mpc > #8 [0000010000 - 0000012000] TRAMPOLINE > #9 [0000012000 - 0000016000] ACPI WAKEUP > #10 [0000016000 - 0000017000] PGTABLE > #11 [0000017000 - 000001703c] ACPI SLIT > #12 [000000f040 - 000000f4c0] MEMNODEMAP > #13 [00030a0000 - 00030c7000] NODE_DATA > #14 [00030c7000 - 00030c8000] BOOTMEM > #15 [00034c8000 - 00034c8030] BOOTMEM > #16 [00038c9000 - 00038ca000] BOOTMEM > #17 [00038ca000 - 00038cb000] BOOTMEM > #18 [0003a00000 - 0003e00000] MEMMAP 0 > #19 [00030c8000 - 00030e0000] BOOTMEM > #20 [00030e0000 - 00030f8000] BOOTMEM > #21 [00030f8000 - 00030f9000] BOOTMEM > #22 [00030f9000 - 00030f9041] BOOTMEM > #23 [00030f9080 - 00030f9149] BOOTMEM > #24 [00030f9180 - 00030f9768] BOOTMEM > #25 [00030f9780 - 00030f97e8] BOOTMEM > #26 [00030f9800 - 00030f9868] BOOTMEM > #27 [00030f9880 - 00030f98e8] BOOTMEM > #28 [00030f9900 - 00030f9968] BOOTMEM > #29 [00030f9980 - 00030f99e8] BOOTMEM > #30 [00030f9a00 - 00030f9a68] BOOTMEM > #31 [00030f9a80 - 00030f9ae8] BOOTMEM > #32 [00030f9b00 - 00030f9b68] BOOTMEM > #33 [00030f9b80 - 00030f9be8] BOOTMEM > #34 [00030f9c00 - 00030f9c68] BOOTMEM > #35 [00030f9c80 - 00030f9ce8] BOOTMEM > #36 [00030f9d00 - 00030f9d68] BOOTMEM > #37 [00030f9d80 - 00030f9de8] BOOTMEM > #38 [00030f9e00 - 00030f9e68] BOOTMEM > #39 [00030f9e80 - 00030f9ee8] BOOTMEM > #40 [00030f9f00 - 00030f9f68] BOOTMEM > #41 [00030f9f80 - 00030f9fe8] BOOTMEM > #42 [00030fa000 - 00030fa068] BOOTMEM > #43 [00030fa080 - 00030fa0e8] BOOTMEM > #44 [00030fa100 - 00030fa168] BOOTMEM > #45 [00030fa180 - 00030fa1e8] BOOTMEM > #46 [00030fa200 - 00030fa268] BOOTMEM > #47 [00030fa280 - 00030fa2e8] BOOTMEM > #48 [00030fa300 - 00030fa368] BOOTMEM > #49 [00030fa380 - 00030fa3e8] BOOTMEM > #50 [00030fa400 - 00030fa468] BOOTMEM > #51 [00030fa480 - 00030fa4e8] BOOTMEM > #52 [00030fa500 - 00030fa568] BOOTMEM > #53 [00030fa580 - 00030fa5e8] BOOTMEM > #54 [00030fa600 - 00030fa668] BOOTMEM > #55 [00030fa680 - 00030fa6e8] BOOTMEM > #56 [00030fa700 - 00030fa768] BOOTMEM > #57 [00030fa780 - 00030fa7e8] BOOTMEM > #58 [00030fa800 - 00030fa820] BOOTMEM > #59 [00030fa840 - 00030fac0e] BOOTMEM > #60 [00030fac40 - 00030fb00e] BOOTMEM > #61 [0005400000 - 000541e000] BOOTMEM > #62 [0005420000 - 000543e000] BOOTMEM > #63 [0005440000 - 000545e000] BOOTMEM > #64 [0005460000 - 000547e000] BOOTMEM > #65 [0005480000 - 000549e000] BOOTMEM > #66 [00054a0000 - 00054be000] BOOTMEM > #67 [00054c0000 - 00054de000] BOOTMEM > #68 [00054e0000 - 00054fe000] BOOTMEM > #69 [0005500000 - 000551e000] BOOTMEM > #70 [0005520000 - 000553e000] BOOTMEM > #71 [0005540000 - 000555e000] BOOTMEM > #72 [0005560000 - 000557e000] BOOTMEM > #73 [0005580000 - 000559e000] BOOTMEM > #74 [00055a0000 - 00055be000] BOOTMEM > #75 [00055c0000 - 00055de000] BOOTMEM > #76 [00055e0000 - 00055fe000] BOOTMEM > #77 [0005600000 - 000561e000] BOOTMEM > #78 [0005620000 - 000563e000] BOOTMEM > #79 [0005640000 - 000565e000] BOOTMEM > #80 [0005660000 - 000567e000] BOOTMEM > #81 [0005680000 - 000569e000] BOOTMEM > #82 [00056a0000 - 00056be000] BOOTMEM > #83 [00056c0000 - 00056de000] BOOTMEM > #84 [00056e0000 - 00056fe000] BOOTMEM > #85 [0005700000 - 000571e000] BOOTMEM > #86 [0005720000 - 000573e000] BOOTMEM > #87 [0005740000 - 000575e000] BOOTMEM > #88 [0005760000 - 000577e000] BOOTMEM > #89 [0005780000 - 000579e000] BOOTMEM > #90 [00057a0000 - 00057be000] BOOTMEM > #91 [00057c0000 - 00057de000] BOOTMEM > #92 [00057e0000 - 00057fe000] BOOTMEM > #93 [0005800000 - 000581e000] BOOTMEM > #94 [0005820000 - 000583e000] BOOTMEM > #95 [0005840000 - 000585e000] BOOTMEM > #96 [0005860000 - 000587e000] BOOTMEM > #97 [0005880000 - 000589e000] BOOTMEM > #98 [00058a0000 - 00058be000] BOOTMEM > #99 [00058c0000 - 00058de000] BOOTMEM > #100 [00058e0000 - 00058fe000] BOOTMEM > #101 [0005900000 - 000591e000] BOOTMEM > #102 [0005920000 - 000593e000] BOOTMEM > #103 [0005940000 - 000595e000] BOOTMEM > #104 [0005960000 - 000597e000] BOOTMEM > #105 [0005980000 - 000599e000] BOOTMEM > #106 [00059a0000 - 00059be000] BOOTMEM > #107 [00059c0000 - 00059de000] BOOTMEM > #108 [00059e0000 - 00059fe000] BOOTMEM > #109 [0005a00000 - 0005a1e000] BOOTMEM > #110 [0005a20000 - 0005a3e000] BOOTMEM > #111 [0005a40000 - 0005a5e000] BOOTMEM > #112 [0005a60000 - 0005a7e000] BOOTMEM > #113 [0005a80000 - 0005a9e000] BOOTMEM > #114 [0005aa0000 - 0005abe000] BOOTMEM > #115 [0005ac0000 - 0005ade000] BOOTMEM > #116 [0005ae0000 - 0005afe000] BOOTMEM > #117 [0005b00000 - 0005b1e000] BOOTMEM > #118 [0005b20000 - 0005b3e000] BOOTMEM > #119 [0005b40000 - 0005b5e000] BOOTMEM > #120 [0005b60000 - 0005b7e000] BOOTMEM > #121 [0005b80000 - 0005b9e000] BOOTMEM > #122 [0005ba0000 - 0005bbe000] BOOTMEM > #123 [0005bc0000 - 0005bde000] BOOTMEM > #124 [0005be0000 - 0005bfe000] BOOTMEM > #125 [00030fd040 - 00030fd048] BOOTMEM > #126 [00030fd080 - 00030fd088] BOOTMEM > #127 [00030fd0c0 - 00030fd1c0] BOOTMEM > #128 [00030fd1c0 - 00030fd3c0] BOOTMEM > #129 [00030fd3c0 - 00030fd4d0] BOOTMEM > #130 [00030fd500 - 00030fd548] BOOTMEM > #131 [00030fd580 - 00030fd5c8] BOOTMEM > #132 [00030fb040 - 00030fb240] BOOTMEM > #133 [00030fb240 - 00030fb440] BOOTMEM > #134 [00030fb440 - 00030fb640] BOOTMEM > #135 [00030fb640 - 00030fb840] BOOTMEM > #136 [00030fb840 - 00030fba40] BOOTMEM > #137 [00030fba40 - 00030fbc40] BOOTMEM > #138 [00030fbc40 - 00030fbe40] BOOTMEM > #139 [00030fbe40 - 00030fc040] BOOTMEM > #140 [00030fc040 - 00030fd040] BOOTMEM > Memory: 94968k/180204k available (4766k kernel code, 49156k absent, > 36080k reserved, 7642k data, 1448k init) > Hierarchical RCU implementation. > RCU-based detection of stalled CPUs is disabled. > Verbose stalled-CPUs detection is disabled. > NR_IRQS:262400 nr_irqs:2008 > Extended CMOS year: 2000 > Spurious LAPIC timer interrupt on cpu 0 > Console: colour VGA+ 80x25 > console [ttyS0] enabled > Fast TSC calibration using PIT > Detected 1994.798 MHz processor. > Calibrating delay loop (skipped), value calculated using timer > frequency.. 3989.59 BogoMIPS (lpj=1994798) > pid_max: default: 65536 minimum: 512 > Security Framework initialized > SELinux: Initializing. > Dentry cache hash table entries: 16384 (order: 5, 131072 bytes) > Inode-cache hash table entries: 8192 (order: 4, 65536 bytes) > Mount-cache hash table entries: 256 > Initializing cgroup subsys ns > Initializing cgroup subsys cpuacct > Initializing cgroup subsys memory > Initializing cgroup subsys devices > Initializing cgroup subsys freezer > Initializing cgroup subsys net_cls > Initializing cgroup subsys blkio > CPU: Physical Processor ID: 3 > CPU: Processor Core ID: 0 > mce: CPU supports 22 MCE banks > using mwait in idle threads. > Performance Events: PEBS fmt1+, Nehalem events, Intel PMU driver. > ... version: 3 > ... bit width: 48 > ... generic registers: 4 > ... value mask: 0000ffffffffffff > ... max period: 000000007fffffff > ... fixed-purpose events: 3 > ... event mask: 000000070000000f > SMP alternatives: switching to UP code > ACPI: Core revision 20100702 > ftrace: converting mcount calls to 0f 1f 44 00 00 > ftrace: allocating 18514 entries in 73 pages > DMAR: Host address width 48 > DMAR: DRHD base: 0x000000fd800000 flags: 0x0 > IOMMU 0: reg_base_addr fd800000 ver 1:0 cap c90780106f0462 ecap f020fe > DMAR: DRHD base: 0x000000fd000000 flags: 0x1 > IOMMU 1: reg_base_addr fd000000 ver 1:0 cap c90780106f0462 ecap f020fe > DMAR: RMRR base: 0x0000007be29000 end: 0x0000007be2bfff > DMAR: RMRR base: 0x0000007be16000 end: 0x0000007be16fff > DMAR: RMRR base: 0x0000007be13000 end: 0x0000007be13fff > DMAR: RMRR base: 0x0000007be10000 end: 0x0000007be10fff > DMAR: RMRR base: 0x0000007be0d000 end: 0x0000007be0dfff > DMAR: RMRR base: 0x0000007be0a000 end: 0x0000007be0afff > DMAR: RMRR base: 0x0000007be07000 end: 0x0000007be07fff > DMAR: RMRR base: 0x0000007be04000 end: 0x0000007be04fff > DMAR: RMRR base: 0x0000007be01000 end: 0x0000007be01fff > DMAR: ATSR flags: 0x0 > DMAR: ATSR flags: 0x0 > DMAR: RHSA base: 0x000000fd000000 proximity domain: 0x0 > DMAR: RHSA base: 0x000000fd800000 proximity domain: 0x2 > IOAPIC id 10 under DRHD base 0xfd800000 IOMMU 0 > IOAPIC id 8 under DRHD base 0xfd000000 IOMMU 1 > IOAPIC id 9 under DRHD base 0xfd000000 IOMMU 1 > Enabled Interrupt-remapping > Setting APIC routing to cluster x2apic > ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1 > CPU0: Intel(R) Xeon(R) CPU X7550 @ 2.00GHz stepping 06 > Brought up 1 CPUs > Total of 1 processors activated (3989.59 BogoMIPS). > devtmpfs: initialized > regulator: core version 0.5 > NET: Registered protocol family 16 > ACPI FADT declares the system doesn't support PCIe ASPM, so disable it > ACPI: bus type pci registered > PCI: MMCONFIG for domain 0000 [bus 00-ff] at [mem > 0x80000000-0x8fffffff] (base 0x80000000) > PCI: MMCONFIG at [mem 0x80000000-0x8fffffff] reserved in E820 > PCI: Using configuration type 1 for base access > bio: create slab <bio-0> at 0 -- 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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