Date:	Tue, 1 Jun 2010 11:26:03 -0400
From:	Don Zickus <dzickus@...hat.com>
To:	Jiri Slaby <jirislaby@...il.com>
Cc:	Frederic Weisbecker <fweisbec@...il.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Linux-pm mailing list <linux-pm@...ts.linux-foundation.org>,
	linux-ide@...r.kernel.org
Subject: Re: hibernation hangs with ATA errors (lockup_detector bug)

On Tue, Jun 01, 2010 at 04:46:28PM +0200, Jiri Slaby wrote:
> On 06/01/2010 03:50 PM, Don Zickus wrote:
> > On Mon, May 31, 2010 at 04:22:00PM +0200, Jiri Slaby wrote:
> >> Hi,
> >>
> >> with -next I get the following errors while trying to hibernate in
> >> qemu-kvm after the image is stored on disk:
> > 
> > Is this the host that is hibernating or the guest?
> 
> Guest.
> 
> > KVM guests don't emulate the performance counters, so the nmi piece
> > shouldn't be functioning and the soft lockup piece just sits on top of an
> > hrtimer, so off the top of my head it is hard to imagine it intefering
> > with a sata driver.
> > 
> > I'll need your whole boot up log to see how the lockup detector
> > initialized itself.
> 
> Here it goes (till the moment it dies on the ata errors):

I think I was able to reproduce over here.  I guess I didn't test the
suspend/resume path very well and the cpu transitions states aren't what I
expected.  It looks as though I might have screwed up the hrtimer stuff
and caused the box to hang when cpu1 when boots up in single cpu mode.

I'll see if I can get something out to test with later today.

Cheers,
Don

> 
> Linux version 2.6.34-mm1_64+ (ku@...lona) (gcc version 4.5.0 20100420
> [gcc-4_5-branch revision 158562] (SUSE Linux) ) #1209 SMP Thu May 27
> 22:57:37 CEST 2010
> Command line: root=/dev/sda1 resume=/dev/sdb debug no_console_suspend
> console=ttyS0,115200 console=tty0 printk.time=1 2
> BIOS-provided physical RAM map:
>  BIOS-e820: 0000000000000000 - 000000000009f000 (usable)
>  BIOS-e820: 000000000009f000 - 00000000000a0000 (reserved)
>  BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved)
>  BIOS-e820: 0000000000100000 - 000000003e7fb000 (usable)
>  BIOS-e820: 000000003e7fb000 - 000000003e800000 (reserved)
>  BIOS-e820: 00000000fffbc000 - 0000000100000000 (reserved)
> NX (Execute Disable) protection: active
> DMI 2.4 present.
> e820 update range: 0000000000000000 - 0000000000001000 (usable) ==>
> (reserved)
> e820 remove range: 00000000000a0000 - 0000000000100000 (usable)
> No AGP bridge found
> last_pfn = 0x3e7fb max_arch_pfn = 0x400000000
> MTRR default type: write-back
> MTRR fixed ranges enabled:
>   00000-9FFFF write-back
>   A0000-BFFFF uncachable
>   C0000-FFFFF write-protect
> MTRR variable ranges enabled:
>   0 base 00E0000000 mask FFE0000000 uncachable
>   1 disabled
>   2 disabled
>   3 disabled
>   4 disabled
>   5 disabled
>   6 disabled
>   7 disabled
> PAT not supported by CPU.
> initial memory mapped : 0 - 20000000
> init_memory_mapping: 0000000000000000-000000003e7fb000
>  0000000000 - 003e600000 page 2M
>  003e600000 - 003e7fb000 page 4k
> kernel direct mapping tables up to 3e7fb000 @ 8000-b000
> RAMDISK: 3df2f000 - 3e7f0000
> ACPI: RSDP 00000000000f84c0 00014 (v00 BOCHS )
> ACPI: RSDT 000000003e7fde10 00034 (v01 BOCHS  BXPCRSDT 00000001 BXPC
> 00000001)
> ACPI: FACP 000000003e7ffe40 00074 (v01 BOCHS  BXPCFACP 00000001 BXPC
> 00000001)
> ACPI: DSDT 000000003e7fdfd0 01E22 (v01   BXPC   BXDSDT 00000001 INTL
> 20090123)
> ACPI: FACS 000000003e7ffe00 00040
> ACPI: SSDT 000000003e7fdf80 00044 (v01 BOCHS  BXPCSSDT 00000001 BXPC
> 00000001)
> ACPI: APIC 000000003e7fde90 0007A (v01 BOCHS  BXPCAPIC 00000001 BXPC
> 00000001)
> ACPI: HPET 000000003e7fde50 00038 (v01 BOCHS  BXPCHPET 00000001 BXPC
> 00000001)
> ACPI: Local APIC address 0xfee00000
> (8/32 early reservations) ==> bootmem [0000000000 - 003e7fb000]
>   #0 [0001000000 - 0001989354]    TEXT DATA BSS ==> [0001000000 -
> 0001989354]
>   #1 [003df2f000 - 003e7f0000]          RAMDISK ==> [003df2f000 -
> 003e7f0000]
>   #2 [000009f000 - 0000100000]    BIOS reserved ==> [000009f000 -
> 0000100000]
>   #3 [000198a000 - 000198a049]              BRK ==> [000198a000 -
> 000198a049]
>   #4 [0000001000 - 0000003000]       TRAMPOLINE ==> [0000001000 -
> 0000003000]
>   #5 [0000003000 - 0000007000]      ACPI WAKEUP ==> [0000003000 -
> 0000007000]
>   #6 [0000008000 - 0000009000]          PGTABLE ==> [0000008000 -
> 0000009000]
>   #7 [0000009000 - 0000011000]          BOOTMAP ==> [0000009000 -
> 0000011000]
>  [ffffea0000000000-ffffea0000dfffff] PMD ->
> [ffff880002200000-ffff880002ffffff] on node 0
> sizeof(struct page) = 56
> Zone PFN ranges:
>   DMA      0x00000001 -> 0x00001000
>   DMA32    0x00001000 -> 0x00100000
>   Normal   empty
> Movable zone start PFN for each node
> early_node_map[2] active PFN ranges
>     0: 0x00000001 -> 0x0000009f
>     0: 0x00000100 -> 0x0003e7fb
> On node 0 totalpages: 255897
>   DMA zone: 56 pages used for memmap
>   DMA zone: 112 pages reserved
>   DMA zone: 3830 pages, LIFO batch:0
>   DMA32 zone: 3444 pages used for memmap
>   DMA32 zone: 248455 pages, LIFO batch:31
> ACPI: PM-Timer IO Port: 0xb008
> ACPI: Local APIC address 0xfee00000
> ACPI: LAPIC (acpi_id[0x00] lapic_id[0x00] enabled)
> ACPI: LAPIC (acpi_id[0x01] lapic_id[0x01] enabled)
> ACPI: IOAPIC (id[0x02] address[0xfec00000] gsi_base[0])
> IOAPIC[0]: apic_id 2, version 17, address 0xfec00000, GSI 0-23
> ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
> ACPI: INT_SRC_OVR (bus 0 bus_irq 5 global_irq 5 high level)
> ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
> ACPI: INT_SRC_OVR (bus 0 bus_irq 10 global_irq 10 high level)
> ACPI: INT_SRC_OVR (bus 0 bus_irq 11 global_irq 11 high level)
> ACPI: IRQ0 used by override.
> ACPI: IRQ2 used by override.
> ACPI: IRQ5 used by override.
> ACPI: IRQ9 used by override.
> ACPI: IRQ10 used by override.
> ACPI: IRQ11 used by override.
> Using ACPI (MADT) for SMP configuration information
> ACPI: HPET id: 0x8086a201 base: 0xfed00000
> SMP: Allowing 2 CPUs, 0 hotplug CPUs
> nr_irqs_gsi: 40
> PM: Registered nosave memory: 000000000009f000 - 00000000000a0000
> PM: Registered nosave memory: 00000000000a0000 - 00000000000f0000
> PM: Registered nosave memory: 00000000000f0000 - 0000000000100000
> Allocating PCI resources starting at 3e800000 (gap: 3e800000:c17bc000)
> setup_percpu: NR_CPUS:4 nr_cpumask_bits:4 nr_cpu_ids:2 nr_node_ids:1
> PERCPU: Embedded 26 pages/cpu @ffff880001a00000 s76352 r8192 d21952 u1048576
> pcpu-alloc: s76352 r8192 d21952 u1048576 alloc=1*2097152
> pcpu-alloc: [0] 0 1
> Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 252285
> Kernel command line: root=/dev/sda1 resume=/dev/sdb debug
> no_console_suspend console=ttyS0,115200 console=tty0 printk.time=1 2
> PID hash table entries: 4096 (order: 3, 32768 bytes)
> Dentry cache hash table entries: 131072 (order: 8, 1048576 bytes)
> Inode-cache hash table entries: 65536 (order: 7, 524288 bytes)
> Checking aperture...
> No AGP bridge found
> Memory: 988644k/1023980k available (5634k kernel code, 392k absent,
> 34944k reserved, 3013k data, 424k init)
> SLUB: Genslabs=13, HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=1
> Hierarchical RCU implementation.
>  RCU-based detection of stalled CPUs is disabled.
>  Verbose stalled-CPUs detection is disabled.
> NR_IRQS:4352 nr_irqs:512
> Console: colour VGA+ 80x25
> console [tty0] enabled
> console [ttyS0] enabled
> allocated 10485760 bytes of page_cgroup
> please try 'cgroup_disable=memory' option if you don't want memory cgroups
> hpet clockevent registered
> Fast TSC calibration using PIT
> Detected 2990.792 MHz processor.
> Calibrating delay loop (skipped), value calculated using timer
> frequency.. 5981.58 BogoMIPS (lpj=11963168)
> pid_max: default: 32768 minimum: 301
> Mount-cache hash table entries: 256
> Initializing cgroup subsys debug
> Initializing cgroup subsys ns
> Initializing cgroup subsys cpuacct
> Initializing cgroup subsys memory
> Initializing cgroup subsys devices
> Initializing cgroup subsys freezer
> mce: CPU supports 10 MCE banks
> Performance Events: unsupported p6 CPU model 2 no PMU driver, software
> events only.
> ACPI: Core revision 20100428
> Setting APIC routing to flat
> ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1
> CPU0: Intel QEMU Virtual CPU version 0.12.3 stepping 03
> NMI watchdog failed to create perf event on cpu0: ffffffffffffffed
> Booting Node   0, Processors  #1 Ok.
> NMI watchdog failed to create perf event on cpu1: ffffffffffffffed
> Brought up 2 CPUs
> Total of 2 processors activated (11949.21 BogoMIPS).
> devtmpfs: initialized
> NET: Registered protocol family 16
> ACPI: bus type pci registered
> PCI: Using configuration type 1 for base access
> mtrr: your CPUs had inconsistent variable MTRR settings
> mtrr: your CPUs had inconsistent MTRRdefType settings
> mtrr: probably your BIOS does not setup all CPUs.
> mtrr: corrected configuration.
> bio: create slab <bio-0> at 0
> ACPI: EC: Look up EC in DSDT
> ACPI: Interpreter enabled
> ACPI: (supports S0 S3 S4 S5)
> ACPI: Using IOAPIC for interrupt routing
> ACPI: No dock devices found.
> PCI: Ignoring host bridge windows from ACPI; if necessary, use
> "pci=use_crs" and report a bug
> ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-ff])
> pci_root PNP0A03:00: host bridge window [io  0x0000-0x0cf7] (ignored)
> pci_root PNP0A03:00: host bridge window [io  0x0d00-0xffff] (ignored)
> pci_root PNP0A03:00: host bridge window [mem 0x000a0000-0x000bffff]
> (ignored)
> pci_root PNP0A03:00: host bridge window [mem 0xe0000000-0xfebfffff]
> (ignored)
> pci 0000:00:01.1: reg 20: [io  0xc000-0xc00f]
> pci 0000:00:01.2: reg 20: [io  0xc020-0xc03f]
> pci 0000:00:01.3: quirk: [io  0xb000-0xb03f] claimed by PIIX4 ACPI
> pci 0000:00:01.3: quirk: [io  0xb100-0xb10f] claimed by PIIX4 SMB
> pci 0000:00:02.0: reg 10: [mem 0xf0000000-0xf1ffffff pref]
> pci 0000:00:02.0: reg 14: [mem 0xf2000000-0xf2000fff]
> pci 0000:00:02.0: reg 30: [mem 0xf2010000-0xf201ffff pref]
> pci 0000:00:03.0: reg 10: [mem 0xf2020000-0xf203ffff]
> pci 0000:00:03.0: reg 14: [io  0xc040-0xc07f]
> pci 0000:00:03.0: reg 30: [mem 0xf2040000-0xf205ffff pref]
> pci_bus 0000:00: on NUMA node 0
> ACPI: PCI Interrupt Routing Table [\_SB_.PCI0._PRT]
> ACPI: PCI Interrupt Link [LNKA] (IRQs 5 *10 11)
> ACPI: PCI Interrupt Link [LNKB] (IRQs 5 *10 11)
> ACPI: PCI Interrupt Link [LNKC] (IRQs 5 10 *11)
> ACPI: PCI Interrupt Link [LNKD] (IRQs 5 10 *11)
> vgaarb: device added: PCI:0000:00:02.0,decodes=io+mem,owns=io+mem,locks=none
> vgaarb: loaded
> SCSI subsystem initialized
> libata version 3.00 loaded.
> usbcore: registered new interface driver usbfs
> usbcore: registered new interface driver hub
> usbcore: registered new device driver usb
> Advanced Linux Sound Architecture Driver Version 1.0.23.
> PCI: Using ACPI for IRQ routing
> PCI: pci_cache_line_size set to 64 bytes
> reserve RAM buffer: 000000000009f000 - 000000000009ffff
> reserve RAM buffer: 000000003e7fb000 - 000000003fffffff
> cfg80211: Calling CRDA to update world regulatory domain
> HPET: 3 timers in total, 0 timers will be used for per-cpu timer
> hpet0: at MMIO 0xfed00000, IRQs 2, 8, 0
> hpet0: 3 comparators, 64-bit 100.000000 MHz counter
> Switching to clocksource tsc
> Slow work thread pool: Starting up
> Slow work thread pool: Ready
> FS-Cache: Loaded
> CacheFiles: Loaded
> pnp: PnP ACPI init
> ACPI: bus type pnp registered
> pnp: PnP ACPI: found 8 devices
> ACPI: ACPI bus type pnp unregistered
> pci_bus 0000:00: resource 0 [io  0x0000-0xffff]
> pci_bus 0000:00: resource 1 [mem 0x00000000-0xffffffffffffffff]
> NET: Registered protocol family 2
> IP route cache hash table entries: 32768 (order: 6, 262144 bytes)
> TCP established hash table entries: 131072 (order: 9, 2097152 bytes)
> TCP bind hash table entries: 65536 (order: 8, 1048576 bytes)
> TCP: Hash tables configured (established 131072 bind 65536)
> TCP reno registered
> UDP hash table entries: 512 (order: 2, 16384 bytes)
> UDP-Lite hash table entries: 512 (order: 2, 16384 bytes)
> NET: Registered protocol family 1
> RPC: Registered udp transport module.
> RPC: Registered tcp transport module.
> RPC: Registered tcp NFSv4.1 backchannel transport module.
> pci 0000:00:00.0: Limiting direct PCI/PCI transfers
> pci 0000:00:01.0: PIIX3: Enabling Passive Release
> pci 0000:00:01.0: Activating ISA DMA hang workarounds
> pci 0000:00:02.0: Boot video device
> PCI: CLS 0 bytes, default 64
> Unpacking initramfs...
> Freeing initrd memory: 8964k freed
> kvm: no hardware support
> fuse init (API version 7.13)
> msgmni has been set to 1948
> alg: No test for stdrng (krng)
> io scheduler noop registered
> io scheduler cfq registered (default)
> input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input0
> ACPI: Power Button [PWRF]
> Linux agpgart interface v0.103
> Hangcheck: starting hangcheck timer 0.9.1 (tick is 180 seconds, margin
> is 60 seconds).
> Hangcheck: Using getrawmonotonic().
> [drm] Initialized drm 1.1.0 20060810
> [drm:i915_init] *ERROR* drm/i915 can't work without intel_agp module!
> Serial: 8250/16550 driver, 2 ports, IRQ sharing disabled
> serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
> 00:06: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
> parport_pc 00:05: reported by Plug and Play ACPI
> parport0: PC-style at 0x378, irq 7 [PCSPP,TRISTATE]
> FDC 0 is a S82078B
> loop: module loaded
> ata_piix 0000:00:01.1: version 2.13
> ata_piix 0000:00:01.1: setting latency timer to 64
> scsi0 : ata_piix
> scsi1 : ata_piix
> ata1: PATA max MWDMA2 cmd 0x1f0 ctl 0x3f6 bmdma 0xc000 irq 14
> ata2: PATA max MWDMA2 cmd 0x170 ctl 0x376 bmdma 0xc008 irq 15
> e1000: Intel(R) PRO/1000 Network Driver - version 7.3.21-k6-NAPI
> e1000: Copyright (c) 1999-2006 Intel Corporation.
> ACPI: PCI Interrupt Link [LNKC] enabled at IRQ 11
> e1000 0000:00:03.0: PCI INT A -> Link[LNKC] -> GSI 11 (level, high) ->
> IRQ 11
> e1000 0000:00:03.0: setting latency timer to 64
> ata1.00: ATA-7: QEMU HARDDISK, 0.12.3, max UDMA/100
> ata1.00: 20971520 sectors, multi 16: LBA48
> ata1.01: ATA-7: QEMU HARDDISK, 0.12.3, max UDMA/100
> ata1.01: 1433602 sectors, multi 16: LBA48
> ata2.01: NODEV after polling detection
> ata2.00: ATAPI: QEMU DVD-ROM, 0.12.3, max UDMA/100
> ata2.00: configured for MWDMA2
> ata1.00: configured for MWDMA2
> ata1.01: configured for MWDMA2
> scsi 0:0:0:0: Direct-Access     ATA      QEMU HARDDISK    0.12 PQ: 0 ANSI: 5
> scsi 0:0:1:0: Direct-Access     ATA      QEMU HARDDISK    0.12 PQ: 0 ANSI: 5
> sd 0:0:0:0: [sda] 20971520 512-byte logical blocks: (10.7 GB/10.0 GiB)
> scsi 1:0:0:0: CD-ROM            QEMU     QEMU DVD-ROM     0.12 PQ: 0 ANSI: 5
> sd 0:0:0:0: [sda] Write Protect is off
> sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
> sd 0:0:0:0: [sda] Write cache: disabled, read cache: enabled, doesn't
> support DPO or FUA
> sd 0:0:1:0: [sdb] 1433602 512-byte logical blocks: (734 MB/700 MiB)
>  sda:sr0: scsi3-mmc drive: 4x/4x xa/form2 tray
> Uniform CD-ROM driver Revision: 3.20
>  sda1
> sd 0:0:1:0: [sdb] Write Protect is off
> sr 1:0:0:0: Attached scsi CD-ROM sr0
> sd 0:0:0:0: [sda] Attached SCSI disk
> sd 0:0:1:0: [sdb] Mode Sense: 00 3a 00 00
> sd 0:0:1:0: [sdb] Write cache: disabled, read cache: enabled, doesn't
> support DPO or FUA
>  sdb: unknown partition table
> sd 0:0:1:0: [sdb] Attached SCSI disk
> e1000 0000:00:03.0: eth0: (PCI:33MHz:32-bit)
> e1000 0000:00:03.0: eth0: 52:54:00:12:34:56
> e1000 0000:00:03.0: eth0: Intel(R) PRO/1000 Network Connection
> e1000e: Intel(R) PRO/1000 Network Driver - 1.0.2-k4
> e1000e: Copyright (c) 1999 - 2009 Intel Corporation.
> tun: Universal TUN/TAP device driver, 1.6
> tun: (C) 1999-2004 Max Krasnyansky <maxk@...lcomm.com>
> console [netcon0] enabled
> netconsole: network logging started
> ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
> uhci_hcd: USB Universal Host Controller Interface driver
> ACPI: PCI Interrupt Link [LNKD] enabled at IRQ 10
> uhci_hcd 0000:00:01.2: PCI INT D -> Link[LNKD] -> GSI 10 (level, high)
> -> IRQ 10
> uhci_hcd 0000:00:01.2: setting latency timer to 64
> uhci_hcd 0000:00:01.2: UHCI Host Controller
> uhci_hcd 0000:00:01.2: new USB bus registered, assigned bus number 1
> uhci_hcd 0000:00:01.2: irq 10, io base 0x0000c020
> hub 1-0:1.0: USB hub found
> hub 1-0:1.0: 2 ports detected
> PNP: PS/2 Controller [PNP0303:KBD,PNP0f13:MOU] at 0x60,0x64 irq 1,12
> serio: i8042 KBD port at 0x60,0x64 irq 1
> serio: i8042 AUX port at 0x60,0x64 irq 12
> mice: PS/2 mouse device common for all mice
> input: AT Translated Set 2 keyboard as
> /devices/platform/i8042/serio0/input/input1
> rtc_cmos 00:01: rtc core: registered rtc_cmos as rtc0
> rtc0: alarms up to one day, 114 bytes nvram, hpet irqs
> i2c /dev entries driver
> coretemp: CPU (model=0x2) has no thermal sensor.
> coretemp: CPU (model=0x2) has no thermal sensor.
> md: raid0 personality registered for level 0
> md: raid1 personality registered for level 1
> device-mapper: ioctl: 4.17.0-ioctl (2010-03-05) initialised:
> dm-devel@...hat.com
> cpuidle: using governor ladder
> cpuidle: using governor menu
> Registered led device: input::numl
> Registered led device: input::capsl
> Registered led device: input::scrolll
> Registered led device: input1::numl
> Registered led device: input1::capsl
> Registered led device: input1::scrolll
> usbcore: registered new interface driver usbhid
> usbhid: USB HID core driver
> ALSA device list:
>   No soundcards found.
> TCP cubic registered
> NET: Registered protocol family 10
> NET: Registered protocol family 17
> registered taskstats version 1
> rtc_cmos 00:01: setting system clock to 2010-06-01 14:42:57 UTC (1275403377)
> Freeing unused kernel memory: 424k freed
> Write protecting the kernel read-only data: 8192k
> Freeing unused kernel memory: 488k freed
> Freeing unused kernel memory: 328k freed
> udev: starting version 154
> PM: Starting manual resume from disk
> EXT4-fs (sda1): (no)acl options not supported
> EXT4-fs (sda1): mounted filesystem with ordered data mode
> EXT4-fs (sda1): (no)acl options not supported
> udev: starting version 154
> Adding 716796k swap on /dev/sdb.  Priority:-1 extents:1 across:716796k
> ADDRCONF(NETDEV_UP): eth0: link is not ready
> e1000: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX
> ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
> Syncing filesystems ... done.
> Freezing user space processes ... (elapsed 0.01 seconds) done.
> Freezing remaining freezable tasks ... (elapsed 0.01 seconds) done.
> PM: Preallocating image memory... done (allocated 28778 pages)
> PM: Allocated 115112 kbytes in 0.03 seconds (3837.06 MB/s)
> e1000 0000:00:03.0: PCI INT A disabled
> PM: freeze of devices complete after 54.045 msecs
> PM: late freeze of devices complete after 0.614 msecs
> ACPI: Preparing to enter system sleep state S4
> PM: Saving platform NVS memory
> Disabling non-boot CPUs ...
> Broke affinity for irq 14
> CPU 1 is now offline
> SMP alternatives: switching to UP code
> PM: Creating hibernation image:
> PM: Need to copy 28341 pages
> PM: Hibernation image created (28341 pages copied)
> Enabling non-boot CPUs ...
> SMP alternatives: switching to SMP code
> Booting Node 0 Processor 1 APIC 0x1
> NMI watchdog failed to create perf event on cpu1: ffffffffffffffed
> CPU1 is up
> ACPI: Waking up from system sleep state S4
> PM: early thaw of devices complete after 0.025 msecs
> ata_piix 0000:00:01.1: restoring config space at offset 0x1 (was
> 0x2800003, writing 0x2800007)
> e1000 0000:00:03.0: restoring config space at offset 0x1 (was 0x100003,
> writing 0x100007)
> e1000 0000:00:03.0: PCI INT A -> Link[LNKC] -> GSI 11 (level, high) ->
> IRQ 11
> e1000 0000:00:03.0: setting latency timer to 64
> ata_piix 0000:00:01.1: setting latency timer to 64
> sd 0:0:0:0: [sda] Starting disk
> sd 0:0:1:0: [sdb] Starting disk
> e1000: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX
> ata1.00: configured for MWDMA2
> ata1.01: configured for MWDMA2
> PM: thaw of devices complete after 166.297 msecs
> PM: Saving image data pages (28397 pages) ... done
> PM: Wrote 113588 kbytes in 2.95 seconds (38.50 MB/s)
> ata2.01: qc timeout (cmd 0xec)
> ata2.01: failed to IDENTIFY (I/O error, err_mask=0x4)
> sd 0:0:1:0: [sdb] Stopping disk
> sd 0:0:0:0: [sda] Stopping disk
> uhci_hcd 0000:00:01.2: PCI INT D disabled
> e1000 0000:00:03.0: PCI INT A disabled
> ata2.01: qc timeout (cmd 0xec)
> ata2.01: failed to IDENTIFY (I/O error, err_mask=0x4)
> 
> 
> -- 
> js
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