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* Re: Bug report : reproducible memory allocator bug in 2.6.19.2
       [not found] <20070128200917.GA16571@Krystal>
@ 2007-01-28 20:25 ` Martin J. Bligh
  2007-01-28 21:05   ` Bug report : reproducible memory allocator bug in 2.6.20-rc6 Mathieu Desnoyers
  2007-01-30  3:27   ` Bug report : reproducible memory bug (hardware failure, sorry) Mathieu Desnoyers
  0 siblings, 2 replies; 4+ messages in thread
From: Martin J. Bligh @ 2007-01-28 20:25 UTC (permalink / raw)
  To: Mathieu Desnoyers; +Cc: linux-kernel, Andrew Morton, Ingo Molnar

Mathieu Desnoyers wrote:
> Hi,
> 
> Trying to build cross-compilers (or kernels) on a 2-way x86_64 (amd64) with
> make -j3 triggers the following OOPS after about 30 minutes on
> 2.6.19.2. Due to the amount of time and the heavy load it takes before it
> happens, I suspect a race condition. Memtest86 tests passed ok. The
> amount of swap used when the condition happens is about 52k and stable
> (only ~800MB/1GB are used).
> 
> I am going to give it a look, but I suspect you might help narrowing it
> down more quickly. Any insight would be appreciated.

Mmm. that's going to be messy to debug ... but didn't we already know
that kernel was racy? Or is 2.6.19.2 after that fix already? Does 20-rc6
still break?

M.

^ permalink raw reply	[flat|nested] 4+ messages in thread

* Re: Bug report : reproducible memory allocator bug in 2.6.20-rc6
  2007-01-28 20:25 ` Bug report : reproducible memory allocator bug in 2.6.19.2 Martin J. Bligh
@ 2007-01-28 21:05   ` Mathieu Desnoyers
  2007-01-30  3:27   ` Bug report : reproducible memory bug (hardware failure, sorry) Mathieu Desnoyers
  1 sibling, 0 replies; 4+ messages in thread
From: Mathieu Desnoyers @ 2007-01-28 21:05 UTC (permalink / raw)
  To: Martin J. Bligh; +Cc: linux-kernel, Andrew Morton, Ingo Molnar

* Martin J. Bligh (mbligh@mbligh.org) wrote:
> Mathieu Desnoyers wrote:
> >Hi,
> >
> >Trying to build cross-compilers (or kernels) on a 2-way x86_64 (amd64) with
> >make -j3 triggers the following OOPS after about 30 minutes on
> >2.6.19.2. Due to the amount of time and the heavy load it takes before it
> >happens, I suspect a race condition. Memtest86 tests passed ok. The
> >amount of swap used when the condition happens is about 52k and stable
> >(only ~800MB/1GB are used).
> >
> >I am going to give it a look, but I suspect you might help narrowing it
> >down more quickly. Any insight would be appreciated.
> 
> Mmm. that's going to be messy to debug ... but didn't we already know
> that kernel was racy? Or is 2.6.19.2 after that fix already? Does 20-rc6
> still break?
> 

Hi Martin,

I hoped it would go away magically too, but here is a similar list bug
happening on 2.6.20-rc6, this time from "release_pages".

-- SUMMARY ---

list_del corruption. next->prev should be ffff81003b5315d8, but was ffff81003b21e1d0
------------[ cut here ]------------
kernel BUG at /home/compudj/git/linux-2.6-lttng/lib/list_debug.c:72!
invalid opcode: 0000 [1] SMP 
CPU 1 
Modules linked in: ipv6 ppdev lp parport_serial dm_snapshot dm_mirror dm_mod sbp2 loop ide_cd cdrom eth1394 snd_hda_intel snd_hda_codec snd_pcm_oss snd_mixer_oss snd_pcm amd74xx snd_timer snd serio_raw soundcore i2c_nforce2 ohci_hcd psmouse pcspkr ohci1394 ieee1394 i2c_core parport_pc parport ehci_hcd snd_page_alloc forcedeth floppy ext3 jbd mbcache sd_mod generic ide_core ata_generic sata_nv libata scsi_mod evdev
Pid: 11807, comm: ld Not tainted 2.6.20-rc6 #1
RIP: 0010:[<ffffffff803298e4>]  [<ffffffff803298e4>] list_del+0x3f/0x5b
RSP: 0018:ffff81001774fc68  EFLAGS: 00010096
RAX: 0000000000000058 RBX: ffff81003b531590 RCX: ffffffff806096b8
RDX: ffff81001c86d100 RSI: 0000000000000001 RDI: 0000000000000096
RBP: ffff81001774fc68 R08: 0000000000000002 R09: 0000000000000080
R10: 0000000000000080 R11: ffff810001020b00 R12: ffff81000000b440
R13: ffff81000101ea28 R14: 0000000000000000 R15: 000000000000000e
FS:  00002acae32b3c80(0000) GS:ffff8100011af138(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 00002acae3108150 CR3: 0000000000201000 CR4: 00000000000006e0
Process ld (pid: 11807, threadinfo ffff81001774e000, task ffff81001c86d100)
Stack:  ffff81001774fd28 ffffffff8020b142 0000000000000000 0000000000000000
 ffff81003ba5ca80 ffff81003b10e938 ffff81003bd46c40 ffff81003b21e188
 ffff81003bbf4790 ffff81003b165128 ffff81003af43958 ffff81003b8c19e0
Call Trace:
 [<ffffffff8020b142>] release_pages+0xdb/0x18a
 [<ffffffff8020e44d>] free_pages_and_swap_cache+0x7b/0x96
 [<ffffffff80207d6d>] unmap_vmas+0x437/0x6ff
 [<ffffffff802396ed>] exit_mmap+0x7a/0xf1
 [<ffffffff8023b8af>] mmput+0x3d/0x8f
 [<ffffffff8023ffe6>] exit_mm+0xe1/0xea
 [<ffffffff8021490a>] do_exit+0x230/0x83d
 [<ffffffff802621ca>] trace_hardirqs_on_thunk+0x35/0x37
 [<ffffffff80247481>] debug_mutex_init+0x0/0x45
 [<ffffffff8024accc>] sys_exit_group+0x12/0x14
 [<ffffffff8025b11e>] system_call+0x7e/0x83




--- whole dmesg ----
root  (hd0,0)
 Filesystem type is ext2fs, partition type 0x83
kernel  /vmlinuz root=/dev/sda2 ro console=tty0 console=ttyS0,38400n8 
   [Linux-bzImage, setup=0x1e00, size=0x1a25e1]
initrd  /initrd.img
   [Linux-initrd @ 0x37c66000, 0x389efd bytes]
savedefault

0000:04:08.0: ttyS0 at I/O 0xc880 (irq = 19) is a 16550A
RAMDISK driver initialized: 16 RAM disks of 65536K size 1024 blocksize
usbmon: debugfs is not available
PNP: PS/2 Controller [PNP0303:PS2K] at 0x60,0x64 irq 1
PNP: PS/2 controller doesn't have AUX irq; using default 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
TCP bic registered
NET: Registered protocol family 1
NET: Registered protocol family 17
NET: Registered protocol family 8
NET: Registered protocol family 20
input: AT Translated Set 2 keyboard as /class/input/input0
ACPI: (supports S0 S1 S3 S4 S5)
Freeing unused kernel memory: 296k freed
SCSI subsystem initialized
ACPI: PCI Interrupt Link [LSA0] enabled at IRQ 23
ACPI: PCI Interrupt 0000:00:0e.0[A] -> Link [LSA0] -> GSI 23 (level, low) -> IRQ 23
ata1: SATA max UDMA/133 cmd 0xE800 ctl 0xE482 bmdma 0xE000 irq 23
ata2: SATA max UDMA/133 cmd 0xE400 ctl 0xE082 bmdma 0xE008 irq 23
scsi0 : sata_nv
ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
ata1.00: ATA-7, max UDMA/133, 390721968 sectors: LBA48 NCQ (depth 0/32)
ata1.00: ata1: dev 0 multi count 16
ata1.00: configured for UDMA/133
scsi1 : sata_nv
ata2: SATA link down (SStatus 0 SControl 300)
ATA: abnormal status 0x7F on port 0xE407
scsi 0:0:0:0: Direct-Access     ATA      ST3200827AS      3.AA PQ: 0 ANSI: 5
ACPI: PCI Interrupt Link [LSA1] enabled at IRQ 22
ACPI: PCI Interrupt 0000:00:0f.0[A] -> Link [LSA1] -> GSI 22 (level, low) -> IRQ 22
ata3: SATA max UDMA/133 cmd 0xDC00 ctl 0xD882 bmdma 0xD400 irq 22
ata4: SATA max UDMA/133 cmd 0xD800 ctl 0xD482 bmdma 0xD408 irq 22
scsi2 : sata_nv
ata3: SATA link down (SStatus 0 SControl 300)
ATA: abnormal status 0x7F on port 0xDC07
scsi3 : sata_nv
ata4: SATA link down (SStatus 0 SControl 300)
ATA: abnormal status 0x7F on port 0xD807
Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
SCSI device sda: 390721968 512-byte hdwr sectors (200050 MB)
sda: Write Protect is off
SCSI device sda: write cache: enabled, read cache: enabled, doesn't support DPO or FUA
SCSI device sda: 390721968 512-byte hdwr sectors (200050 MB)
sda: Write Protect is off
SCSI device sda: write cache: enabled, read cache: enabled, doesn't support DPO or FUA
 sda: sda1 sda2 sda3 < sda5 sda6 >
sd 0:0:0:0: Attached scsi disk sda
kjournald starting.  Commit interval 5 seconds
EXT3-fs: mounted filesystem with ordered data mode.
Switching root ...
INIT: version 2.86 booting
Starting the hotplug events dispatcher: udevd.
Synthesizing the initial hotplug events...done.
Waiting for /dev to be fully populated...Floppy drive(s): fd0 is 1.44M
FDC 0 is a post-1991 82077
forcedeth.c: Reverse Engineered nForce ethernet driver. Version 0.59.
ACPI: PCI Interrupt Link [LMAC] enabled at IRQ 21
ACPI: PCI Interrupt 0000:00:14.0[A] -> Link [LMAC] -> GSI 21 (level, low) -> IRQ 21
forcedeth: using HIGHDMA
parport: PnPBIOS parport detected.
parport0: PC-style at 0x378, irq 7 [PCSPP]
eth0: forcedeth.c: subsystem: 01043:8141 bound to 0000:00:14.0
ACPI: PCI Interrupt Link [LUB2] enabled at IRQ 20
ACPI: PCI Interrupt 0000:00:0b.1[B] -> Link [LUB2] -> GSI 20 (level, low) -> IRQ 20
ehci_hcd 0000:00:0b.1: EHCI Host Controller
ehci_hcd 0000:00:0b.1: new USB bus registered, assigned bus number 1
ehci_hcd 0000:00:0b.1: debug port 1
ehci_hcd 0000:00:0b.1: irq 20, io mem 0xfebdfc00
ehci_hcd 0000:00:0b.1: USB 2.0 started, EHCI 1.00, driver 10 Dec 2004
usb usb1: configuration #1 chosen from 1 choice
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 8 ports detected
input: PC Speaker as /class/input/input1
ACPI: PCI Interrupt Link [LNKD] enabled at IRQ 18
ACPI: PCI Interrupt 0000:04:05.0[A] -> Link [LNKD] -> <6>i2c_adapter i2c-0: nForce2 SMBus adapter at 0x600
i2c_adapter i2c-1: nForce2 SMBus adapter at 0x700
GSI 18 (level, low) -> IRQ 18
ohci1394: fw-host0: OHCI-1394 1.0 (PCI): IRQ=[18]  MMIO=[faaff800-faafffff]  Max Packet=[2048]  IR/IT contexts=[4/8]
ACPI: PCI Interrupt Link [LUB0] enabled at IRQ 23
ACPI: PCI Interrupt 0000:00:0b.0[A] -> Link [LUB0] -> GSI 23 (level, low) -> IRQ 23
ohci_hcd 0000:00:0b.0: OHCI Host Controller
ohci_hcd 0000:00:0b.0: new USB bus registered, assigned bus number 2
ohci_hcd 0000:00:0b.0: irq 23, io mem 0xfebde000
usb usb2: configuration #1 chosen from 1 choice
hub 2-0:1.0: USB hub found
hub 2-0:1.0: 8 ports detected
NFORCE-MCP51: IDE controller at PCI slot 0000:00:0d.0
NFORCE-MCP51: chipset revision 161
NFORCE-MCP51: not 100% native mode: will probe irqs later
NFORCE-MCP51: 0000:00:0d.0 (rev a1) UDMA133 controller
    ide0: BM-DMA at 0xffa0-0xffa7, BIOS settings: hda:DMA, hdb:DMA
    ide1: BM-DMA at 0xffa8-0xffaf, BIOS settings: hdc:pio, hdd:pio
hda: HL-DT-ST DVDRAM GSA-H10N, ATAPI CD/DVD-ROM drive
eth1394: eth0: IEEE-1394 IPv4 over 1394 Ethernet (fw-host0)
hdb: LITE-ON CD-ROM LTN-5291S, ATAPI CD/DVD-ROM drive
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
ACPI: PCI Interrupt Link [LAZA] enabled at IRQ 22
ACPI: PCI Interrupt 0000:00:10.1[B] -> Link [LAZA] -> GSI 22 (level, low) -> IRQ 22
hda: ATAPI 48X DVD-ROM DVD-R-RAM CD-R/RW drive, 2048kB Cache, UDMA(33)
Uniform CD-ROM driver Revision: 3.20
hdb: ATAPI 52X CD-ROM drive, 96kB Cache, UDMA(33)
done.
Activating swap...Adding 2000052k swap on /dev/sda5.  Priority:-1 extents:1 across:2000052k
done.
Checking root file system...fsck 1.40-WIP (14-Nov-2006)
/dev/sda2: clean, 246842/4889248EXT3 FS on sda2,  files, 2723904/internal journal
9765511 blocks
done.
Setting the system clock again..
Cleaning up ifupdown....
Loading modules...loop: loaded (max 8 devices)
done.
Loading device-mapper supportdevice-mapper: ioctl: 4.11.0-ioctl (2006-10-12) initialised: dm-devel@redhat.com
.
Checking file systems...fsck 1.40-WIP (14-Nov-2006)
/dev/sda1: clean, 54/122880 files, 61989/489948 blocks
/dev/sda6: clean, 1190226/12222464 files, 5154123/24414775 blocks
done.
Setting kernel variables...error: "net.ipv4.netfilter.ip_conntrack_tcp_be_liberal" is an unknown key
failed.
Mounting local filesystems...kjournald starting.  Commit interval 5 seconds
EXT3 FS on sda1, internal journal
EXT3-fs: mounted filesystem with ordered data mode.
kjournald starting.  Commit interval 5 seconds
EXT3 FS on sda6, internal journal
EXT3-fs: mounted filesystem with ordered data mode.
done.
Activating swapfile swap...done.
Detecting hardware...Setting up networking....
Configuring network interfaces...done.
Starting portmap daemon....
Setting console screen modes and fonts.
Setting up ALSA...done.
INIT: Entering runlevel: 2
Starting system log daemon: syslogd.
Starting kernel log daemon: klogd.
Starting portmap daemon...Already running..
Starting BitTorrent tracker: disabled in /etc/default/bittorrent.
Starting Common Unix Printing System: cupsdlp0: using parport0 (interrupt-driven).
ppdev: user-space parallel port driver
.
Starting system message bus: dbus.
Starting Hardware abstraction layer: hald.
Starting Avahi mDNS/DNS-SD Daemon: avahi-daemonNET: Registered protocol family 10
lo: Disabled Privacy Extensions
.
Starting MTA: exim4.
Starting printer spooler: lpd.
Starting internet superserver: inetd.
Starting OpenBSD Secure Shell server: sshd.
Starting GNOME Display Manager: gdm.
Starting NFS common utilities: statd.
Starting deferred execution scheduler: atd.
Starting periodic command scheduler: crond.

Debian GNU/Linux 4.0 amd64 ttyS0

amd64 login: 
list_del corruption. next->prev should be ffff81003b5315d8, but was ffff81003b21e1d0
------------[ cut here ]------------
kernel BUG at /home/compudj/git/linux-2.6-lttng/lib/list_debug.c:72!
invalid opcode: 0000 [1] SMP 
CPU 1 
Modules linked in: ipv6 ppdev lp parport_serial dm_snapshot dm_mirror dm_mod sbp2 loop ide_cd cdrom eth1394 snd_hda_intel snd_hda_codec snd_pcm_oss snd_mixer_oss snd_pcm amd74xx snd_timer snd serio_raw soundcore i2c_nforce2 ohci_hcd psmouse pcspkr ohci1394 ieee1394 i2c_core parport_pc parport ehci_hcd snd_page_alloc forcedeth floppy ext3 jbd mbcache sd_mod generic ide_core ata_generic sata_nv libata scsi_mod evdev
Pid: 11807, comm: ld Not tainted 2.6.20-rc6 #1
RIP: 0010:[<ffffffff803298e4>]  [<ffffffff803298e4>] list_del+0x3f/0x5b
RSP: 0018:ffff81001774fc68  EFLAGS: 00010096
RAX: 0000000000000058 RBX: ffff81003b531590 RCX: ffffffff806096b8
RDX: ffff81001c86d100 RSI: 0000000000000001 RDI: 0000000000000096
RBP: ffff81001774fc68 R08: 0000000000000002 R09: 0000000000000080
R10: 0000000000000080 R11: ffff810001020b00 R12: ffff81000000b440
R13: ffff81000101ea28 R14: 0000000000000000 R15: 000000000000000e
FS:  00002acae32b3c80(0000) GS:ffff8100011af138(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 00002acae3108150 CR3: 0000000000201000 CR4: 00000000000006e0
Process ld (pid: 11807, threadinfo ffff81001774e000, task ffff81001c86d100)
Stack:  ffff81001774fd28 ffffffff8020b142 0000000000000000 0000000000000000
 ffff81003ba5ca80 ffff81003b10e938 ffff81003bd46c40 ffff81003b21e188
 ffff81003bbf4790 ffff81003b165128 ffff81003af43958 ffff81003b8c19e0
Call Trace:
 [<ffffffff8020b142>] release_pages+0xdb/0x18a
 [<ffffffff8020e44d>] free_pages_and_swap_cache+0x7b/0x96
 [<ffffffff80207d6d>] unmap_vmas+0x437/0x6ff
 [<ffffffff802396ed>] exit_mmap+0x7a/0xf1
 [<ffffffff8023b8af>] mmput+0x3d/0x8f
 [<ffffffff8023ffe6>] exit_mm+0xe1/0xea
 [<ffffffff8021490a>] do_exit+0x230/0x83d
 [<ffffffff802621ca>] trace_hardirqs_on_thunk+0x35/0x37
 [<ffffffff80247481>] debug_mutex_init+0x0/0x45
 [<ffffffff8024accc>] sys_exit_group+0x12/0x14
 [<ffffffff8025b11e>] system_call+0x7e/0x83


Code: 0f 0b eb fe 48 89 48 08 48 89 01 48 c7 47 08 00 02 20 00 48 
RIP  [<ffffffff803298e4>] list_del+0x3f/0x5b
 RSP <ffff81001774fc68>
 <1>Fixing recursive fault but reboot is needed!
NMI Watchdog detected LOCKUP on CPU 0
CPU 0 
Modules linked in: ipv6 ppdev lp parport_serial dm_snapshot dm_mirror dm_mod sbp2 loop ide_cd cdrom eth1394 snd_hda_intel snd_hda_codec snd_pcm_oss snd_mixer_oss snd_pcm amd74xx snd_timer snd serio_raw soundcore i2c_nforce2 ohci_hcd psmouse pcspkr ohci1394 ieee1394 i2c_core parport_pc parport ehci_hcd snd_page_alloc forcedeth floppy ext3 jbd mbcache sd_mod generic ide_core ata_generic sata_nv libata scsi_mod evdev
Pid: 11821, comm: sh Not tainted 2.6.20-rc6 #1
RIP: 0010:[<ffffffff802078be>]  [<ffffffff802078be>] _raw_spin_lock+0x81/0xf9
RSP: 0000:ffff810002317cb8  EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff81000000b700 RCX: 00000000f6a35d61
RDX: 000000000000033a RSI: ffff8100178608c0 RDI: 0000000000000001
RBP: ffff810002317cd8 R08: 0000000000000002 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000006ab296d
R13: 0000000000000001 R14: 0000000077c3cc34 R15: ffff81001dcc6bb8
FS:  00002b12d23036d0(0000) GS:ffffffff80548000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 00000000005be064 CR3: 000000002a9e2000 CR4: 00000000000006e0
Process sh (pid: 11821, threadinfo ffff810002316000, task ffff810017860140)
Stack:  ffff81000000b700 ffff81000000b440 ffff810001019480 0000000000000000
 ffff810002317cf8 ffffffff80262975 ffff81003b7347d0 ffff81003b498cf0
 ffff810002317d28 ffffffff8020d436 0000000000000012 ffff81003b542cb0
Call Trace:
 [<ffffffff80262975>] _spin_lock_irq+0x33/0x38
 [<ffffffff8020d436>] __pagevec_lru_add_active+0x62/0xdf
 [<ffffffff8020ffa0>] lru_cache_add_active+0x4f/0x51
 [<ffffffff802106f3>] do_wp_page+0x401/0x4aa
 [<ffffffff80208ff9>] __handle_mm_fault+0x96b/0x9e2
 [<ffffffff8020aab5>] do_page_fault+0x364/0x817
 [<ffffffff8020ab74>] do_page_fault+0x423/0x817
 [<ffffffff802629e0>] _spin_unlock_irq+0x2b/0x31
 [<ffffffff802629e0>] _spin_unlock_irq+0x2b/0x31
 [<ffffffff80228ebd>] do_sigaction+0x17a/0x190
 [<ffffffff802621ca>] trace_hardirqs_on_thunk+0x35/0x37
 [<ffffffff80262c8d>] error_exit+0x0/0x96


Code: 7f 55 bf 01 00 00 00 49 ff c4 e8 d2 53 00 00 4d 39 f4 75 e6 
 NMI Watchdog detected LOCKUP on CPU 1
CPU 1 
Modules linked in: ipv6 ppdev lp parport_serial dm_snapshot dm_mirror dm_mod sbp2 loop ide_cd cdrom eth1394 snd_hda_intel snd_hda_codec snd_pcm_oss snd_mixer_oss snd_pcm amd74xx snd_timer snd serio_raw soundcore i2c_nforce2 ohci_hcd psmouse pcspkr ohci1394 ieee1394 i2c_core parport_pc parport ehci_hcd snd_page_alloc forcedeth floppy ext3 jbd mbcache sd_mod generic ide_core ata_generic sata_nv libata scsi_mod evdev
Pid: 11815, comm: sh Not tainted 2.6.20-rc6 #1
RIP: 0010:[<ffffffff802078b8>]  [<ffffffff802078b8>] _raw_spin_lock+0x7b/0xf9
RSP: 0000:ffff810024e4fcb8  EFLAGS: 00000083
RAX: 000000000000000a RBX: ffff81000000b700 RCX: 00000000f7837878
RDX: 000000000000033d RSI: ffff810024e4fcd8 RDI: 0000000000000001
RBP: ffff810024e4fcd8 R08: 0000000000000002 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000001 R12: 000000000b7745fb
R13: 0000000000000001 R14: 0000000077c3cc34 R15: ffff81000fc4cc80
FS:  00002b7057d366d0(0000) GS:ffff8100011af138(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 00002b7057899398 CR3: 0000000023ebe000 CR4: 00000000000006e0
Process sh (pid: 11815, threadinfo ffff810024e4e000, task ffff81002cd0d080)
Stack:  ffff81000000b700 ffff81000000b440 ffff810001022480 0000000000000000
 ffff810024e4fcf8 ffffffff80262975 ffff81003bdc0ea0 ffff81003ba5ca80
 ffff810024e4fd28 ffffffff8020d436 0000000000000012 ffff81003be9b508
Call Trace:
 [<ffffffff80262975>] _spin_lock_irq+0x33/0x38
 [<ffffffff8020d436>] __pagevec_lru_add_active+0x62/0xdf
 [<ffffffff8020ffa0>] lru_cache_add_active+0x4f/0x51
 [<ffffffff802106f3>] do_wp_page+0x401/0x4aa
 [<ffffffff80208ff9>] __handle_mm_fault+0x96b/0x9e2
 [<ffffffff8020aab5>] do_page_fault+0x364/0x817
 [<ffffffff8020ab74>] do_page_fault+0x423/0x817
 [<ffffffff802629e0>] _spin_unlock_irq+0x2b/0x31
 [<ffffffff8025fe30>] thread_return+0x88/0x12d
 [<ffffffff80262c8d>] error_exit+0x0/0x96


Code: 31 c0 87 03 85 c0 7f 55 bf 01 00 00 00 49 ff c4 e8 d2 53 00 
 
--- ksymoops ---


kernel BUG at /home/compudj/git/linux-2.6-lttng/lib/list_debug.c:72!
CPU 1 
Pid: 11807, comm: ld Not tainted 2.6.20-rc6 #1
RIP: 0010:[<ffffffff803298e4>]  [<ffffffff803298e4>] list_del+0x3f/0x5b
RSP: 0018:ffff81001774fc68  EFLAGS: 00010096
RAX: 0000000000000058 RBX: ffff81003b531590 RCX: ffffffff806096b8
RDX: ffff81001c86d100 RSI: 0000000000000001 RDI: 0000000000000096
RBP: ffff81001774fc68 R08: 0000000000000002 R09: 0000000000000080
R10: 0000000000000080 R11: ffff810001020b00 R12: ffff81000000b440
R13: ffff81000101ea28 R14: 0000000000000000 R15: 000000000000000e
FS:  00002acae32b3c80(0000) GS:ffff8100011af138(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 00002acae3108150 CR3: 0000000000201000 CR4: 00000000000006e0
Stack:  ffff81001774fd28 ffffffff8020b142 0000000000000000 0000000000000000
 ffff81003ba5ca80 ffff81003b10e938 ffff81003bd46c40 ffff81003b21e188
 ffff81003bbf4790 ffff81003b165128 ffff81003af43958 ffff81003b8c19e0
Call Trace:
 [<ffffffff8020b142>] release_pages+0xdb/0x18a
 [<ffffffff8020e44d>] free_pages_and_swap_cache+0x7b/0x96
 [<ffffffff80207d6d>] unmap_vmas+0x437/0x6ff
 [<ffffffff802396ed>] exit_mmap+0x7a/0xf1
 [<ffffffff8023b8af>] mmput+0x3d/0x8f
 [<ffffffff8023ffe6>] exit_mm+0xe1/0xea
 [<ffffffff8021490a>] do_exit+0x230/0x83d
 [<ffffffff802621ca>] trace_hardirqs_on_thunk+0x35/0x37
 [<ffffffff80247481>] debug_mutex_init+0x0/0x45
 [<ffffffff8024accc>] sys_exit_group+0x12/0x14
 [<ffffffff8025b11e>] system_call+0x7e/0x83
Code: 0f 0b eb fe 48 89 48 08 48 89 01 48 c7 47 08 00 02 20 00 48 


>>RIP; ffffffff803298e4 <list_del+3f/5b>   <=====

>>RBX; ffff81003b531590 <phys_startup_64+ffff81003b331490/ffffffff7fffff00>
>>RCX; ffffffff806096b8 <printk_buf.20305+58/400>
>>RDX; ffff81001c86d100 <phys_startup_64+ffff81001c66d000/ffffffff7fffff00>
>>RBP; ffff81001774fc68 <phys_startup_64+ffff81001754fb68/ffffffff7fffff00>
>>R11; ffff810001020b00 <phys_startup_64+ffff810000e20a00/ffffffff7fffff00>
>>R12; ffff81000000b440 <phys_startup_64+ffff80ffffe0b340/ffffffff7fffff00>
>>R13; ffff81000101ea28 <phys_startup_64+ffff810000e1e928/ffffffff7fffff00>

Trace; ffffffff8020b142 <release_pages+db/18a>
Trace; ffffffff8020e44d <free_pages_and_swap_cache+7b/96>
Trace; ffffffff80207d6d <unmap_vmas+437/6ff>
Trace; ffffffff802396ed <exit_mmap+7a/f1>
Trace; ffffffff8023b8af <mmput+3d/8f>
Trace; ffffffff8023ffe6 <exit_mm+e1/ea>
Trace; ffffffff8021490a <do_exit+230/83d>
Trace; ffffffff802621ca <trace_hardirqs_on_thunk+35/37>
Trace; ffffffff80247481 <debug_mutex_init+0/45>
Trace; ffffffff8024accc <sys_exit_group+12/14>
Trace; ffffffff8025b11e <system_call+7e/83>

Code;  ffffffff803298e4 <list_del+3f/5b>
0000000000000000 <_RIP>:
Code;  ffffffff803298e4 <list_del+3f/5b>   <=====
   0:   0f 0b                     ud2a      <=====
Code;  ffffffff803298e6 <list_del+41/5b>
   2:   eb fe                     jmp    2 <_RIP+0x2>
Code;  ffffffff803298e8 <list_del+43/5b>
   4:   48 89 48 08               mov    %rcx,0x8(%rax)
Code;  ffffffff803298ec <list_del+47/5b>
   8:   48 89 01                  mov    %rax,(%rcx)
Code;  ffffffff803298ef <list_del+4a/5b>
   b:   48 c7 47 08 00 02 20      movq   $0x200200,0x8(%rdi)
Code;  ffffffff803298f6 <list_del+51/5b>
  12:   00 
Code;  ffffffff803298f7 <list_del+52/5b>
  13:   48 00 00                  rex64 add    %al,(%rax)

NMI Watchdog detected LOCKUP on CPU 0
CPU 0 
Pid: 11821, comm: sh Not tainted 2.6.20-rc6 #1
RIP: 0010:[<ffffffff802078be>]  [<ffffffff802078be>] _raw_spin_lock+0x81/0xf9
RSP: 0000:ffff810002317cb8  EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff81000000b700 RCX: 00000000f6a35d61
RDX: 000000000000033a RSI: ffff8100178608c0 RDI: 0000000000000001
RBP: ffff810002317cd8 R08: 0000000000000002 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000006ab296d
R13: 0000000000000001 R14: 0000000077c3cc34 R15: ffff81001dcc6bb8
FS:  00002b12d23036d0(0000) GS:ffffffff80548000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 00000000005be064 CR3: 000000002a9e2000 CR4: 00000000000006e0
Stack:  ffff81000000b700 ffff81000000b440 ffff810001019480 0000000000000000
 ffff810002317cf8 ffffffff80262975 ffff81003b7347d0 ffff81003b498cf0
 ffff810002317d28 ffffffff8020d436 0000000000000012 ffff81003b542cb0
Call Trace:
 [<ffffffff80262975>] _spin_lock_irq+0x33/0x38
 [<ffffffff8020d436>] __pagevec_lru_add_active+0x62/0xdf
 [<ffffffff8020ffa0>] lru_cache_add_active+0x4f/0x51
 [<ffffffff802106f3>] do_wp_page+0x401/0x4aa
 [<ffffffff80208ff9>] __handle_mm_fault+0x96b/0x9e2
 [<ffffffff8020aab5>] do_page_fault+0x364/0x817
 [<ffffffff8020ab74>] do_page_fault+0x423/0x817
 [<ffffffff802629e0>] _spin_unlock_irq+0x2b/0x31
 [<ffffffff802629e0>] _spin_unlock_irq+0x2b/0x31
 [<ffffffff80228ebd>] do_sigaction+0x17a/0x190
 [<ffffffff802621ca>] trace_hardirqs_on_thunk+0x35/0x37
 [<ffffffff80262c8d>] error_exit+0x0/0x96
Code: 7f 55 bf 01 00 00 00 49 ff c4 e8 d2 53 00 00 4d 39 f4 75 e6 


>>RIP; ffffffff802078be <_raw_spin_lock+81/f9>   <=====

>>RBX; ffff81000000b700 <phys_startup_64+ffff80ffffe0b600/ffffffff7fffff00>
>>RCX; 00000000f6a35d61 <phys_startup_64+f6835c61/ffffffff7fffff00>
>>RSI; ffff8100178608c0 <phys_startup_64+ffff8100176607c0/ffffffff7fffff00>
>>RBP; ffff810002317cd8 <phys_startup_64+ffff810002117bd8/ffffffff7fffff00>
>>R12; 0000000006ab296d <phys_startup_64+68b286d/ffffffff7fffff00>
>>R14; 0000000077c3cc34 <phys_startup_64+77a3cb34/ffffffff7fffff00>
>>R15; ffff81001dcc6bb8 <phys_startup_64+ffff81001dac6ab8/ffffffff7fffff00>

Trace; ffffffff80262975 <_spin_lock_irq+33/38>
Trace; ffffffff8020d436 <__pagevec_lru_add_active+62/df>
Trace; ffffffff8020ffa0 <lru_cache_add_active+4f/51>
Trace; ffffffff802106f3 <do_wp_page+401/4aa>
Trace; ffffffff80208ff9 <__handle_mm_fault+96b/9e2>
Trace; ffffffff8020aab5 <do_page_fault+364/817>
Trace; ffffffff8020ab74 <do_page_fault+423/817>
Trace; ffffffff802629e0 <_spin_unlock_irq+2b/31>
Trace; ffffffff802629e0 <_spin_unlock_irq+2b/31>
Trace; ffffffff80228ebd <do_sigaction+17a/190>
Trace; ffffffff802621ca <trace_hardirqs_on_thunk+35/37>
Trace; ffffffff80262c8d <error_exit+0/96>

Code;  ffffffff802078be <_raw_spin_lock+81/f9>
0000000000000000 <_RIP>:
Code;  ffffffff802078be <_raw_spin_lock+81/f9>   <=====
   0:   7f 55                     jg     57 <_RIP+0x57>   <=====
Code;  ffffffff802078c0 <_raw_spin_lock+83/f9>
   2:   bf 01 00 00 00            mov    $0x1,%edi
Code;  ffffffff802078c5 <_raw_spin_lock+88/f9>
   7:   49 ff c4                  inc    %r12
Code;  ffffffff802078c8 <_raw_spin_lock+8b/f9>
   a:   e8 d2 53 00 00            callq  53e1 <_RIP+0x53e1>
Code;  ffffffff802078cd <_raw_spin_lock+90/f9>
   f:   4d 39 f4                  cmp    %r14,%r12
Code;  ffffffff802078d0 <_raw_spin_lock+93/f9>
  12:   75 e6                     jne    fffffffffffffffa <_RIP+0xfffffffffffffffa>

 NMI Watchdog detected LOCKUP on CPU 1
CPU 1 
Pid: 11815, comm: sh Not tainted 2.6.20-rc6 #1
RIP: 0010:[<ffffffff802078b8>]  [<ffffffff802078b8>] _raw_spin_lock+0x7b/0xf9
RSP: 0000:ffff810024e4fcb8  EFLAGS: 00000083
RAX: 000000000000000a RBX: ffff81000000b700 RCX: 00000000f7837878
RDX: 000000000000033d RSI: ffff810024e4fcd8 RDI: 0000000000000001
RBP: ffff810024e4fcd8 R08: 0000000000000002 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000001 R12: 000000000b7745fb
R13: 0000000000000001 R14: 0000000077c3cc34 R15: ffff81000fc4cc80
FS:  00002b7057d366d0(0000) GS:ffff8100011af138(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 00002b7057899398 CR3: 0000000023ebe000 CR4: 00000000000006e0
Stack:  ffff81000000b700 ffff81000000b440 ffff810001022480 0000000000000000
 ffff810024e4fcf8 ffffffff80262975 ffff81003bdc0ea0 ffff81003ba5ca80
 ffff810024e4fd28 ffffffff8020d436 0000000000000012 ffff81003be9b508
Call Trace:
 [<ffffffff80262975>] _spin_lock_irq+0x33/0x38
 [<ffffffff8020d436>] __pagevec_lru_add_active+0x62/0xdf
 [<ffffffff8020ffa0>] lru_cache_add_active+0x4f/0x51
 [<ffffffff802106f3>] do_wp_page+0x401/0x4aa
 [<ffffffff80208ff9>] __handle_mm_fault+0x96b/0x9e2
 [<ffffffff8020aab5>] do_page_fault+0x364/0x817
 [<ffffffff8020ab74>] do_page_fault+0x423/0x817
 [<ffffffff802629e0>] _spin_unlock_irq+0x2b/0x31
 [<ffffffff8025fe30>] thread_return+0x88/0x12d
 [<ffffffff80262c8d>] error_exit+0x0/0x96
Code: 31 c0 87 03 85 c0 7f 55 bf 01 00 00 00 49 ff c4 e8 d2 53 00 


>>RIP; ffffffff802078b8 <_raw_spin_lock+7b/f9>   <=====

>>RBX; ffff81000000b700 <phys_startup_64+ffff80ffffe0b600/ffffffff7fffff00>
>>RCX; 00000000f7837878 <phys_startup_64+f7637778/ffffffff7fffff00>
>>RSI; ffff810024e4fcd8 <phys_startup_64+ffff810024c4fbd8/ffffffff7fffff00>
>>RBP; ffff810024e4fcd8 <phys_startup_64+ffff810024c4fbd8/ffffffff7fffff00>
>>R12; 000000000b7745fb <phys_startup_64+b5744fb/ffffffff7fffff00>
>>R14; 0000000077c3cc34 <phys_startup_64+77a3cb34/ffffffff7fffff00>
>>R15; ffff81000fc4cc80 <phys_startup_64+ffff81000fa4cb80/ffffffff7fffff00>

Trace; ffffffff80262975 <_spin_lock_irq+33/38>
Trace; ffffffff8020d436 <__pagevec_lru_add_active+62/df>
Trace; ffffffff8020ffa0 <lru_cache_add_active+4f/51>
Trace; ffffffff802106f3 <do_wp_page+401/4aa>
Trace; ffffffff80208ff9 <__handle_mm_fault+96b/9e2>
Trace; ffffffff8020aab5 <do_page_fault+364/817>
Trace; ffffffff8020ab74 <do_page_fault+423/817>
Trace; ffffffff802629e0 <_spin_unlock_irq+2b/31>
Trace; ffffffff8025fe30 <thread_return+88/12d>
Trace; ffffffff80262c8d <error_exit+0/96>

Code;  ffffffff802078b8 <_raw_spin_lock+7b/f9>
0000000000000000 <_RIP>:
Code;  ffffffff802078b8 <_raw_spin_lock+7b/f9>   <=====
   0:   31 c0                     xor    %eax,%eax   <=====
Code;  ffffffff802078ba <_raw_spin_lock+7d/f9>
   2:   87 03                     xchg   %eax,(%rbx)
Code;  ffffffff802078bc <_raw_spin_lock+7f/f9>
   4:   85 c0                     test   %eax,%eax
Code;  ffffffff802078be <_raw_spin_lock+81/f9>
   6:   7f 55                     jg     5d <_RIP+0x5d>
Code;  ffffffff802078c0 <_raw_spin_lock+83/f9>
   8:   bf 01 00 00 00            mov    $0x1,%edi
Code;  ffffffff802078c5 <_raw_spin_lock+88/f9>
   d:   49 ff c4                  inc    %r12
Code;  ffffffff802078c8 <_raw_spin_lock+8b/f9>
  10:   e8 d2 53 00 00            callq  53e7 <_RIP+0x53e7>

Call Trace:
 [<ffffffff80262975>] _spin_lock_irq+0x33/0x38
 [<ffffffff8020d436>] __pagevec_lru_add_active+0x62/0xdf
 [<ffffffff80215c6f>] __lru_add_drain+0x49/0x4d
 [<ffffffff8022e562>] lru_add_drain+0x11/0x13
 [<ffffffff8023969a>] exit_mmap+0x27/0xf1
 [<ffffffff8023b8af>] mmput+0x3d/0x8f
 [<ffffffff8023ffe6>] exit_mm+0xe1/0xea
 [<ffffffff8021490a>] do_exit+0x230/0x83d
 [<ffffffff80267306>] sync_regs+0x0/0x71
 [<ffffffff80272c5b>] nmi_watchdog_tick+0x151/0x23b
 [<ffffffff80267e1d>] default_do_nmi+0x83/0x1c8
 [<ffffffff80272d89>] do_nmi+0x44/0x6f
 [<ffffffff80262f7f>] nmi+0x7f/0x80
 [<ffffffff802078be>] _raw_spin_lock+0x81/0xf9
 [<ffffffff8020d436>] __pagevec_lru_add_active+0x62/0xdf
 [<ffffffff8020ffa0>] lru_cache_add_active+0x4f/0x51
 [<ffffffff802106f3>] do_wp_page+0x401/0x4aa
 [<ffffffff80208ff9>] __handle_mm_fault+0x96b/0x9e2
 [<ffffffff8020aab5>] do_page_fault+0x364/0x817
 [<ffffffff8020ab74>] do_page_fault+0x423/0x817
 [<ffffffff802629e0>] _spin_unlock_irq+0x2b/0x31
 [<ffffffff802629e0>] _spin_unlock_irq+0x2b/0x31
 [<ffffffff80228ebd>] do_sigaction+0x17a/0x190
 [<ffffffff802621ca>] trace_hardirqs_on_thunk+0x35/0x37
 [<ffffffff80262c8d>] error_exit+0x0/0x96
Call Trace:
 [<ffffffff80262975>] _spin_lock_irq+0x33/0x38
 [<ffffffff8020d436>] __pagevec_lru_add_active+0x62/0xdf
 [<ffffffff80215c6f>] __lru_add_drain+0x49/0x4d
 [<ffffffff8022e562>] lru_add_drain+0x11/0x13
 [<ffffffff8023969a>] exit_mmap+0x27/0xf1
 [<ffffffff8023b8af>] mmput+0x3d/0x8f
 [<ffffffff8023ffe6>] exit_mm+0xe1/0xea
 [<ffffffff8021490a>] do_exit+0x230/0x83d
 [<ffffffff80267306>] sync_regs+0x0/0x71
 [<ffffffff80272c5b>] nmi_watchdog_tick+0x151/0x23b
 [<ffffffff80267e1d>] default_do_nmi+0x83/0x1c8
 [<ffffffff80272d89>] do_nmi+0x44/0x6f
 [<ffffffff80262f7f>] nmi+0x7f/0x80
 [<ffffffff802078b8>] _raw_spin_lock+0x7b/0xf9
 [<ffffffff8020d436>] __pagevec_lru_add_active+0x62/0xdf
 [<ffffffff8020ffa0>] lru_cache_add_active+0x4f/0x51
 [<ffffffff802106f3>] do_wp_page+0x401/0x4aa
 [<ffffffff80208ff9>] __handle_mm_fault+0x96b/0x9e2
 [<ffffffff8020aab5>] do_page_fault+0x364/0x817
 [<ffffffff8020ab74>] do_page_fault+0x423/0x817
 [<ffffffff802629e0>] _spin_unlock_irq+0x2b/0x31
 [<ffffffff8025fe30>] thread_return+0x88/0x12d
 [<ffffffff80262c8d>] error_exit+0x0/0x96
Warning (Oops_read): Code line not seen, dumping what data is available


Trace; ffffffff80262975 <_spin_lock_irq+33/38>
Trace; ffffffff8020d436 <__pagevec_lru_add_active+62/df>
Trace; ffffffff80215c6f <__lru_add_drain+49/4d>
Trace; ffffffff8022e562 <lru_add_drain+11/13>
Trace; ffffffff8023969a <exit_mmap+27/f1>
Trace; ffffffff8023b8af <mmput+3d/8f>
Trace; ffffffff8023ffe6 <exit_mm+e1/ea>
Trace; ffffffff8021490a <do_exit+230/83d>
Trace; ffffffff80267306 <sync_regs+0/71>
Trace; ffffffff80272c5b <nmi_watchdog_tick+151/23b>
Trace; ffffffff80267e1d <default_do_nmi+83/1c8>
Trace; ffffffff80272d89 <do_nmi+44/6f>
Trace; ffffffff80262f7f <nmi+7f/80>
Trace; ffffffff802078be <_raw_spin_lock+81/f9>
Trace; ffffffff8020d436 <__pagevec_lru_add_active+62/df>
Trace; ffffffff8020ffa0 <lru_cache_add_active+4f/51>
Trace; ffffffff802106f3 <do_wp_page+401/4aa>
Trace; ffffffff80208ff9 <__handle_mm_fault+96b/9e2>
Trace; ffffffff8020aab5 <do_page_fault+364/817>
Trace; ffffffff8020ab74 <do_page_fault+423/817>
Trace; ffffffff802629e0 <_spin_unlock_irq+2b/31>
Trace; ffffffff802629e0 <_spin_unlock_irq+2b/31>
Trace; ffffffff80228ebd <do_sigaction+17a/190>
Trace; ffffffff802621ca <trace_hardirqs_on_thunk+35/37>
Trace; ffffffff80262c8d <error_exit+0/96>
Trace; ffffffff80262975 <_spin_lock_irq+33/38>
Trace; ffffffff8020d436 <__pagevec_lru_add_active+62/df>
Trace; ffffffff80215c6f <__lru_add_drain+49/4d>
Trace; ffffffff8022e562 <lru_add_drain+11/13>
Trace; ffffffff8023969a <exit_mmap+27/f1>
Trace; ffffffff8023b8af <mmput+3d/8f>
Trace; ffffffff8023ffe6 <exit_mm+e1/ea>
Trace; ffffffff8021490a <do_exit+230/83d>
Trace; ffffffff80267306 <sync_regs+0/71>
Trace; ffffffff80272c5b <nmi_watchdog_tick+151/23b>
Trace; ffffffff80267e1d <default_do_nmi+83/1c8>
Trace; ffffffff80272d89 <do_nmi+44/6f>
Trace; ffffffff80262f7f <nmi+7f/80>
Trace; ffffffff802078b8 <_raw_spin_lock+7b/f9>
Trace; ffffffff8020d436 <__pagevec_lru_add_active+62/df>
Trace; ffffffff8020ffa0 <lru_cache_add_active+4f/51>
Trace; ffffffff802106f3 <do_wp_page+401/4aa>
Trace; ffffffff80208ff9 <__handle_mm_fault+96b/9e2>
Trace; ffffffff8020aab5 <do_page_fault+364/817>
Trace; ffffffff8020ab74 <do_page_fault+423/817>
Trace; ffffffff802629e0 <_spin_unlock_irq+2b/31>
Trace; ffffffff8025fe30 <thread_return+88/12d>
Trace; ffffffff80262c8d <error_exit+0/96>

0000:04:08.0: ttyS0 at I/O 0xc880 (irq = 19) is a 16550A
ehci_hcd 0000:00:0b.1: debug port 1
9765511 blocks
lo: Disabled Privacy Extensions

3 warnings and 1 error issued.  Results may not be reliable.

-- 
OpenPGP public key:              http://krystal.dyndns.org:8080/key/compudj.gpg
Key fingerprint:     8CD5 52C3 8E3C 4140 715F  BA06 3F25 A8FE 3BAE 9A68 

^ permalink raw reply	[flat|nested] 4+ messages in thread

* Re: Bug report : reproducible memory bug (hardware failure, sorry)
  2007-01-28 20:25 ` Bug report : reproducible memory allocator bug in 2.6.19.2 Martin J. Bligh
  2007-01-28 21:05   ` Bug report : reproducible memory allocator bug in 2.6.20-rc6 Mathieu Desnoyers
@ 2007-01-30  3:27   ` Mathieu Desnoyers
  2007-01-30  4:33     ` Martin J. Bligh
  1 sibling, 1 reply; 4+ messages in thread
From: Mathieu Desnoyers @ 2007-01-30  3:27 UTC (permalink / raw)
  To: Martin J. Bligh; +Cc: linux-kernel, Andrew Morton, Ingo Molnar

* Martin J. Bligh (mbligh@mbligh.org) wrote:
> Mathieu Desnoyers wrote:
> >Hi,
> >
> >Trying to build cross-compilers (or kernels) on a 2-way x86_64 (amd64) with
> >make -j3 triggers the following OOPS after about 30 minutes on
> >2.6.19.2. Due to the amount of time and the heavy load it takes before it
> >happens, I suspect a race condition. Memtest86 tests passed ok. The
> >amount of swap used when the condition happens is about 52k and stable
> >(only ~800MB/1GB are used).
> >
> >I am going to give it a look, but I suspect you might help narrowing it
> >down more quickly. Any insight would be appreciated.
> 
> Mmm. that's going to be messy to debug ... but didn't we already know
> that kernel was racy? Or is 2.6.19.2 after that fix already? Does 20-rc6
> still break?

Hi Martin,

I finally re-ran memtest86 on the machine since it began to have too
many different kind of errors (GPF, invalid instruction...). It turned
out that one of the memory modules was bad. I guess my brand new 
list_debug race condition debugger will be useful in the future, but not
now. :)

I'll remember to let memtest86 run a few hours more on my new machines
next time.

Mathieu

-- 
OpenPGP public key:              http://krystal.dyndns.org:8080/key/compudj.gpg
Key fingerprint:     8CD5 52C3 8E3C 4140 715F  BA06 3F25 A8FE 3BAE 9A68 

^ permalink raw reply	[flat|nested] 4+ messages in thread

* Re: Bug report : reproducible memory bug (hardware failure, sorry)
  2007-01-30  3:27   ` Bug report : reproducible memory bug (hardware failure, sorry) Mathieu Desnoyers
@ 2007-01-30  4:33     ` Martin J. Bligh
  0 siblings, 0 replies; 4+ messages in thread
From: Martin J. Bligh @ 2007-01-30  4:33 UTC (permalink / raw)
  To: Mathieu Desnoyers; +Cc: linux-kernel, Andrew Morton, Ingo Molnar

> I finally re-ran memtest86 on the machine since it began to have too
> many different kind of errors (GPF, invalid instruction...). It turned
> out that one of the memory modules was bad. I guess my brand new 
> list_debug race condition debugger will be useful in the future, but not
> now. :)
> 
> I'll remember to let memtest86 run a few hours more on my new machines
> next time.

Heh, well that's a lot less confusing at least ;-)

M.

^ permalink raw reply	[flat|nested] 4+ messages in thread

end of thread, other threads:[~2007-01-30  4:33 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
     [not found] <20070128200917.GA16571@Krystal>
2007-01-28 20:25 ` Bug report : reproducible memory allocator bug in 2.6.19.2 Martin J. Bligh
2007-01-28 21:05   ` Bug report : reproducible memory allocator bug in 2.6.20-rc6 Mathieu Desnoyers
2007-01-30  3:27   ` Bug report : reproducible memory bug (hardware failure, sorry) Mathieu Desnoyers
2007-01-30  4:33     ` Martin J. Bligh

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