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* bug or hardware memory error?
@ 2008-12-21 20:05 Keith Chew
  2008-12-21 20:27 ` Willy Tarreau
  0 siblings, 1 reply; 3+ messages in thread
From: Keith Chew @ 2008-12-21 20:05 UTC (permalink / raw)
  To: linux-kernel

Hi

I have been experiencing some occasional errors in bttv using kernel
2.6.20.1, we suspect could either be:
- hardware memory problem
- software memory problem
- IRQ conflict with wireless WIFI driver (zd1211 module below)

Can someone assist by looking at this stack trace:
--------------------------------------------------------
Dec 20 18:28:00 localhost kernel: BUG: unable to handle kernel paging
request at virtual address fdedaf8f
Dec 20 18:28:00 localhost kernel:  printing eip:
Dec 20 18:28:00 localhost kernel: c044667a
Dec 20 18:28:00 localhost kernel: *pde = 00000000
Dec 20 18:28:00 localhost kernel: Oops: 0000 [#1]
Dec 20 18:28:00 localhost kernel: Modules linked in: zd1211 i915 drm
w83627hf hwmon_vid hwmon i2c_isa dm_multipath video dock button
battery ac lp bt878 bttv video_buf ir_common compat_ioctl32
i2c_algo_bit snd_intel8x0 snd_ac97_codec ac97_bus snd_seq_dummy
btcx_risc snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device
snd_pcm_oss snd_mixer_oss tveeprom snd_pcm snd_timer snd soundcore
ieee1394 videodev i2c_i801 pcspkr parport_pc e100 i2c_core
snd_page_alloc v4l2_common parport mii v4l1_compat dm_snapshot dm_zero
dm_mirror dm_mod ata_piix libata sd_mod scsi_mod ext3 jbd ehci_hcd
ohci_hcd
Dec 20 18:28:00 localhost kernel: CPU:    0
Dec 20 18:28:00 localhost kernel: EIP:    0060:[<c044667a>]    Not tainted VLI
Dec 20 18:28:00 localhost kernel: EFLAGS: 00010203   (2.6.20.1 #4)
Dec 20 18:28:00 localhost kernel: EIP is at put_page+0x5/0x83
Dec 20 18:28:00 localhost kernel: eax: fdedaf8f   ebx: fdedaf8f   ecx:
f7fff5c0   edx: c163db40
Dec 20 18:28:00 localhost kernel: esi: 00000002   edi: f7c63210   ebp:
f8a7a1cc   esp: f7335c38
Dec 20 18:28:00 localhost kernel: ds: 007b   es: 007b   ss: 0068
Dec 20 18:28:00 localhost kernel: Process mencoder (pid: 2341,
ti=f7334000 task=f6c1a430 task.ti=f7334000)
Dec 20 18:28:00 localhost kernel: Stack: f1e2eba4 00000002 f7c63210
f8a2633e 00200200 f7c63210 f1e2eba4 f1e2eba4
Dec 20 18:28:00 localhost kernel:        f1e2eb80 f8a63c25 f7c63210
00000002 00000282 f8a7a1cc f8a258bd f7c63210
Dec 20 18:28:00 localhost kernel:        00000000 f7c63200 f8a25949
00000002 f27f2140 f8a5f355 00000282 00000282
Dec 20 18:28:00 localhost kernel: Call Trace:
Dec 20 18:28:00 localhost kernel:  [<f8a2633e>]
videobuf_dma_free+0x49/0x88 [video_buf]
Dec 20 18:28:00 localhost kernel:  [<f8a63c25>] bttv_dma_free+0x3c/0x64 [bttv]
Dec 20 18:28:00 localhost kernel:  [<f8a258bd>]
videobuf_queue_cancel+0x61/0x7a [video_buf]
Dec 20 18:28:00 localhost kernel:  [<f8a25949>]
videobuf_streamoff+0x20/0x36 [video_buf]
Dec 20 18:28:00 localhost kernel:  [<f8a5f355>]
bttv_do_ioctl+0x1367/0x1b86 [bttv]
Dec 20 18:28:00 localhost kernel:  [<f90198b5>]
zd_ReceivePkt+0x1a5/0x420 [zd1211]
Dec 20 18:28:00 localhost kernel:  [<c05678e3>] usb_hcd_submit_urb+0x7ce/0x873
Dec 20 18:28:00 localhost kernel:  [<c0477717>] end_buffer_async_write+0xc7/0xe1
Dec 20 18:28:00 localhost kernel:  [<c0415eb2>] enqueue_task+0x29/0x39
Dec 20 18:28:00 localhost kernel:  [<c04161d8>] __activate_task+0x1c/0x29
Dec 20 18:28:00 localhost kernel:  [<c0416b4a>] try_to_wake_up+0x11c/0x126
Dec 20 18:28:00 localhost kernel:  [<c04158c0>] __wake_up_common+0x32/0x55
Dec 20 18:28:00 localhost kernel:  [<c0457ab1>] free_block+0xbd/0xdc
Dec 20 18:28:00 localhost kernel:  [<c045787d>] cache_flusharray+0x7a/0x9d
Dec 20 18:28:00 localhost kernel:  [<c04cdb6e>] memmove+0xe/0x22
Dec 20 18:28:00 localhost kernel:  [<c05fd7b9>] kprobe_flush_task+0x4b/0x80
Dec 20 18:28:00 localhost kernel:  [<c05fa406>] __sched_text_start+0x54e/0x588
Dec 20 18:28:00 localhost kernel:  [<c0419a37>] release_console_sem+0x181/0x1c0
Dec 20 18:28:00 localhost kernel:  [<c05fa9ed>] schedule_timeout+0x13/0x97
Dec 20 18:28:00 localhost kernel:  [<c042cfb3>] unqueue_me+0x75/0x7d
Dec 20 18:28:00 localhost kernel:  [<f89ae785>]
video_usercopy+0x172/0x237 [videodev]
Dec 20 18:28:00 localhost kernel:  [<c0440ae7>] find_get_page+0x35/0x3a
Dec 20 18:28:00 localhost kernel:  [<c0442ca1>] filemap_nopage+0x159/0x2c6
Dec 20 18:28:00 localhost kernel:  [<c0416b54>] default_wake_function+0x0/0xc
Dec 20 18:28:00 localhost kernel:  [<f8a5bfa7>] bttv_ioctl+0x42/0x47 [bttv]
Dec 20 18:28:00 localhost kernel:  [<f8a5dfee>] bttv_do_ioctl+0x0/0x1b86 [bttv]
Dec 20 18:28:00 localhost kernel:  [<f8a5bf65>] bttv_ioctl+0x0/0x47 [bttv]
Dec 20 18:28:00 localhost kernel:  [<c0464ef2>] do_ioctl+0x3e/0x4d
Dec 20 18:28:00 localhost kernel:  [<c0465100>] vfs_ioctl+0x1ff/0x216
Dec 20 18:28:00 localhost kernel:  [<c0465163>] sys_ioctl+0x4c/0x65
Dec 20 18:28:00 localhost kernel:  [<c0403bda>] sysenter_past_esp+0x5f/0x85
Dec 20 18:28:00 localhost kernel:  =======================
Dec 20 18:28:00 localhost kernel: Code: 97 e8 00 00 00 89 d8 e8 42 8a
08 00 ff 87 00 01 00 00 ff 05 60 c6 77 c0 8d 87 d8 00 00 00 5b 5e 5f
e9 53 52 1b 00 57 56 53 89 c3 <8b> 00 f6 c4 40 74 0a 89 d8 5b 5e 5f e9
f1 fc ff ff ff 4b 04 0f
Dec 20 18:28:00 localhost kernel: EIP: [<c044667a>] put_page+0x5/0x83
SS:ESP 0068:f7335c38
Dec 20 18:28:00 localhost kernel:  <3>BUG: sleeping function called
from invalid context at kernel/rwsem.c:20
Dec 20 18:28:00 localhost kernel: in_atomic():0, irqs_disabled():1
Dec 20 18:28:00 localhost kernel:  [<c042be67>] down_read+0x12/0x1f
Dec 20 18:28:00 localhost kernel:  [<c0436761>] acct_collect+0x38/0x13f
Dec 20 18:28:00 localhost kernel:  [<c041bd32>] do_exit+0x1a6/0x704
Dec 20 18:28:00 localhost kernel:  [<c041a064>] printk+0x1b/0x1f
Dec 20 18:28:00 localhost kernel:  [<c0404f65>] die+0x1dd/0x202
Dec 20 18:28:00 localhost kernel:  [<c05fcf00>] do_page_fault+0x3fe/0x4d1
Dec 20 18:28:00 localhost kernel:  [<c05fcb02>] do_page_fault+0x0/0x4d1
Dec 20 18:28:00 localhost kernel:  [<c05fb984>] error_code+0x74/0x7c
Dec 20 18:28:00 localhost kernel:  [<c044667a>] put_page+0x5/0x83
Dec 20 18:28:00 localhost kernel:  [<f8a2633e>]
videobuf_dma_free+0x49/0x88 [video_buf]
Dec 20 18:28:00 localhost kernel:  [<f8a63c25>] bttv_dma_free+0x3c/0x64 [bttv]
Dec 20 18:28:00 localhost kernel:  [<f8a258bd>]
videobuf_queue_cancel+0x61/0x7a [video_buf]
Dec 20 18:28:00 localhost kernel:  [<f8a25949>]
videobuf_streamoff+0x20/0x36 [video_buf]
Dec 20 18:28:00 localhost kernel:  [<f8a5f355>]
bttv_do_ioctl+0x1367/0x1b86 [bttv]
Dec 20 18:28:00 localhost kernel:  [<f90198b5>]
zd_ReceivePkt+0x1a5/0x420 [zd1211]
Dec 20 18:28:00 localhost kernel:  [<c05678e3>] usb_hcd_submit_urb+0x7ce/0x873
Dec 20 18:28:00 localhost kernel:  [<c0477717>] end_buffer_async_write+0xc7/0xe1
Dec 20 18:28:00 localhost kernel:  [<c0415eb2>] enqueue_task+0x29/0x39
Dec 20 18:28:00 localhost kernel:  [<c04161d8>] __activate_task+0x1c/0x29
Dec 20 18:28:00 localhost kernel:  [<c0416b4a>] try_to_wake_up+0x11c/0x126
Dec 20 18:28:00 localhost kernel:  [<c04158c0>] __wake_up_common+0x32/0x55
Dec 20 18:28:00 localhost kernel:  [<c0457ab1>] free_block+0xbd/0xdc
Dec 20 18:28:00 localhost kernel:  [<c045787d>] cache_flusharray+0x7a/0x9d
Dec 20 18:28:00 localhost kernel:  [<c04cdb6e>] memmove+0xe/0x22
Dec 20 18:28:00 localhost kernel:  [<c05fd7b9>] kprobe_flush_task+0x4b/0x80
Dec 20 18:28:00 localhost kernel:  [<c05fa406>] __sched_text_start+0x54e/0x588
Dec 20 18:28:00 localhost kernel:  [<c0419a37>] release_console_sem+0x181/0x1c0
Dec 20 18:28:00 localhost kernel:  [<c05fa9ed>] schedule_timeout+0x13/0x97
Dec 20 18:28:00 localhost kernel:  [<c042cfb3>] unqueue_me+0x75/0x7d
Dec 20 18:28:00 localhost kernel:  [<f89ae785>]
video_usercopy+0x172/0x237 [videodev]
Dec 20 18:28:00 localhost kernel:  [<c0440ae7>] find_get_page+0x35/0x3a
Dec 20 18:28:00 localhost kernel:  [<c0442ca1>] filemap_nopage+0x159/0x2c6
Dec 20 18:28:00 localhost kernel:  [<c0416b54>] default_wake_function+0x0/0xc
Dec 20 18:28:00 localhost kernel:  [<f8a5bfa7>] bttv_ioctl+0x42/0x47 [bttv]
Dec 20 18:28:00 localhost kernel:  [<f8a5dfee>] bttv_do_ioctl+0x0/0x1b86 [bttv]
Dec 20 18:28:00 localhost kernel:  [<f8a5bf65>] bttv_ioctl+0x0/0x47 [bttv]
Dec 20 18:28:00 localhost kernel:  [<c0464ef2>] do_ioctl+0x3e/0x4d
Dec 20 18:28:00 localhost kernel:  [<c0465100>] vfs_ioctl+0x1ff/0x216
Dec 20 18:28:01 localhost kernel:  [<c0465163>] sys_ioctl+0x4c/0x65
Dec 20 18:28:01 localhost kernel:  [<c0403bda>] sysenter_past_esp+0x5f/0x85
Dec 20 18:28:01 localhost kernel:  =======================
--------------------------------------------------------

Quite often, we see this in the logs, but the above is the first stack
trace that we manage to capture:
--------------------------------------------------------
Dec 20 18:25:48 localhost kernel: bttv3: IRQ lockup, cleared int mask
[bits: FMTCHG* VSYNC* HSYNC* OFLOW* HLOCK* VPRES* 6* 7* I2CDONE*
GPINT* 10* RISCI* FBUS* FTRGT* FDSR* PPERR* RIPERR* PABORT* OCERR*
SCERR*]
Dec 20 18:25:48 localhost kernel: bttv3: SCERROCERR @ 36df303c,bits:
FMTCHG* VSYNC* HSYNC* OFLOW* HLOCK* VPRES* 6* 7* I2CDONE* GPINT* 10*
RISCI* FBUS* FTRGT* FDSR* PPERR* RIPERR* PABORT* OCERR* SCERR*
Dec 20 18:25:48 localhost kernel: bttv3: IRQ lockup, cleared int mask
[bits: FMTCHG* VSYNC* HSYNC* OFLOW* HLOCK* VPRES* 6* 7* I2CDONE*
GPINT* 10* RISCI* FBUS* FTRGT* FDSR* PPERR* RIPERR* PABORT* OCERR*
SCERR*]
Dec 20 18:25:48 localhost kernel: bttv3: IRQ lockup, cleared int mask
[bits: HSYNC* OFLOW*]
Dec 20 18:25:48 localhost kernel: bttv3: timeout: drop=0
irq=2177037/2571854, risc=36df301c, bits: VSYNC HSYNC OFLOW RISCI
Dec 20 18:25:48 localhost kernel: bttv3: reset, reinitialize
Dec 20 18:25:48 localhost kernel: bttv3: PLL: 28636363 => 35468950 . ok
--------------------------------------------------------

Regards
Keith

^ permalink raw reply	[flat|nested] 3+ messages in thread
* Re: bug or hardware memory error?
  2008-12-21 20:05 bug or hardware memory error? Keith Chew
@ 2008-12-21 20:27 ` Willy Tarreau
  2008-12-21 23:15   ` Keith Chew
  0 siblings, 1 reply; 3+ messages in thread
From: Willy Tarreau @ 2008-12-21 20:27 UTC (permalink / raw)
  To: Keith Chew; +Cc: linux-kernel

Hi,

On Mon, Dec 22, 2008 at 09:05:58AM +1300, Keith Chew wrote:
> Hi
> 
> I have been experiencing some occasional errors in bttv using kernel
> 2.6.20.1, we suspect could either be:
> - hardware memory problem
> - software memory problem
> - IRQ conflict with wireless WIFI driver (zd1211 module below)

well, it could be any. 2.6.20.1 is very old, even for the 2.6.20 branch.
A few hundreds of bugs have been fixed since. If you don't need to stick
to 2.6.20, you should try 2.6.27.10. If you need to stick to 2.6.20 for
whatever reason, please at least try with 2.6.20.21 (the latest 2.6.20
patch). Even with that, there's no guarantee that the present bug will
be fixed though.

> Can someone assist by looking at this stack trace:
> --------------------------------------------------------
> Dec 20 18:28:00 localhost kernel: BUG: unable to handle kernel paging
> request at virtual address fdedaf8f
> Dec 20 18:28:00 localhost kernel:  printing eip:
> Dec 20 18:28:00 localhost kernel: c044667a
> Dec 20 18:28:00 localhost kernel: *pde = 00000000
> Dec 20 18:28:00 localhost kernel: Oops: 0000 [#1]
> Dec 20 18:28:00 localhost kernel: Modules linked in: zd1211 i915 drm
> w83627hf hwmon_vid hwmon i2c_isa dm_multipath video dock button
> battery ac lp bt878 bttv video_buf ir_common compat_ioctl32
> i2c_algo_bit snd_intel8x0 snd_ac97_codec ac97_bus snd_seq_dummy
> btcx_risc snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device
> snd_pcm_oss snd_mixer_oss tveeprom snd_pcm snd_timer snd soundcore
> ieee1394 videodev i2c_i801 pcspkr parport_pc e100 i2c_core
> snd_page_alloc v4l2_common parport mii v4l1_compat dm_snapshot dm_zero
> dm_mirror dm_mod ata_piix libata sd_mod scsi_mod ext3 jbd ehci_hcd
> ohci_hcd
> Dec 20 18:28:00 localhost kernel: CPU:    0
> Dec 20 18:28:00 localhost kernel: EIP:    0060:[<c044667a>]    Not tainted VLI
> Dec 20 18:28:00 localhost kernel: EFLAGS: 00010203   (2.6.20.1 #4)
> Dec 20 18:28:00 localhost kernel: EIP is at put_page+0x5/0x83
> Dec 20 18:28:00 localhost kernel: eax: fdedaf8f   ebx: fdedaf8f   ecx:
> f7fff5c0   edx: c163db40
> Dec 20 18:28:00 localhost kernel: esi: 00000002   edi: f7c63210   ebp:
> f8a7a1cc   esp: f7335c38
> Dec 20 18:28:00 localhost kernel: ds: 007b   es: 007b   ss: 0068
> Dec 20 18:28:00 localhost kernel: Process mencoder (pid: 2341,
> ti=f7334000 task=f6c1a430 task.ti=f7334000)
> Dec 20 18:28:00 localhost kernel: Stack: f1e2eba4 00000002 f7c63210
> f8a2633e 00200200 f7c63210 f1e2eba4 f1e2eba4
> Dec 20 18:28:00 localhost kernel:        f1e2eb80 f8a63c25 f7c63210
> 00000002 00000282 f8a7a1cc f8a258bd f7c63210
> Dec 20 18:28:00 localhost kernel:        00000000 f7c63200 f8a25949
> 00000002 f27f2140 f8a5f355 00000282 00000282
> Dec 20 18:28:00 localhost kernel: Call Trace:
> Dec 20 18:28:00 localhost kernel:  [<f8a2633e>]
> videobuf_dma_free+0x49/0x88 [video_buf]
> Dec 20 18:28:00 localhost kernel:  [<f8a63c25>] bttv_dma_free+0x3c/0x64 [bttv]
> Dec 20 18:28:00 localhost kernel:  [<f8a258bd>]
> videobuf_queue_cancel+0x61/0x7a [video_buf]
> Dec 20 18:28:00 localhost kernel:  [<f8a25949>]
> videobuf_streamoff+0x20/0x36 [video_buf]
> Dec 20 18:28:00 localhost kernel:  [<f8a5f355>]
> bttv_do_ioctl+0x1367/0x1b86 [bttv]
> Dec 20 18:28:00 localhost kernel:  [<f90198b5>]
> zd_ReceivePkt+0x1a5/0x420 [zd1211]
> Dec 20 18:28:00 localhost kernel:  [<c05678e3>] usb_hcd_submit_urb+0x7ce/0x873
> Dec 20 18:28:00 localhost kernel:  [<c0477717>] end_buffer_async_write+0xc7/0xe1
> Dec 20 18:28:00 localhost kernel:  [<c0415eb2>] enqueue_task+0x29/0x39
> Dec 20 18:28:00 localhost kernel:  [<c04161d8>] __activate_task+0x1c/0x29
> Dec 20 18:28:00 localhost kernel:  [<c0416b4a>] try_to_wake_up+0x11c/0x126
> Dec 20 18:28:00 localhost kernel:  [<c04158c0>] __wake_up_common+0x32/0x55
> Dec 20 18:28:00 localhost kernel:  [<c0457ab1>] free_block+0xbd/0xdc
> Dec 20 18:28:00 localhost kernel:  [<c045787d>] cache_flusharray+0x7a/0x9d
> Dec 20 18:28:00 localhost kernel:  [<c04cdb6e>] memmove+0xe/0x22
> Dec 20 18:28:00 localhost kernel:  [<c05fd7b9>] kprobe_flush_task+0x4b/0x80
> Dec 20 18:28:00 localhost kernel:  [<c05fa406>] __sched_text_start+0x54e/0x588
> Dec 20 18:28:00 localhost kernel:  [<c0419a37>] release_console_sem+0x181/0x1c0
> Dec 20 18:28:00 localhost kernel:  [<c05fa9ed>] schedule_timeout+0x13/0x97
> Dec 20 18:28:00 localhost kernel:  [<c042cfb3>] unqueue_me+0x75/0x7d
> Dec 20 18:28:00 localhost kernel:  [<f89ae785>]
> video_usercopy+0x172/0x237 [videodev]
> Dec 20 18:28:00 localhost kernel:  [<c0440ae7>] find_get_page+0x35/0x3a
> Dec 20 18:28:00 localhost kernel:  [<c0442ca1>] filemap_nopage+0x159/0x2c6
> Dec 20 18:28:00 localhost kernel:  [<c0416b54>] default_wake_function+0x0/0xc
> Dec 20 18:28:00 localhost kernel:  [<f8a5bfa7>] bttv_ioctl+0x42/0x47 [bttv]
> Dec 20 18:28:00 localhost kernel:  [<f8a5dfee>] bttv_do_ioctl+0x0/0x1b86 [bttv]
> Dec 20 18:28:00 localhost kernel:  [<f8a5bf65>] bttv_ioctl+0x0/0x47 [bttv]
> Dec 20 18:28:00 localhost kernel:  [<c0464ef2>] do_ioctl+0x3e/0x4d
> Dec 20 18:28:00 localhost kernel:  [<c0465100>] vfs_ioctl+0x1ff/0x216
> Dec 20 18:28:00 localhost kernel:  [<c0465163>] sys_ioctl+0x4c/0x65
> Dec 20 18:28:00 localhost kernel:  [<c0403bda>] sysenter_past_esp+0x5f/0x85
> Dec 20 18:28:00 localhost kernel:  =======================
> Dec 20 18:28:00 localhost kernel: Code: 97 e8 00 00 00 89 d8 e8 42 8a
> 08 00 ff 87 00 01 00 00 ff 05 60 c6 77 c0 8d 87 d8 00 00 00 5b 5e 5f
> e9 53 52 1b 00 57 56 53 89 c3 <8b> 00 f6 c4 40 74 0a 89 d8 5b 5e 5f e9
> f1 fc ff ff ff 4b 04 0f
> Dec 20 18:28:00 localhost kernel: EIP: [<c044667a>] put_page+0x5/0x83
> SS:ESP 0068:f7335c38
> Dec 20 18:28:00 localhost kernel:  <3>BUG: sleeping function called
> from invalid context at kernel/rwsem.c:20
> Dec 20 18:28:00 localhost kernel: in_atomic():0, irqs_disabled():1
> Dec 20 18:28:00 localhost kernel:  [<c042be67>] down_read+0x12/0x1f
> Dec 20 18:28:00 localhost kernel:  [<c0436761>] acct_collect+0x38/0x13f
> Dec 20 18:28:00 localhost kernel:  [<c041bd32>] do_exit+0x1a6/0x704
> Dec 20 18:28:00 localhost kernel:  [<c041a064>] printk+0x1b/0x1f
> Dec 20 18:28:00 localhost kernel:  [<c0404f65>] die+0x1dd/0x202
> Dec 20 18:28:00 localhost kernel:  [<c05fcf00>] do_page_fault+0x3fe/0x4d1
> Dec 20 18:28:00 localhost kernel:  [<c05fcb02>] do_page_fault+0x0/0x4d1
> Dec 20 18:28:00 localhost kernel:  [<c05fb984>] error_code+0x74/0x7c
> Dec 20 18:28:00 localhost kernel:  [<c044667a>] put_page+0x5/0x83
> Dec 20 18:28:00 localhost kernel:  [<f8a2633e>]
> videobuf_dma_free+0x49/0x88 [video_buf]
> Dec 20 18:28:00 localhost kernel:  [<f8a63c25>] bttv_dma_free+0x3c/0x64 [bttv]
> Dec 20 18:28:00 localhost kernel:  [<f8a258bd>]
> videobuf_queue_cancel+0x61/0x7a [video_buf]
> Dec 20 18:28:00 localhost kernel:  [<f8a25949>]
> videobuf_streamoff+0x20/0x36 [video_buf]
> Dec 20 18:28:00 localhost kernel:  [<f8a5f355>]
> bttv_do_ioctl+0x1367/0x1b86 [bttv]
> Dec 20 18:28:00 localhost kernel:  [<f90198b5>]
> zd_ReceivePkt+0x1a5/0x420 [zd1211]
> Dec 20 18:28:00 localhost kernel:  [<c05678e3>] usb_hcd_submit_urb+0x7ce/0x873
> Dec 20 18:28:00 localhost kernel:  [<c0477717>] end_buffer_async_write+0xc7/0xe1
> Dec 20 18:28:00 localhost kernel:  [<c0415eb2>] enqueue_task+0x29/0x39
> Dec 20 18:28:00 localhost kernel:  [<c04161d8>] __activate_task+0x1c/0x29
> Dec 20 18:28:00 localhost kernel:  [<c0416b4a>] try_to_wake_up+0x11c/0x126
> Dec 20 18:28:00 localhost kernel:  [<c04158c0>] __wake_up_common+0x32/0x55
> Dec 20 18:28:00 localhost kernel:  [<c0457ab1>] free_block+0xbd/0xdc
> Dec 20 18:28:00 localhost kernel:  [<c045787d>] cache_flusharray+0x7a/0x9d
> Dec 20 18:28:00 localhost kernel:  [<c04cdb6e>] memmove+0xe/0x22
> Dec 20 18:28:00 localhost kernel:  [<c05fd7b9>] kprobe_flush_task+0x4b/0x80
> Dec 20 18:28:00 localhost kernel:  [<c05fa406>] __sched_text_start+0x54e/0x588
> Dec 20 18:28:00 localhost kernel:  [<c0419a37>] release_console_sem+0x181/0x1c0
> Dec 20 18:28:00 localhost kernel:  [<c05fa9ed>] schedule_timeout+0x13/0x97
> Dec 20 18:28:00 localhost kernel:  [<c042cfb3>] unqueue_me+0x75/0x7d
> Dec 20 18:28:00 localhost kernel:  [<f89ae785>]
> video_usercopy+0x172/0x237 [videodev]
> Dec 20 18:28:00 localhost kernel:  [<c0440ae7>] find_get_page+0x35/0x3a
> Dec 20 18:28:00 localhost kernel:  [<c0442ca1>] filemap_nopage+0x159/0x2c6
> Dec 20 18:28:00 localhost kernel:  [<c0416b54>] default_wake_function+0x0/0xc
> Dec 20 18:28:00 localhost kernel:  [<f8a5bfa7>] bttv_ioctl+0x42/0x47 [bttv]
> Dec 20 18:28:00 localhost kernel:  [<f8a5dfee>] bttv_do_ioctl+0x0/0x1b86 [bttv]
> Dec 20 18:28:00 localhost kernel:  [<f8a5bf65>] bttv_ioctl+0x0/0x47 [bttv]
> Dec 20 18:28:00 localhost kernel:  [<c0464ef2>] do_ioctl+0x3e/0x4d
> Dec 20 18:28:00 localhost kernel:  [<c0465100>] vfs_ioctl+0x1ff/0x216
> Dec 20 18:28:01 localhost kernel:  [<c0465163>] sys_ioctl+0x4c/0x65
> Dec 20 18:28:01 localhost kernel:  [<c0403bda>] sysenter_past_esp+0x5f/0x85
> Dec 20 18:28:01 localhost kernel:  =======================
> --------------------------------------------------------
> 
> Quite often, we see this in the logs, but the above is the first stack
> trace that we manage to capture:
> --------------------------------------------------------
> Dec 20 18:25:48 localhost kernel: bttv3: IRQ lockup, cleared int mask
> [bits: FMTCHG* VSYNC* HSYNC* OFLOW* HLOCK* VPRES* 6* 7* I2CDONE*
> GPINT* 10* RISCI* FBUS* FTRGT* FDSR* PPERR* RIPERR* PABORT* OCERR*
> SCERR*]
> Dec 20 18:25:48 localhost kernel: bttv3: SCERROCERR @ 36df303c,bits:
> FMTCHG* VSYNC* HSYNC* OFLOW* HLOCK* VPRES* 6* 7* I2CDONE* GPINT* 10*
> RISCI* FBUS* FTRGT* FDSR* PPERR* RIPERR* PABORT* OCERR* SCERR*
> Dec 20 18:25:48 localhost kernel: bttv3: IRQ lockup, cleared int mask
> [bits: FMTCHG* VSYNC* HSYNC* OFLOW* HLOCK* VPRES* 6* 7* I2CDONE*
> GPINT* 10* RISCI* FBUS* FTRGT* FDSR* PPERR* RIPERR* PABORT* OCERR*
> SCERR*]
> Dec 20 18:25:48 localhost kernel: bttv3: IRQ lockup, cleared int mask
> [bits: HSYNC* OFLOW*]
> Dec 20 18:25:48 localhost kernel: bttv3: timeout: drop=0
> irq=2177037/2571854, risc=36df301c, bits: VSYNC HSYNC OFLOW RISCI
> Dec 20 18:25:48 localhost kernel: bttv3: reset, reinitialize
> Dec 20 18:25:48 localhost kernel: bttv3: PLL: 28636363 => 35468950 . ok
> --------------------------------------------------------
> 
> Regards
> Keith

Willy


^ permalink raw reply	[flat|nested] 3+ messages in thread
* Re: bug or hardware memory error?
  2008-12-21 20:27 ` Willy Tarreau
@ 2008-12-21 23:15   ` Keith Chew
  0 siblings, 0 replies; 3+ messages in thread
From: Keith Chew @ 2008-12-21 23:15 UTC (permalink / raw)
  To: linux-kernel

Hi Willy

> well, it could be any. 2.6.20.1 is very old, even for the 2.6.20 branch.
> A few hundreds of bugs have been fixed since. If you don't need to stick
> to 2.6.20, you should try 2.6.27.10. If you need to stick to 2.6.20 for
> whatever reason, please at least try with 2.6.20.21 (the latest 2.6.20
> patch). Even with that, there's no guarantee that the present bug will
> be fixed though.
>

Ok, will try the latest kernel to see if that fixes it. 2.6.20.1 was
actually the latest kernel when I rolled it out to these machines. The
IRQ Lockup messages have never caused any problems to the the
application, but only recently I caught the stack trace. Of course I
may have missed catching these stack traces in the past, but they are
rare.

Thanks again for your input.

Regards
Keith

^ permalink raw reply	[flat|nested] 3+ messages in thread
end of thread, other threads:[~2008-12-21 23:15 UTC | newest]

Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2008-12-21 20:05 bug or hardware memory error? Keith Chew
2008-12-21 20:27 ` Willy Tarreau
2008-12-21 23:15   ` Keith Chew

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