Re: 2.6.17-rc5-mm1

From: Laurent Riffard
Date: Mon Jun 05 2006 - 12:11:37 EST

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In reply to: Laurent Riffard: "Re: 2.6.17-rc5-mm1"
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Le 05.06.2006 12:32, Laurent Riffard a écrit :
> Le 05.06.2006 03:10, Andrew Morton a écrit :
>> On Sun, 4 Jun 2006 20:59:50 -0400
>> Chuck Ebbert <76306.1226@xxxxxxxxxxxxxx> wrote:
>>
>>> In-Reply-To: <44833955.9000104@xxxxxxx>
>>>
>>> On Sun, 04 Jun 2006 21:49:41 +0200, Laurent Riffard wrote:
>>>
>>>>> Something strange is happening with the stack. Can you try with 8K stacks?
>>>>>
>>>>> kernel hacking --->
>>>>> [ ] Use 4Kb for kernel stacks instead of 8Kb
>>>>>
>>>> Good catch!
>>> Jan Beulich was the one who noticed the stack overflow.
>>>
>>>> I just tried with 2.6.17-rc5-mm3. The BUG still happens with 4K stacks,
>>>> but the system runs fine with 8K stacks.
>>> Can you try -mm3 with "check for stack overflows" and 4k stacks?
>> Maybe we could modify the check-for-stack-overflows code with 8k stacks to
>> be "check for overflows which would kill a 4k stack kernel". By decreasing
>> the thresholds to 3k (say).
>>
>>>> Another info: the system is able to run fine with the following scenario,
>>>> even with 4K stack:
>>>> - boot to runlevel 1
>>>> - load pktcdvd (modprobe + pktsetup)
>>>> - then go to runlevel 5
>>>> It fails if pktcdvd is loaded at runlevel 2 or higher.
>>> I have no idea why that would happen.
>> I'd be surprised if it has to do with the packet code - more likely someone
>> screwed something up in the lockdep/genirq/unwind area and the kernel went
>> recursive.
>>
>> I tried it here, couldn't reproduce it. Laurent, can you (re?)send the
>> offending .config?
>
> .config is attached
>
> I run a few additional tests:
>
> - 2.6.17-rc5-mm3 + CONFIG_DEBUG_STACKOVERFLOW=y,
> CONFIG_DEBUG_STACK_USAGE=y, CONFIG_4KSTACKS=y:
>
> system freezes right after typing "pktsetup test /dev/dvd".
> No stack trace printed.
>
> - Same config as above + lockdep-combo-2.6.17-rc5-mm3.patch +
> lockdep-tracer-2.6.17-rc5-mm3.patch:
>
> Random Oops (recursive dies) on early boot. I sometimes succeded on
> booting but the system dies on "pktsetup test /dev/dvd". I can't get a full
> trace since I don't have my second box here for some days. I tried to boot
> with vga=791, but system hangs with a blank screen.

Here is a bunch of message I got with 2.6.17-rc5-mm3-lockdep with 8K
stack and CONFIG_DEBUG_STACK_USAGE=y. It happens when I start pktcdvd.

Does it give any hints ?

cdrom: This disc doesn't have any tracks I recognize!
pktcdvd: writer pktcdvd0 mapped to hdc
----------------------------->
| new stack fill maximum: vol_id/2233, 3696 bytes (out of 8136 bytes).
| Stack fill ratio: 45% - that's still OK, no need to report this.
------------|
{ 20} [<c013ba14>] debug_stackoverflow+0x80/0xae
{ 28} [<c013cbb6>] __mcount+0x2a/0x97
{ 20} [<c010e434>] mcount+0x14/0x18
{ 304} [<c0238c28>] ide_do_drive_cmd+0x11/0x16c
{ 100} [<e0e553aa>] cdrom_queue_packet_command+0x45/0xd8
{ 204} [<e0e559e1>] cdrom_check_status+0x58/0x60
{ 88} [<e0e55a57>] ide_cdrom_drive_status+0x2a/0x99
{ 376} [<e0c8a84b>] cdrom_open+0x7b/0x7ef
{ 32} [<e0e54756>] idecd_open+0x8a/0xbd
{ 564} [<c016297c>] do_open+0x2db/0x3d4
{ 568} [<c0162ad7>] blkdev_get+0x62/0x6a
{ 564} [<e0ecb370>] pkt_open+0x92/0xbe2
{ 564} [<c0162747>] do_open+0xa6/0x3d4
{ 36} [<c0162c31>] blkdev_open+0x28/0x57
{ 28} [<c0159c47>] __dentry_open+0xb8/0x192
{ 32} [<c0159d9b>] nameidata_to_filp+0x25/0x3a
{ 92} [<c0159de9>] do_filp_open+0x39/0x42
{ 44} [<c015add2>] do_sys_open+0x45/0xc0
{ 24} [<c015ae80>] sys_open+0x18/0x1a
{=3688} [<c02a87ba>] sysenter_past_esp+0x63/0xa1
<---------------------------

----------------------------->
| new stack fill maximum: vol_id/2233, 3720 bytes (out of 8136 bytes).
| Stack fill ratio: 45% - that's still OK, no need to report this.
------------|
{ 20} [<c013ba14>] debug_stackoverflow+0x80/0xae
{ 28} [<c013cbb6>] __mcount+0x2a/0x97
{ 20} [<c010e434>] mcount+0x14/0x18
{ 12} [<c01c6714>] memset+0x9/0x1d
{ 316} [<c0238c4a>] ide_do_drive_cmd+0x33/0x16c
{ 100} [<e0e553aa>] cdrom_queue_packet_command+0x45/0xd8
{ 204} [<e0e559e1>] cdrom_check_status+0x58/0x60
{ 88} [<e0e55a57>] ide_cdrom_drive_status+0x2a/0x99
{ 376} [<e0c8a84b>] cdrom_open+0x7b/0x7ef
{ 32} [<e0e54756>] idecd_open+0x8a/0xbd
{ 564} [<c016297c>] do_open+0x2db/0x3d4
{ 568} [<c0162ad7>] blkdev_get+0x62/0x6a
{ 564} [<e0ecb370>] pkt_open+0x92/0xbe2
{ 564} [<c0162747>] do_open+0xa6/0x3d4
{ 36} [<c0162c31>] blkdev_open+0x28/0x57
{ 28} [<c0159c47>] __dentry_open+0xb8/0x192
{ 32} [<c0159d9b>] nameidata_to_filp+0x25/0x3a
{ 92} [<c0159de9>] do_filp_open+0x39/0x42
{ 44} [<c015add2>] do_sys_open+0x45/0xc0
{ 24} [<c015ae80>] sys_open+0x18/0x1a
{=3712} [<c02a87ba>] sysenter_past_esp+0x63/0xa1
<---------------------------

----------------------------->
| new stack fill maximum: vol_id/2233, 3736 bytes (out of 8136 bytes).
| Stack fill ratio: 45% - that's still OK, no need to report this.
------------|
{ 20} [<c013ba14>] debug_stackoverflow+0x80/0xae
{ 28} [<c013cbb6>] __mcount+0x2a/0x97
{ 20} [<c010e434>] mcount+0x14/0x18
{ 16} [<c01c6696>] memcpy+0xa/0x44
{ 328} [<c0238c5c>] ide_do_drive_cmd+0x45/0x16c
{ 100} [<e0e553aa>] cdrom_queue_packet_command+0x45/0xd8
{ 204} [<e0e559e1>] cdrom_check_status+0x58/0x60
{ 88} [<e0e55a57>] ide_cdrom_drive_status+0x2a/0x99
{ 376} [<e0c8a84b>] cdrom_open+0x7b/0x7ef
{ 32} [<e0e54756>] idecd_open+0x8a/0xbd
{ 564} [<c016297c>] do_open+0x2db/0x3d4
{ 568} [<c0162ad7>] blkdev_get+0x62/0x6a
{ 564} [<e0ecb370>] pkt_open+0x92/0xbe2
{ 564} [<c0162747>] do_open+0xa6/0x3d4
{ 36} [<c0162c31>] blkdev_open+0x28/0x57
{ 28} [<c0159c47>] __dentry_open+0xb8/0x192
{ 32} [<c0159d9b>] nameidata_to_filp+0x25/0x3a
{ 92} [<c0159de9>] do_filp_open+0x39/0x42
{ 44} [<c015add2>] do_sys_open+0x45/0xc0
{ 24} [<c015ae80>] sys_open+0x18/0x1a
{=3728} [<c02a87ba>] sysenter_past_esp+0x63/0xa1
<---------------------------

----------------------------->
| new stack fill maximum: vol_id/2233, 3744 bytes (out of 8136 bytes).
| Stack fill ratio: 46% - that's still OK, no need to report this.
------------|
{ 20} [<c013ba14>] debug_stackoverflow+0x80/0xae
{ 28} [<c013cbb6>] __mcount+0x2a/0x97
{ 20} [<c010e434>] mcount+0x14/0x18
{ 12} [<c01c6714>] memset+0x9/0x1d
{ 340} [<c0238c66>] ide_do_drive_cmd+0x4f/0x16c
{ 100} [<e0e553aa>] cdrom_queue_packet_command+0x45/0xd8
{ 204} [<e0e559e1>] cdrom_check_status+0x58/0x60
{ 88} [<e0e55a57>] ide_cdrom_drive_status+0x2a/0x99
{ 376} [<e0c8a84b>] cdrom_open+0x7b/0x7ef
{ 32} [<e0e54756>] idecd_open+0x8a/0xbd
{ 564} [<c016297c>] do_open+0x2db/0x3d4
{ 568} [<c0162ad7>] blkdev_get+0x62/0x6a
{ 564} [<e0ecb370>] pkt_open+0x92/0xbe2
{ 564} [<c0162747>] do_open+0xa6/0x3d4
{ 36} [<c0162c31>] blkdev_open+0x28/0x57
{ 28} [<c0159c47>] __dentry_open+0xb8/0x192
{ 32} [<c0159d9b>] nameidata_to_filp+0x25/0x3a
{ 92} [<c0159de9>] do_filp_open+0x39/0x42
{ 44} [<c015add2>] do_sys_open+0x45/0xc0
{ 24} [<c015ae80>] sys_open+0x18/0x1a
{=3736} [<c02a87ba>] sysenter_past_esp+0x63/0xa1
<---------------------------

----------------------------->
| new stack fill maximum: vol_id/2233, 3788 bytes (out of 8136 bytes).
| Stack fill ratio: 46% - that's still OK, no need to report this.
------------|
{ 20} [<c013ba14>] debug_stackoverflow+0x80/0xae
{ 28} [<c013cbb6>] __mcount+0x2a/0x97
{ 20} [<c010e434>] mcount+0x14/0x18
{ 64} [<c0133841>] __spin_lock_init+0xd/0x58
{ 24} [<c0114207>] init_completion+0x25/0x36
{ 308} [<c0238cc0>] ide_do_drive_cmd+0xa9/0x16c
{ 100} [<e0e553aa>] cdrom_queue_packet_command+0x45/0xd8
{ 204} [<e0e559e1>] cdrom_check_status+0x58/0x60
{ 88} [<e0e55a57>] ide_cdrom_drive_status+0x2a/0x99
{ 376} [<e0c8a84b>] cdrom_open+0x7b/0x7ef
{ 32} [<e0e54756>] idecd_open+0x8a/0xbd
{ 564} [<c016297c>] do_open+0x2db/0x3d4
{ 568} [<c0162ad7>] blkdev_get+0x62/0x6a
{ 564} [<e0ecb370>] pkt_open+0x92/0xbe2
{ 564} [<c0162747>] do_open+0xa6/0x3d4
{ 36} [<c0162c31>] blkdev_open+0x28/0x57
{ 28} [<c0159c47>] __dentry_open+0xb8/0x192
{ 32} [<c0159d9b>] nameidata_to_filp+0x25/0x3a
{ 92} [<c0159de9>] do_filp_open+0x39/0x42
{ 44} [<c015add2>] do_sys_open+0x45/0xc0
{ 24} [<c015ae80>] sys_open+0x18/0x1a
{=3780} [<c02a87ba>] sysenter_past_esp+0x63/0xa1
<---------------------------

----------------------------->
| new stack fill maximum: vol_id/2233, 3816 bytes (out of 8136 bytes).
| Stack fill ratio: 46% - that's still OK, no need to report this.
------------|
{ 20} [<c013ba14>] debug_stackoverflow+0x80/0xae
{ 28} [<c013cbb6>] __mcount+0x2a/0x97
{ 20} [<c010e434>] mcount+0x14/0x18
{ 16} [<c01c6696>] memcpy+0xa/0x44
{ 76} [<c0133874>] __spin_lock_init+0x40/0x58
{ 24} [<c0114207>] init_completion+0x25/0x36
{ 308} [<c0238cc0>] ide_do_drive_cmd+0xa9/0x16c
{ 100} [<e0e553aa>] cdrom_queue_packet_command+0x45/0xd8
{ 204} [<e0e559e1>] cdrom_check_status+0x58/0x60
{ 88} [<e0e55a57>] ide_cdrom_drive_status+0x2a/0x99
{ 376} [<e0c8a84b>] cdrom_open+0x7b/0x7ef
{ 32} [<e0e54756>] idecd_open+0x8a/0xbd
{ 564} [<c016297c>] do_open+0x2db/0x3d4
{ 568} [<c0162ad7>] blkdev_get+0x62/0x6a
{ 564} [<e0ecb370>] pkt_open+0x92/0xbe2
{ 564} [<c0162747>] do_open+0xa6/0x3d4
{ 36} [<c0162c31>] blkdev_open+0x28/0x57
{ 28} [<c0159c47>] __dentry_open+0xb8/0x192
{ 32} [<c0159d9b>] nameidata_to_filp+0x25/0x3a
{ 92} [<c0159de9>] do_filp_open+0x39/0x42
{ 44} [<c015add2>] do_sys_open+0x45/0xc0
{ 24} [<c015ae80>] sys_open+0x18/0x1a
{=3808} [<c02a87ba>] sysenter_past_esp+0x63/0xa1
<---------------------------

----------------------------->
| new stack fill maximum: vol_id/2233, 3832 bytes (out of 8136 bytes).
| Stack fill ratio: 47% - that's still OK, no need to report this.
------------|
{ 20} [<c013ba14>] debug_stackoverflow+0x80/0xae
{ 28} [<c013cbb6>] __mcount+0x2a/0x97
{ 20} [<c010e434>] mcount+0x14/0x18
{ 20} [<c012e2e3>] lockdep_init_map+0xb/0xb0
{ 88} [<c0133880>] __spin_lock_init+0x4c/0x58
{ 24} [<c0114207>] init_completion+0x25/0x36
{ 308} [<c0238cc0>] ide_do_drive_cmd+0xa9/0x16c
{ 100} [<e0e553aa>] cdrom_queue_packet_command+0x45/0xd8
{ 204} [<e0e559e1>] cdrom_check_status+0x58/0x60
{ 88} [<e0e55a57>] ide_cdrom_drive_status+0x2a/0x99
{ 376} [<e0c8a84b>] cdrom_open+0x7b/0x7ef
{ 32} [<e0e54756>] idecd_open+0x8a/0xbd
{ 564} [<c016297c>] do_open+0x2db/0x3d4
{ 568} [<c0162ad7>] blkdev_get+0x62/0x6a
{ 564} [<e0ecb370>] pkt_open+0x92/0xbe2
{ 564} [<c0162747>] do_open+0xa6/0x3d4
{ 36} [<c0162c31>] blkdev_open+0x28/0x57
{ 28} [<c0159c47>] __dentry_open+0xb8/0x192
{ 32} [<c0159d9b>] nameidata_to_filp+0x25/0x3a
{ 92} [<c0159de9>] do_filp_open+0x39/0x42
{ 44} [<c015add2>] do_sys_open+0x45/0xc0
{ 24} [<c015ae80>] sys_open+0x18/0x1a
{=3824} [<c02a87ba>] sysenter_past_esp+0x63/0xa1
<---------------------------

----------------------------->
| new stack fill maximum: vol_id/2233, 4280 bytes (out of 8136 bytes).
| Stack fill ratio: 52% - that's still OK, no need to report this.
------------|
{ 20} [<c013ba14>] debug_stackoverflow+0x80/0xae
{ 28} [<c013cbb6>] __mcount+0x2a/0x97
{ 20} [<c010e434>] mcount+0x14/0x18
{ 36} [<c012f299>] __lockdep_acquire+0xe/0x936
{ 40} [<c012fc11>] lockdep_acquire+0x50/0x68
{ 36} [<c02a8572>] _spin_lock_irqsave+0x26/0x35
{ 20} [<c0120a70>] lock_timer_base+0x1f/0x3a
{ 36} [<c0120b0c>] __mod_timer+0x29/0x9c
{ 24} [<c0239a24>] __ide_set_handler+0x5c/0x65
{ 28} [<c0239c09>] ide_set_handler+0x26/0x3a
{ 44} [<e0e579da>] cdrom_transfer_packet_command+0x75/0xcd
{ 20} [<e0e57ac6>] cdrom_do_pc_continuation+0x33/0x35
{ 44} [<e0e548bb>] cdrom_start_packet_command+0x132/0x13d
{ 60} [<e0e55294>] ide_do_rw_cdrom+0x404/0x449
{ 96} [<c0238a60>] ide_do_request+0x537/0x6ee
{ 16} [<c02391cb>] do_ide_request+0x1e/0x23
{ 36} [<c01b64d5>] elv_insert+0x66/0x142
{ 32} [<c01b6639>] __elv_add_request+0x88/0x93
{ 320} [<c0238d33>] ide_do_drive_cmd+0x11c/0x16c
{ 100} [<e0e553aa>] cdrom_queue_packet_command+0x45/0xd8
{ 204} [<e0e559e1>] cdrom_check_status+0x58/0x60
{ 88} [<e0e55a57>] ide_cdrom_drive_status+0x2a/0x99
{ 376} [<e0c8a84b>] cdrom_open+0x7b/0x7ef
{ 32} [<e0e54756>] idecd_open+0x8a/0xbd
{ 564} [<c016297c>] do_open+0x2db/0x3d4
{ 568} [<c0162ad7>] blkdev_get+0x62/0x6a
{ 564} [<e0ecb370>] pkt_open+0x92/0xbe2
{ 564} [<c0162747>] do_open+0xa6/0x3d4
{ 36} [<c0162c31>] blkdev_open+0x28/0x57
{ 28} [<c0159c47>] __dentry_open+0xb8/0x192
{ 32} [<c0159d9b>] nameidata_to_filp+0x25/0x3a
{ 92} [<c0159de9>] do_filp_open+0x39/0x42
{ 44} [<c015add2>] do_sys_open+0x45/0xc0
{ 24} [<c015ae80>] sys_open+0x18/0x1a
{=4272} [<c02a87ba>] sysenter_past_esp+0x63/0xa1
<---------------------------

----------------------------->
| new stack fill maximum: vol_id/2233, 4368 bytes (out of 8136 bytes).
| Stack fill ratio: 53% - that's still OK, no need to report this.
------------|
{ 20} [<c013ba14>] debug_stackoverflow+0x80/0xae
{ 28} [<c013cbb6>] __mcount+0x2a/0x97
{ 20} [<c010e434>] mcount+0x14/0x18
{ 36} [<c012f299>] __lockdep_acquire+0xe/0x936
{ 40} [<c012fc11>] lockdep_acquire+0x50/0x68
{ 36} [<c02a8572>] _spin_lock_irqsave+0x26/0x35
{ 20} [<c0120a70>] lock_timer_base+0x1f/0x3a
{ 36} [<c0120b0c>] __mod_timer+0x29/0x9c
{ 24} [<c0239a24>] __ide_set_handler+0x5c/0x65
{ 28} [<c0239c09>] ide_set_handler+0x26/0x3a
{ 44} [<e0e579da>] cdrom_transfer_packet_command+0x75/0xcd
{ 20} [<e0e57ac6>] cdrom_do_pc_continuation+0x33/0x35
{ 44} [<e0e548bb>] cdrom_start_packet_command+0x132/0x13d
{ 60} [<e0e55294>] ide_do_rw_cdrom+0x404/0x449
{ 96} [<c0238a60>] ide_do_request+0x537/0x6ee
{ 16} [<c02391cb>] do_ide_request+0x1e/0x23
{ 36} [<c01b64d5>] elv_insert+0x66/0x142
{ 32} [<c01b6639>] __elv_add_request+0x88/0x93
{ 320} [<c0238d33>] ide_do_drive_cmd+0x11c/0x16c
{ 100} [<e0e553aa>] cdrom_queue_packet_command+0x45/0xd8
{ 200} [<e0e554dc>] ide_cdrom_packet+0x9f/0xb9
{ 92} [<e0c8a793>] cdrom_get_media_event+0x3f/0x7c
{ 88} [<e0e55a71>] ide_cdrom_drive_status+0x44/0x99
{ 376} [<e0c8a84b>] cdrom_open+0x7b/0x7ef
{ 32} [<e0e54756>] idecd_open+0x8a/0xbd
{ 564} [<c016297c>] do_open+0x2db/0x3d4
{ 568} [<c0162ad7>] blkdev_get+0x62/0x6a
{ 564} [<e0ecb370>] pkt_open+0x92/0xbe2
{ 564} [<c0162747>] do_open+0xa6/0x3d4
{ 36} [<c0162c31>] blkdev_open+0x28/0x57
{ 28} [<c0159c47>] __dentry_open+0xb8/0x192
{ 32} [<c0159d9b>] nameidata_to_filp+0x25/0x3a
{ 92} [<c0159de9>] do_filp_open+0x39/0x42
{ 44} [<c015add2>] do_sys_open+0x45/0xc0
{ 24} [<c015ae80>] sys_open+0x18/0x1a
{=4360} [<c02a87ba>] sysenter_past_esp+0x63/0xa1
<---------------------------

--
laurent
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