Re: BUG: soft lockup detected on CPU#1!

Re: BUG: soft lockup detected on CPU#1!

[Jochen Heuer]

On Mon, Jul 17, 2006 at 10:30:08AM -0400, Steven Rostedt wrote:
> 
> Jochen, you didn't say whether or not the 2.6.18-rc2 locked up. I'm
> assuming it did. But did it?

Hi Steven,

no, it did not lock up yet but I did not do any "serious" webbrowsing
with 2.6.18-rc2 so far.

Best regards,

   Jochen

Re: BUG: soft lockup detected on CPU#1!

[Jochen Heuer]

On Mon, Jul 17, 2006 at 04:48:31PM +0200, Jochen Heuer wrote:
> On Mon, Jul 17, 2006 at 10:30:08AM -0400, Steven Rostedt wrote:
> > 
> > Jochen, you didn't say whether or not the 2.6.18-rc2 locked up. I'm
> > assuming it did. But did it?
> 
> Hi Steven,
> 
> no, it did not lock up yet but I did not do any "serious" webbrowsing
> with 2.6.18-rc2 so far.

Hi,

well, it locks up with 2.6.18-rc2 too. Three times today. And always during
webbrowsing ... What's so special about it? Could it be because it accesses
network and disk at the same time?

The system has been pretty busy compiling the last days because I did setup a
new Gentoo system in chroot environment. No problem whatsoever. I did run
2 x mprime for a day and also no problem.

Is there anything I can test? Disable irq balancing? Disabling preemption did
not help. Disabling IO-APIC? What can I do to help isolate the problem because
it really is annoying and I don't like pushing the reset button. Because if the
system locks up *really* nothing works. The screen is frozen, no mouse, no
keyboard, no sys-rq, no network ... nothing.

Thanks for your help and best regards,

   Jochen

Re: BUG: soft lockup detected on CPU#1!

[Jochen Heuer]

Hi everyone.

> > Jul 17 09:23:03 [kernel]  [<c022dcbe>] crypt+0xee/0x1e0
> > Jul 17 09:23:03 [kernel]  [<c022ddef>] crypt_iv_unaligned+0x3f/0xc0
> > Jul 17 09:23:03 [kernel]  [<c022e23d>] cbc_decrypt_iv+0x3d/0x50
> > Jul 17 09:23:03 [kernel]  [<c032f6b7>] crypt_convert_scatterlist+0x117/0x170
> > Jul 17 09:23:03 [kernel]  [<c032f8b2>] crypt_convert+0x142/0x190
> > Jul 17 09:23:03 [kernel]  [<c032fb82>] kcryptd_do_work+0x42/0x60
> > Jul 17 09:23:03 [kernel]  [<c012fcff>] run_workqueue+0x6f/0xe0
> > Jul 17 09:23:03 [kernel]  [<c012fe98>] worker_thread+0x128/0x150
> > Jul 17 09:23:03 [kernel]  [<c0133364>] kthread+0xa4/0xe0
> > Jul 17 09:23:03 [kernel]  [<c01010e5>] kernel_thread_helper+0x5/0x10
> > Jul 17 09:24:17 [kernel] =============================================
> > Jul 17 09:24:17 [kernel] [ INFO: possible recursive locking detected ]
> > Jul 17 09:24:17 [kernel] ---------------------------------------------
> 
> This looks like a separate issue, and something more about fixing
> lockdep not to report it instead of an actual bug (and why I CC'd the
> xfs folks and Ingo).
> 
> Probably XFS needs to tell lockdep about it's nesting. But maybe there
> is a bug that is lying in there somewhere.

I have some more of these. Now they look like this every time I get them:

Jul 19 18:43:15 [kernel] =============================================
Jul 19 18:43:15 [kernel] [ INFO: possible recursive locking detected ]
Jul 19 18:43:15 [kernel] ---------------------------------------------
Jul 19 18:43:15 [kernel] qmail-local/9368 is trying to acquire lock:
Jul 19 18:43:15 [kernel]  (&(&ip->i_lock)->mr_lock){----}, at: [<c01f63b0>]
xfs_ilock+0x60/0xb0
Jul 19 18:43:15 [kernel] but task is already holding lock:
Jul 19 18:43:15 [kernel]  (&(&ip->i_lock)->mr_lock){----}, at: [<c01f63b0>]
xfs_ilock+0x60/0xb0
Jul 19 18:43:15 [kernel] other info that might help us debug this:
Jul 19 18:43:15 [kernel] 2 locks held by qmail-local/9368:
Jul 19 18:43:15 [kernel]  #0:  (&inode->i_mutex){--..}, at: [<c03c2931>]
mutex_lock+0x21/0x30
Jul 19 18:43:15 [kernel]  #1:  (&(&ip->i_lock)->mr_lock){----}, at:
[<c01f63b0>] xfs_ilock+0x60/0xb0
Jul 19 18:43:15 [kernel] stack backtrace:
Jul 19 18:43:15 [kernel]  [<c0103cd2>] show_trace+0x12/0x20
Jul 19 18:43:15 [kernel]  [<c0103de9>] dump_stack+0x19/0x20
Jul 19 18:43:15 [kernel]  [<c01385a9>] print_deadlock_bug+0xb9/0xd0
Jul 19 18:43:15 [kernel]  [<c013862b>] check_deadlock+0x6b/0x80
Jul 19 18:43:15 [kernel]  [<c0139ed4>] __lock_acquire+0x354/0x990
Jul 19 18:43:15 [kernel]  [<c013ac35>] lock_acquire+0x75/0xa0
Jul 19 18:43:15 [kernel]  [<c0136aaf>] down_write+0x3f/0x60
Jul 19 18:43:15 [kernel]  [<c01f63b0>] xfs_ilock+0x60/0xb0
Jul 19 18:43:15 [kernel]  [<c01f5b3a>] xfs_iget_core+0x2aa/0x5b0
Jul 19 18:43:15 [kernel]  [<c01f5f0c>] xfs_iget+0xcc/0x150
Jul 19 18:43:15 [kernel]  [<c0210b38>] xfs_trans_iget+0xa8/0x140
Jul 19 18:43:15 [kernel]  [<c01f80af>] xfs_ialloc+0xaf/0x4c0
Jul 19 18:43:15 [kernel]  [<c021159d>] xfs_dir_ialloc+0x6d/0x280
Jul 19 18:43:15 [kernel]  [<c0217381>] xfs_create+0x241/0x670
Jul 19 18:43:15 [kernel]  [<c022307d>] xfs_vn_mknod+0x1ed/0x2e0
Jul 19 18:43:15 [kernel]  [<c0223182>] xfs_vn_create+0x12/0x20
Jul 19 18:43:15 [kernel]  [<c017514d>] vfs_create+0x7d/0xd0
Jul 19 18:43:15 [kernel]  [<c017542f>] open_namei+0xbf/0x620
Jul 19 18:43:15 [kernel]  [<c016487c>] do_filp_open+0x2c/0x60
Jul 19 18:43:15 [kernel]  [<c0164c00>] do_sys_open+0x50/0xe0
Jul 19 18:43:15 [kernel]  [<c0164cac>] sys_open+0x1c/0x20
Jul 19 18:43:15 [kernel]  [<c0102e15>] sysenter_past_esp+0x56/0x8d

Best regards,

   Jochen

BUG: soft lockup detected on CPU#1!

[raksac]

Hello,

I am running the 2.6.28 based xfs kernel driver on a
custom kernel with following kernel config enabled.

CONFIG_PREEMPT
CONFIG_DETECT_SOFTLOCKUP

Running the following xfsqa causes a soft lockup. The
configuration is a x86 with Hyperthreading, 4GB RAM
and a AHCI connected JBOD. Its 100% reproducible.

Any suggestions/inputs on where to start debugging the
problem would be much appreciated.

#! /bin/sh
# FS QA Test No. 008
#
# randholes test
#

BUG: soft lockup detected on CPU#1!
 [<4013d525>] softlockup_tick+0x9c/0xaf
 [<40123246>] update_process_times+0x3d/0x60
 [<401100ab>] smp_apic_timer_interrupt+0x52/0x58
 [<40103633>] apic_timer_interrupt+0x1f/0x24
 [<402a1557>] _spin_lock_irqsave+0x48/0x61
 [<f8b8fe30>] xfs_iflush_cluster+0x16d/0x31c [xfs]
 [<f8b9018b>] xfs_iflush+0x1ac/0x271 [xfs]
 [<f8ba49a1>] xfs_inode_flush+0xd6/0xfa [xfs]
 [<f8bb13c8>] xfs_fs_write_inode+0x27/0x40 [xfs]
 [<401789d9>] __writeback_single_inode+0x1b0/0x2ff
 [<40101ad5>] __switch_to+0x23/0x1f9
 [<40178f87>] sync_sb_inodes+0x196/0x261
 [<4017920a>] writeback_inodes+0x67/0xb1
 [<401465df>] wb_kupdate+0x7b/0xe0
 [<40146bc3>] pdflush+0x0/0x1b5
 [<40146ce1>] pdflush+0x11e/0x1b5
 [<40146564>] wb_kupdate+0x0/0xe0
 [<4012be6d>] kthread+0xc1/0xec
 [<4012bdac>] kthread+0x0/0xec
 [<401038b3>] kernel_thread_helper+0x7/0x10
 =======================

Thanks,
Rakesh


      

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Re: BUG: soft lockup detected on CPU#1!

[Justin Piszcz]

On Tue, 10 Feb 2009, raksac@yahoo.com wrote:

>
> Hello,
>
> I am running the 2.6.28 based xfs kernel driver on a
> custom kernel with following kernel config enabled.
>
> CONFIG_PREEMPT
> CONFIG_DETECT_SOFTLOCKUP
>
> Running the following xfsqa causes a soft lockup. The
> configuration is a x86 with Hyperthreading, 4GB RAM
> and a AHCI connected JBOD. Its 100% reproducible.
>
> Any suggestions/inputs on where to start debugging the
> problem would be much appreciated.
>
> #! /bin/sh
> # FS QA Test No. 008
> #
> # randholes test
> #
>
> BUG: soft lockup detected on CPU#1!
> [<4013d525>] softlockup_tick+0x9c/0xaf
> [<40123246>] update_process_times+0x3d/0x60
> [<401100ab>] smp_apic_timer_interrupt+0x52/0x58
> [<40103633>] apic_timer_interrupt+0x1f/0x24
> [<402a1557>] _spin_lock_irqsave+0x48/0x61
> [<f8b8fe30>] xfs_iflush_cluster+0x16d/0x31c [xfs]
> [<f8b9018b>] xfs_iflush+0x1ac/0x271 [xfs]
> [<f8ba49a1>] xfs_inode_flush+0xd6/0xfa [xfs]
> [<f8bb13c8>] xfs_fs_write_inode+0x27/0x40 [xfs]
> [<401789d9>] __writeback_single_inode+0x1b0/0x2ff
> [<40101ad5>] __switch_to+0x23/0x1f9
> [<40178f87>] sync_sb_inodes+0x196/0x261
> [<4017920a>] writeback_inodes+0x67/0xb1
> [<401465df>] wb_kupdate+0x7b/0xe0
> [<40146bc3>] pdflush+0x0/0x1b5
> [<40146ce1>] pdflush+0x11e/0x1b5
> [<40146564>] wb_kupdate+0x0/0xe0
> [<4012be6d>] kthread+0xc1/0xec
> [<4012bdac>] kthread+0x0/0xec
> [<401038b3>] kernel_thread_helper+0x7/0x10
> =======================
>
> Thanks,
> Rakesh
>
>
>
>
> _______________________________________________
> xfs mailing list
> xfs@oss.sgi.com
> http://oss.sgi.com/mailman/listinfo/xfs
>

There were some pretty nasty bugs in 2.6.28 for XFS, can you reproduce it on 
2.6.28.4?

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Re: BUG: soft lockup detected on CPU#1!

[raksac]

Hi Justin,

Thank you for the pointer. Well as suggested I did and
now the xfsqa goes upto test 011 

#! /bin/sh
# FS QA Test No. 011
#
# dirstress

but dies with a oops. Any suggestions?

Here is the oops trace -

BUG: unable to handle kernel NULL pointer dereference
at virtual address 00000000
 printing eip:
f8bd02c2
*pde = e7167067
Oops: 0000 [#1]
PREEMPT SMP 
last sysfs file:
/devices/pci0000:00/0000:00:1f.3/i2c-0/0-002e/temp1_input
Modules linked in: xfs sg sunrpc m24c02 pca9554
pca9555 mcp23016 lm85 hwmon_vid i2c_i801 i2c_core
midplane uhci_hcd sk98lin tg3 e1000 mv_sata sd_mod
ahci libata
CPU:    1
EIP:    0060:[<f8bd02c2>]    Not tainted VLI
EFLAGS: 00010286   (2.6.18.rhel5 #2) 
EIP is at xfs_iget_core+0x4d6/0x5e9 [xfs]
eax: 00000000   ebx: e8ae7850   ecx: e79b2000   edx:
00000000
esi: e8ae7920   edi: ea44d2d0   ebp: ea44d298   esp:
e79b3ce4
ds: 007b   es: 007b   ss: 0068
Process dirstress (pid: 9927, ti=e79b2000
task=e790faa0 task.ti=e79b2000)
Stack: ea7b0034 e9072c00 ea2a6380 0003b84a e8ae7850
ea2a6380 02c9f600 00000004 
       e9072c00 f8bd0478 1003b84a 00000000 00000001
00000004 e79b3d5c 00000000 
       00000000 ea7b0034 e9072c00 ea7b0034 1003b84a
00000000 f8bebbf1 1003b84a 
Call Trace:
 [<f8bd0478>] xfs_iget+0xa3/0x12f [xfs]
 [<f8bebbf1>] xfs_trans_iget+0x1bd/0x249 [xfs]
 [<f8bd4ebe>] xfs_ialloc+0xb9/0x5a9 [xfs]
 [<f8bdc777>] xlog_grant_push_ail+0x105/0x12c [xfs]
 [<f8bec673>] xfs_dir_ialloc+0x7e/0x26b [xfs]
 [<f8be8c81>] xfs_trans_reserve+0x15c/0x240 [xfs]
 [<f8bf12c8>] xfs_symlink+0x34a/0x862 [xfs]
 [<401a62dd>] avc_has_perm_noaudit+0x38f/0x42d
 [<401a6e9d>] avc_has_perm+0x3b/0x46
 [<f8bf9d8e>] xfs_vn_symlink+0x6a/0xad [xfs]
 [<4016a06d>] vfs_symlink+0xb2/0x11a
 [<4016a149>] sys_symlinkat+0x74/0xab
 [<402a14c2>] _spin_lock+0xd/0x5a
 [<402a1593>] _spin_unlock+0xd/0x21
 [<4016f416>] dput+0x83/0x11c
 [<4015c89d>] __fput+0x152/0x175
 [<4016a18f>] sys_symlink+0xf/0x13
 [<40102b73>] syscall_call+0x7/0xb
 =======================
Code: 8b 40 08 a8 08 74 05 e8 6d ff 6c 47 8b 44 24 04
05 38 01 00 00 e8 24 02 6d 47 8b 44 24 04 8b 98 2c 01
00 00 85 db 74 3d 8b 43 04 <39> 18 74 14 b9 14 01 00
00 ba 20 8a c0 f8 b8 d8 8c c0 f8 e8 32 
EIP: [<f8bd02c2>] xfs_iget_core+0x4d6/0x5e9 [xfs]
SS:ESP 0068:e79b3ce4
 <0>Kernel panic - not syncing: Fatal exception

Thanks,
Rakesh

--- Justin Piszcz <jpiszcz@lucidpixels.com> wrote:

> 
> On Tue, 10 Feb 2009, raksac@yahoo.com wrote:
> 
> >
> > Hello,
> >
> > I am running the 2.6.28 based xfs kernel driver on
> a
> > custom kernel with following kernel config
> enabled.
> >
> > CONFIG_PREEMPT
> > CONFIG_DETECT_SOFTLOCKUP
> >
> > Running the following xfsqa causes a soft lockup.
> The
> > configuration is a x86 with Hyperthreading, 4GB
> RAM
> > and a AHCI connected JBOD. Its 100% reproducible.
> >
> > Any suggestions/inputs on where to start debugging
> the
> > problem would be much appreciated.
> >
> > #! /bin/sh
> > # FS QA Test No. 008
> > #
> > # randholes test
> > #
> >
> > BUG: soft lockup detected on CPU#1!
> > [<4013d525>] softlockup_tick+0x9c/0xaf
> > [<40123246>] update_process_times+0x3d/0x60
> > [<401100ab>] smp_apic_timer_interrupt+0x52/0x58
> > [<40103633>] apic_timer_interrupt+0x1f/0x24
> > [<402a1557>] _spin_lock_irqsave+0x48/0x61
> > [<f8b8fe30>] xfs_iflush_cluster+0x16d/0x31c [xfs]
> > [<f8b9018b>] xfs_iflush+0x1ac/0x271 [xfs]
> > [<f8ba49a1>] xfs_inode_flush+0xd6/0xfa [xfs]
> > [<f8bb13c8>] xfs_fs_write_inode+0x27/0x40 [xfs]
> > [<401789d9>] __writeback_single_inode+0x1b0/0x2ff
> > [<40101ad5>] __switch_to+0x23/0x1f9
> > [<40178f87>] sync_sb_inodes+0x196/0x261
> > [<4017920a>] writeback_inodes+0x67/0xb1
> > [<401465df>] wb_kupdate+0x7b/0xe0
> > [<40146bc3>] pdflush+0x0/0x1b5
> > [<40146ce1>] pdflush+0x11e/0x1b5
> > [<40146564>] wb_kupdate+0x0/0xe0
> > [<4012be6d>] kthread+0xc1/0xec
> > [<4012bdac>] kthread+0x0/0xec
> > [<401038b3>] kernel_thread_helper+0x7/0x10
> > =======================
> >
> > Thanks,
> > Rakesh
> >
> >
> >
> >
> > _______________________________________________
> > xfs mailing list
> > xfs@oss.sgi.com
> > http://oss.sgi.com/mailman/listinfo/xfs
> >
> 
> There were some pretty nasty bugs in 2.6.28 for XFS,
> can you reproduce it on 
> 2.6.28.4?
> 



      

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Re: BUG: soft lockup detected on CPU#1!

[Justin Piszcz]

On Wed, 11 Feb 2009, raksac@yahoo.com wrote:

>
> Hi Justin,
>
> Thank you for the pointer. Well as suggested I did and
> now the xfsqa goes upto test 011
>
> #! /bin/sh
> # FS QA Test No. 011
> #
> # dirstress
>
> but dies with a oops. Any suggestions?
>
> Here is the oops trace -
>
> BUG: unable to handle kernel NULL pointer dereference
> at virtual address 00000000
> printing eip:
> f8bd02c2
> *pde = e7167067
> Oops: 0000 [#1]
> PREEMPT SMP
> last sysfs file:
> /devices/pci0000:00/0000:00:1f.3/i2c-0/0-002e/temp1_input
> Modules linked in: xfs sg sunrpc m24c02 pca9554
> pca9555 mcp23016 lm85 hwmon_vid i2c_i801 i2c_core
> midplane uhci_hcd sk98lin tg3 e1000 mv_sata sd_mod
> ahci libata
> CPU:    1
> EIP:    0060:[<f8bd02c2>]    Not tainted VLI
> EFLAGS: 00010286   (2.6.18.rhel5 #2)
> EIP is at xfs_iget_core+0x4d6/0x5e9 [xfs]

Can you show uname -a output?

EFLAGS: 00010286   (2.6.18.rhel5 #2)
                     ^^^^^^^^^^^^

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Re: BUG: soft lockup detected on CPU#1!

[raksac]

Hi Justin,

Yes it is a 2.6.18 rhel5 based custom kernel but the
XFS driver is a back port from the 2.6.28.4

Thanks,
Rakesh

--- Justin Piszcz <jpiszcz@lucidpixels.com> wrote:

> 
> On Wed, 11 Feb 2009, raksac@yahoo.com wrote:
> 
> >
> > Hi Justin,
> >
> > Thank you for the pointer. Well as suggested I did
> and
> > now the xfsqa goes upto test 011
> >
> > #! /bin/sh
> > # FS QA Test No. 011
> > #
> > # dirstress
> >
> > but dies with a oops. Any suggestions?
> >
> > Here is the oops trace -
> >
> > BUG: unable to handle kernel NULL pointer
> dereference
> > at virtual address 00000000
> > printing eip:
> > f8bd02c2
> > *pde = e7167067
> > Oops: 0000 [#1]
> > PREEMPT SMP
> > last sysfs file:
> >
>
/devices/pci0000:00/0000:00:1f.3/i2c-0/0-002e/temp1_input
> > Modules linked in: xfs sg sunrpc m24c02 pca9554
> > pca9555 mcp23016 lm85 hwmon_vid i2c_i801 i2c_core
> > midplane uhci_hcd sk98lin tg3 e1000 mv_sata sd_mod
> > ahci libata
> > CPU:    1
> > EIP:    0060:[<f8bd02c2>]    Not tainted VLI
> > EFLAGS: 00010286   (2.6.18.rhel5 #2)
> > EIP is at xfs_iget_core+0x4d6/0x5e9 [xfs]
> 
> Can you show uname -a output?
> 
> EFLAGS: 00010286   (2.6.18.rhel5 #2)
>                      ^^^^^^^^^^^^
> 



      

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Re: BUG: soft lockup detected on CPU#1!

[Dave Chinner]

On Thu, Feb 12, 2009 at 01:22:16AM -0800, raksac@yahoo.com wrote:
> 
> Hi Justin,
> 
> Yes it is a 2.6.18 rhel5 based custom kernel but the
> XFS driver is a back port from the 2.6.28.4

Then you get to keep all the broken bits to yourself.  If you want
to throw random versions of XFS at random versions of kernels then
we can't help you - we don't have the time or resources to support
random backports of XFS to older kernels (and non-vanilla kernels
at that).

Cheers,

Dave.
-- 
Dave Chinner
david@fromorbit.com

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Re: BUG: soft lockup detected on CPU#1!

[raksac]

Well the problem is the older kernel XFS driver is
buggy to such a large extent that there is data loss
even for data on rest should a power loss occur.

With a newer version back port I can preserve the
kernel version change since it becomes far more
reaching to the other kernel components and they have
to move, to which ..... there is strong reservation.

Hope this gives you the perspective.

Thanks,
Rakesh 
--- Dave Chinner <david@fromorbit.com> wrote:

> On Thu, Feb 12, 2009 at 01:22:16AM -0800,
> raksac@yahoo.com wrote:
> > 
> > Hi Justin,
> > 
> > Yes it is a 2.6.18 rhel5 based custom kernel but
> the
> > XFS driver is a back port from the 2.6.28.4
> 
> Then you get to keep all the broken bits to
> yourself.  If you want
> to throw random versions of XFS at random versions
> of kernels then
> we can't help you - we don't have the time or
> resources to support
> random backports of XFS to older kernels (and
> non-vanilla kernels
> at that).
> 
> Cheers,
> 
> Dave.
> -- 
> Dave Chinner
> david@fromorbit.com
> 



      

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Re: BUG: soft lockup detected on CPU#1!

[Eric Sandeen]

raksac@yahoo.com wrote:
> Well the problem is the older kernel XFS driver is
> buggy to such a large extent that there is data loss
> even for data on rest should a power loss occur.
> 
> With a newer version back port I can preserve the
> kernel version change since it becomes far more
> reaching to the other kernel components and they have
> to move, to which ..... there is strong reservation.
> 
> Hope this gives you the perspective.

It's totally understandable why you might want to do it.

It's also totally understandable why upstream developers can't spend a
lot of time on your custom codebase.

What you need, of course, is a distribution with good support for xfs,
so you can make it Someone Else's Problem.  :)

-Eric

> Thanks,
> Rakesh 



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Re: BUG: soft lockup detected on CPU#1!

[raksac]

Guys,

Thank you for taking the time to write. Having said
where I stand and we are kind of on the same page. Is
there something I can expect which would put me on a
track of nailing down the problem. It maybe a wild
goose chase but something that I can start with would
be much appreciated.

Unfortunately there is no distro which gets closer to
where mainline lives today. Reading the changelog
there are several problems that I have already come
across and has convincingly driven me to take on this
task.

Thanks,
Rakesh

--- Eric Sandeen <sandeen@sandeen.net> wrote:

> raksac@yahoo.com wrote:
> > Well the problem is the older kernel XFS driver is
> > buggy to such a large extent that there is data
> loss
> > even for data on rest should a power loss occur.
> > 
> > With a newer version back port I can preserve the
> > kernel version change since it becomes far more
> > reaching to the other kernel components and they
> have
> > to move, to which ..... there is strong
> reservation.
> > 
> > Hope this gives you the perspective.
> 
> It's totally understandable why you might want to do
> it.
> 
> It's also totally understandable why upstream
> developers can't spend a
> lot of time on your custom codebase.
> 
> What you need, of course, is a distribution with
> good support for xfs,
> so you can make it Someone Else's Problem.  :)
> 
> -Eric
> 
> > Thanks,
> > Rakesh 
> 
> 
> 
> 



      

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Re: BUG: soft lockup detected on CPU#1!

[Eric Sandeen]

raksac@yahoo.com wrote:
> Guys,
> 
> Thank you for taking the time to write. Having said
> where I stand and we are kind of on the same page. Is
> there something I can expect which would put me on a
> track of nailing down the problem. It maybe a wild
> goose chase but something that I can start with would
> be much appreciated.

Just random debugging thoughts...

Try stock 2.6.28.4, to see if you have the same problem.  If so, and
esp. if you also see it on 2.6.29, then you'll get a lot more attention
here.  :)

If not, then it's something with your backport most likely.  Figure out
what you had to backport and see if it's possibly causing the error(s).

If it's locked up, try sysrq-w (echo w > /proc/sysrq-trigger) and look
at dmesg to see if other threads are locked against it.  Figure out why.

On the oops try memory debugging etc, see if you're referencing freed
memory, using corrupt lists, etc.

Look for other errors in the logs prior to this.

See if your filesystem is corrupted.

Bug Red Hat for XFS support, assuming you're actually buying RHEL5
support from them.  :)

> Unfortunately there is no distro which gets closer to
> where mainline lives today. Reading the changelog
> there are several problems that I have already come
> across and has convincingly driven me to take on this
> task.

well certainly there are distros with kernels newer than 2.6.18, but it
depends on your needs & goals I guess.

Good luck,
-Eric

-Eric

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Re: BUG: soft lockup detected on CPU#1!

[raksac]

I think I am getting closer now. Can you suggest what
to look for from this oops -


Stack traceback for pid 192
0xad12f030      192       11  1    0   R  0xad12f1d0
*xfsdatad/0
esp        eip        Function (args)
0xaff37eec 0x7815007b map_vm_area+0xc3
0xaff37ef0 0x7814007b find_get_pages_contig+0x3d
0xaff37ef8 0x78156c04 free_block+0x41
0xaff37f20 0x78156d9b cache_flusharray+0x63
0xaff37f3c 0x78156b4e kmem_cache_free+0x52
0xaff37f4c 0x7814296f mempool_free_slab+0xb
0xaff37f50 0x78142954 mempool_free+0x60
0xaff37f60 0x781f429f xfs_destroy_ioend+0x4e
0xaff37f6c 0x781f43d0 xfs_end_bio_read+0x5
0xaff37f70 0x78128498 run_workqueue+0x71
0xaff37f74 0x781f43cb xfs_end_bio_read
0xaff37f8c 0x78128634 worker_thread+0xd9
0xaff37fac 0x781164c0 default_wake_function
0xaff37fc8 0x7812855b worker_thread
0xaff37fcc 0x7812ad7a kthread+0xc1
0xaff37fd8 0x7812acb9 kthread
0xaff37fe4 0x781036df kernel_thread_helper+0x7

Thanks,
Rakesh

--- Eric Sandeen <sandeen@sandeen.net> wrote:

> raksac@yahoo.com wrote:
> > Guys,
> > 
> > Thank you for taking the time to write. Having
> said
> > where I stand and we are kind of on the same page.
> Is
> > there something I can expect which would put me on
> a
> > track of nailing down the problem. It maybe a wild
> > goose chase but something that I can start with
> would
> > be much appreciated.
> 
> Just random debugging thoughts...
> 
> Try stock 2.6.28.4, to see if you have the same
> problem.  If so, and
> esp. if you also see it on 2.6.29, then you'll get a
> lot more attention
> here.  :)
> 
> If not, then it's something with your backport most
> likely.  Figure out
> what you had to backport and see if it's possibly
> causing the error(s).
> 
> If it's locked up, try sysrq-w (echo w >
> /proc/sysrq-trigger) and look
> at dmesg to see if other threads are locked against
> it.  Figure out why.
> 
> On the oops try memory debugging etc, see if you're
> referencing freed
> memory, using corrupt lists, etc.
> 
> Look for other errors in the logs prior to this.
> 
> See if your filesystem is corrupted.
> 
> Bug Red Hat for XFS support, assuming you're
> actually buying RHEL5
> support from them.  :)
> 
> > Unfortunately there is no distro which gets closer
> to
> > where mainline lives today. Reading the changelog
> > there are several problems that I have already
> come
> > across and has convincingly driven me to take on
> this
> > task.
> 
> well certainly there are distros with kernels newer
> than 2.6.18, but it
> depends on your needs & goals I guess.
> 
> Good luck,
> -Eric
> 
> -Eric
> 



      

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Re: BUG: soft lockup detected on CPU#1!

[Michael Monnerie]

On Donnerstag 12 Februar 2009 raksac@yahoo.com wrote:
> Unfortunately there is no distro which gets closer to
> where mainline lives today.

If I understand correctly, I would say use openSUSE 11.1, which has 
kernel 2.6.27.7-9 as of today (and full XFS support).

And you can still download a newer vanilla kernel and use it on your 
distro. You do not need to use the distro kernel, you just need to 
install kernel updates on your own then.

mfg zmi
-- 
// Michael Monnerie, Ing.BSc    -----      http://it-management.at
// Tel: 0660 / 415 65 31                      .network.your.ideas.
// PGP Key:         "curl -s http://zmi.at/zmi.asc | gpg --import"
// Fingerprint: AC19 F9D5 36ED CD8A EF38  500E CE14 91F7 1C12 09B4
// Keyserver: wwwkeys.eu.pgp.net                  Key-ID: 1C1209B4

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Re: BUG: soft lockup detected on CPU#1!

[raksac]

With debug enabled it fails with this -

BUG: unable to handle kernel NULL pointer dereference
at virtual address 00000000
 printing eip:
f8bd02c2
*pde = d658e067
Assertion failed: atomic_read(&ip->i_pincount) > 0,
file: fs/xfs/xfs_inode.c, line: 2703
------------[ cut here ]------------
Kernel BUG at [verbose debug info unavailable]
invalid opcode: 0000 [#1]
PREEMPT SMP 
last sysfs file:
/devices/pci0000:00/0000:00:1f.3/i2c-0/0-002e/temp2_input
Modules linked in: sg xfs sunrpc m24c02 pca9554
pca9555 mcp23016 lm85 hwmon_vid i2c_i801 i2c_core
midplane uhci_hcd sk98lin tg3 e1000 mv_sata sd_mod
ahci libata
CPU:    0
EIP:    0060:[<f8bfde19>]    Not tainted VLI
EFLAGS: 00010296   (2.6.18.rhel5 #2) 
EIP is at assfail+0xd/0x13 [xfs]
eax: 0000005c   ebx: e1fb4980   ecx: e4f46000   edx:
00000000
esi: 00000007   edi: e1fb0a58   ebp: 00000007   esp:
e4f47eb8
ds: 007b   es: 007b   ss: 0068
Process xfslogd/0 (pid: 4370, ti=e4f46000
task=75118aa0 task.ti=e4f46000)
Stack: f8c10ccb f8c090ae f8c08d97 00000a8f f8bd0dca
00000526 f8be8e28 00000526 
       00000007 e9db1d80 e861c008 e9db1da0 e861c000
00000003 e9db1d80 e9db1ca4 
       e9db1ca0 00000000 f8be8f56 00000000 00000000
e9db1ca4 ea449880 ea449800 
Call Trace:
 [<f8bd0dca>] xfs_iunpin+0x21/0x49 [xfs]
 [<f8be8e28>] xfs_trans_chunk_committed+0xc3/0xe6
[xfs]
 [<f8be8f56>] xfs_trans_committed+0x38/0xd1 [xfs]
 [<f8bdba5c>] xlog_state_do_callback+0x1b7/0x329 [xfs]
 [<f8bf66b7>] xfs_buf_iodone_work+0x41/0x63 [xfs]
 [<401294c5>] run_workqueue+0x71/0xae
 [<f8bf6676>] xfs_buf_iodone_work+0x0/0x63 [xfs]
 [<40129666>] worker_thread+0xd9/0x10a
 [<40116ca2>] default_wake_function+0x0/0xc
 [<4012958d>] worker_thread+0x0/0x10a
 [<4012be6d>] kthread+0xc1/0xec
 [<4012bdac>] kthread+0x0/0xec
 [<401038b3>] kernel_thread_helper+0x7/0x10
 =======================
Code: d2 df 51 47 89 ea b8 94 59 c2 f8 e8 a9 37 6a 47
83 c4 0c 85 ff 75 02 0f 0b 5b 5e 5f 5d c3 51 52 50 68
cb 0c c1 f8 e8 ab df 51 47 <0f> 0b 83 c4 10 c3 55 57
56 53 83 ec 14 89 44 24 04 89 d7 89 cd 
EIP: [<f8bfde19>] assfail+0xd/0x13 [xfs] SS:ESP
0068:e4f47eb8
 <0>Kernel panic - not syncing: Fatal exception

--- Justin Piszcz <jpiszcz@lucidpixels.com> wrote:

> 
> On Tue, 10 Feb 2009, raksac@yahoo.com wrote:
> 
> >
> > Hello,
> >
> > I am running the 2.6.28 based xfs kernel driver on
> a
> > custom kernel with following kernel config
> enabled.
> >
> > CONFIG_PREEMPT
> > CONFIG_DETECT_SOFTLOCKUP
> >
> > Running the following xfsqa causes a soft lockup.
> The
> > configuration is a x86 with Hyperthreading, 4GB
> RAM
> > and a AHCI connected JBOD. Its 100% reproducible.
> >
> > Any suggestions/inputs on where to start debugging
> the
> > problem would be much appreciated.
> >
> > #! /bin/sh
> > # FS QA Test No. 008
> > #
> > # randholes test
> > #
> >
> > BUG: soft lockup detected on CPU#1!
> > [<4013d525>] softlockup_tick+0x9c/0xaf
> > [<40123246>] update_process_times+0x3d/0x60
> > [<401100ab>] smp_apic_timer_interrupt+0x52/0x58
> > [<40103633>] apic_timer_interrupt+0x1f/0x24
> > [<402a1557>] _spin_lock_irqsave+0x48/0x61
> > [<f8b8fe30>] xfs_iflush_cluster+0x16d/0x31c [xfs]
> > [<f8b9018b>] xfs_iflush+0x1ac/0x271 [xfs]
> > [<f8ba49a1>] xfs_inode_flush+0xd6/0xfa [xfs]
> > [<f8bb13c8>] xfs_fs_write_inode+0x27/0x40 [xfs]
> > [<401789d9>] __writeback_single_inode+0x1b0/0x2ff
> > [<40101ad5>] __switch_to+0x23/0x1f9
> > [<40178f87>] sync_sb_inodes+0x196/0x261
> > [<4017920a>] writeback_inodes+0x67/0xb1
> > [<401465df>] wb_kupdate+0x7b/0xe0
> > [<40146bc3>] pdflush+0x0/0x1b5
> > [<40146ce1>] pdflush+0x11e/0x1b5
> > [<40146564>] wb_kupdate+0x0/0xe0
> > [<4012be6d>] kthread+0xc1/0xec
> > [<4012bdac>] kthread+0x0/0xec
> > [<401038b3>] kernel_thread_helper+0x7/0x10
> > =======================
> >
> > Thanks,
> > Rakesh
> >
> >
> >
> >
> > _______________________________________________
> > xfs mailing list
> > xfs@oss.sgi.com
> > http://oss.sgi.com/mailman/listinfo/xfs
> >
> 
> There were some pretty nasty bugs in 2.6.28 for XFS,
> can you reproduce it on 
> 2.6.28.4?
> 



      

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Re: BUG: soft lockup detected on CPU#1!

[Dave Chinner]

On Tue, Feb 10, 2009 at 11:16:25PM -0800, raksac@yahoo.com wrote:
> 
> Hello,
> 
> I am running the 2.6.28 based xfs kernel driver on a
> custom kernel with following kernel config enabled.
> 
> CONFIG_PREEMPT
> CONFIG_DETECT_SOFTLOCKUP
> 
> Running the following xfsqa causes a soft lockup. The
> configuration is a x86 with Hyperthreading, 4GB RAM
> and a AHCI connected JBOD. Its 100% reproducible.

Is the system making progress, or has it hung? i.e. does the test
complete?

Cheers,

Dave.
-- 
Dave Chinner
david@fromorbit.com

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Re: BUG: soft lockup detected on CPU#1!

[raksac]

Hi Dave,

No it does not. Just sits there any access to mount
point (ll) also blocks forever.

I must point out that I brought the changes from
2.6.28.4 xfs into my private space and that seems to
show improvement on test 008 however now test 011 dies
with kernel oops.

Please see my reply posts.

Thanks,
Rakesh
--- Dave Chinner <david@fromorbit.com> wrote:

> On Tue, Feb 10, 2009 at 11:16:25PM -0800,
> raksac@yahoo.com wrote:
> > 
> > Hello,
> > 
> > I am running the 2.6.28 based xfs kernel driver on
> a
> > custom kernel with following kernel config
> enabled.
> > 
> > CONFIG_PREEMPT
> > CONFIG_DETECT_SOFTLOCKUP
> > 
> > Running the following xfsqa causes a soft lockup.
> The
> > configuration is a x86 with Hyperthreading, 4GB
> RAM
> > and a AHCI connected JBOD. Its 100% reproducible.
> 
> Is the system making progress, or has it hung? i.e.
> does the test
> complete?
> 
> Cheers,
> 
> Dave.
> -- 
> Dave Chinner
> david@fromorbit.com
> 



      

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BUG: soft lockup detected on CPU#1!

[Rakesh]

Hello,

I am running the 2.6.28 based xfs kernel driver on a
custom kernel with following kernel config enabled.

CONFIG_PREEMPT
CONFIG_DETECT_SOFTLOCKUP

Running the following xfsqa causes a soft lockup. The
configuration is a x86 with Hyperthreading, 4GB RAM
and a AHCI connected JBOD. Its 100% reproducible.

Any suggestions/inputs on where to start debugging the
problem would be much appreciated.

#! /bin/sh
# FS QA Test No. 008
#
# randholes test
#

BUG: soft lockup detected on CPU#1!
 [<4013d525>] softlockup_tick+0x9c/0xaf
 [<40123246>] update_process_times+0x3d/0x60
 [<401100ab>] smp_apic_timer_interrupt+0x52/0x58
 [<40103633>] apic_timer_interrupt+0x1f/0x24
 [<402a1557>] _spin_lock_irqsave+0x48/0x61
 [<f8b8fe30>] xfs_iflush_cluster+0x16d/0x31c [xfs]
 [<f8b9018b>] xfs_iflush+0x1ac/0x271 [xfs]
 [<f8ba49a1>] xfs_inode_flush+0xd6/0xfa [xfs]
 [<f8bb13c8>] xfs_fs_write_inode+0x27/0x40 [xfs]
 [<401789d9>] __writeback_single_inode+0x1b0/0x2ff
 [<40101ad5>] __switch_to+0x23/0x1f9
 [<40178f87>] sync_sb_inodes+0x196/0x261
 [<4017920a>] writeback_inodes+0x67/0xb1
 [<401465df>] wb_kupdate+0x7b/0xe0
 [<40146bc3>] pdflush+0x0/0x1b5
 [<40146ce1>] pdflush+0x11e/0x1b5
 [<40146564>] wb_kupdate+0x0/0xe0
 [<4012be6d>] kthread+0xc1/0xec
 [<4012bdac>] kthread+0x0/0xec
 [<401038b3>] kernel_thread_helper+0x7/0x10
 =======================

Thanks,
Rakesh



      

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