BUG: soft lockup detected on CPU#1!

[Justin Piszcz]

On Tue, 10 Feb 2009, raksac at 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
>
>
>
>
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>

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