next-20081210: BUG: sleeping function called from invalid context at mm/slub.c:1619 (XFS)

next-20081210: BUG: sleeping function called from invalid context at mm/slub.c:1619 (XFS)

[Alexander Beregalov]

BUG: sleeping function called from invalid context at mm/slub.c:1619
in_atomic(): 1, irqs_disabled(): 0, pid: 8096, name: sh
INFO: lockdep is turned off.
Pid: 8096, comm: sh Tainted: G        W  2.6.28-rc7-next-20081210 #2
Call Trace:
 [<ffffffff80256e5a>] ? __debug_show_held_locks+0x1b/0x24
 [<ffffffff8022fb55>] __might_sleep+0x120/0x122
 [<ffffffff8029c526>] __kmalloc+0x70/0xfc
 [<ffffffff803534d2>] kmem_alloc+0x75/0xd7
 [<ffffffff803350ba>] xfs_fs_vcmn_err+0x46/0x94
 [<ffffffff80335297>] xfs_fs_cmn_err+0x59/0x5e
 [<ffffffff802578a1>] ? trace_hardirqs_on_caller+0x1f/0x15f
 [<ffffffff803434c0>] ? xlog_grant_push_ail+0x26/0xed
 [<ffffffff804e55d3>] ? _spin_lock+0x68/0x70
 [<ffffffff803416e6>] xlog_space_left+0x62/0x6b
 [<ffffffff803434d8>] xlog_grant_push_ail+0x3e/0xed
 [<ffffffff80343c6f>] xfs_log_reserve+0xa8/0xbc
 [<ffffffff8034cc4e>] xfs_trans_reserve+0xe0/0x1bb
 [<ffffffff80350059>] xfs_create+0x138/0x431
 [<ffffffff802ad852>] ? d_rehash+0x23/0x44
 [<ffffffff8035a090>] xfs_vn_mknod+0xc9/0x139
 [<ffffffff8035a11b>] xfs_vn_create+0xb/0xd
 [<ffffffff802a89dd>] vfs_create+0x58/0x7e
 [<ffffffff802a94f7>] do_filp_open+0x249/0x7d0
 [<ffffffff8022fbec>] ? get_parent_ip+0x11/0x41
 [<ffffffff80231651>] ? sub_preempt_count+0xba/0xce
 [<ffffffff802b2a0a>] ? alloc_fd+0x11d/0x12e
 [<ffffffff8029e19e>] do_sys_open+0x53/0xda
 [<ffffffff80224b3d>] ? do_page_fault+0x394/0x887
 [<ffffffff8029e24e>] sys_open+0x1b/0x1d
 [<ffffffff8020b85b>] system_call_fastpath+0x16/0x1b
Filesystem "sda2": xlog_space_left: head behind tail
  tail_cycle = 1802201963, tail_bytes = -690563584
  GH   cycle = 3078, GH   bytes = 69183384

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Re: [xfs-masters] next-20081210: BUG: sleeping function called from invalid context at mm/slub.c:1619 (XFS)

[Christoph Hellwig]

On Thu, Dec 11, 2008 at 01:10:23PM +0300, Alexander Beregalov wrote:
> BUG: sleeping function called from invalid context at mm/slub.c:1619
> in_atomic(): 1, irqs_disabled(): 0, pid: 8096, name: sh
> INFO: lockdep is turned off.
> Pid: 8096, comm: sh Tainted: G        W  2.6.28-rc7-next-20081210 #2
> Call Trace:
>  [<ffffffff80256e5a>] ? __debug_show_held_locks+0x1b/0x24
>  [<ffffffff8022fb55>] __might_sleep+0x120/0x122
>  [<ffffffff8029c526>] __kmalloc+0x70/0xfc
>  [<ffffffff803534d2>] kmem_alloc+0x75/0xd7
>  [<ffffffff803350ba>] xfs_fs_vcmn_err+0x46/0x94
>  [<ffffffff80335297>] xfs_fs_cmn_err+0x59/0x5e

xfs_fs_vcmn_err does a sleeping memory allocation under a spinlock,
nasty.  I have an idea that will get rid of the memory allocation
completely, I'll come back to you once I have hacked something up.

> Filesystem "sda2": xlog_space_left: head behind tail
>   tail_cycle = 1802201963, tail_bytes = -690563584
>   GH   cycle = 3078, GH   bytes = 69183384

This btw is a bug, too..

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