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Date: Thu, 8 Jul 2010 10:31:09 -0400
From: Chris Mason <chris.mason@oracle.com>
To: Johannes Hirte <johannes.hirte@fem.tu-ilmenau.de>
Cc: linux-kernel@vger.kernel.org, linux-btrfs@vger.kernel.org,
       zheng.yan@oracle.com
Subject: Re: kernel BUG at fs/btrfs/extent-tree.c:1353
Message-ID: <20100708143109.GR15984@think>
Mail-Followup-To: Chris Mason <chris.mason@oracle.com>,
	Johannes Hirte <johannes.hirte@fem.tu-ilmenau.de>,
	linux-kernel@vger.kernel.org, linux-btrfs@vger.kernel.org,
	zheng.yan@oracle.com
References: <201007081627.24654.johannes.hirte@fem.tu-ilmenau.de>
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Neither Yan nor I have been able to reproduce this locally, but a few
people have now hit it.  Johannes, are you available to try out a
debugging kernel to try and track this down?

-chris

On Thu, Jul 08, 2010 at 04:27:23PM +0200, Johannes Hirte wrote:
> When doing a 'rm -r /var/tmp/portage/sys-devel' I get the following Oops:
> 
> ------------[ cut here ]------------
> kernel BUG at fs/btrfs/extent-tree.c:1353!
> invalid opcode: 0000 [#1] PREEMPT SMP 
> last sysfs file: 
> /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0A:00/power_supply/BAT0/charge_full
> Modules linked in: snd_seq_dummy snd_seq_oss snd_seq_midi_event snd_seq 
> snd_seq_device snd_pcm_oss snd_mixer_oss nfs lockd nfs_acl auth_rpcgss sunrpc 
> sco rfcomm bnep l2cap crc16 xts gf128mul usb_storage dm_crypt dm_mod coretemp 
> hwmon acpi_cpufreq mperf snd_hda_codec_realtek uvcvideo iwl3945 snd_hda_intel 
> snd_hda_codec iwlcore videodev r8169 snd_hwdep btusb snd_pcm v4l1_compat 
> mac80211 snd_timer bluetooth snd mii cfg80211 soundcore sg rfkill ac i2c_i801 
> snd_page_alloc uhci_hcd battery [last unloaded: microcode]
> 
> Pid: 2358, comm: rm Not tainted 2.6.35-rc4 #32 M912/M912
> EIP: 0060:[<c10c383b>] EFLAGS: 00010202 CPU: 1
> EIP is at lookup_inline_extent_backref+0xf2/0x406
> EAX: 00000001 EBX: 00000007 ECX: 00000000 EDX: 00000000
> ESI: 00000004 EDI: f7268150 EBP: 00000004 ESP: f5aa5d08
>  DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
> Process rm (pid: 2358, ti=f5aa4000 task=f6f0fa70 task.ti=f5aa4000)
> Stack:
>  f702f8c0 f744e080 f665f380 000000b0 00000000 00000000 ffffffff f6c80f00
> <0> f744e080 c10ec226 e98acfff f6c98000 00001001 0e987000 00000004 00000000
> <0> 00000850 040e9870 a8000000 00001000 00000000 00000007 00000000 0e987000
> Call Trace:
>  [<c10ec226>] ? set_extent_dirty+0x19/0x1d
>  [<c10c5081>] ? __btrfs_free_extent+0xda/0x675
>  [<c10c88bf>] ? run_clustered_refs+0x699/0x6d7
>  [<c10d239f>] ? btrfs_mark_buffer_dirty+0xa3/0xef
>  [<c1101454>] ? btrfs_find_ref_cluster+0xf9/0x13a
>  [<c10c89bc>] ? btrfs_run_delayed_refs+0xbf/0x155
>  [<c10d3a73>] ? __btrfs_end_transaction+0x53/0x16c
>  [<c10db480>] ? btrfs_delete_inode+0x166/0x17e
>  [<c102280d>] ? get_parent_ip+0x8/0x19
>  [<c108fe5c>] ? generic_delete_inode+0x6f/0xbd
>  [<c108f5b3>] ? iput+0x46/0x48
>  [<c10893a8>] ? do_unlinkat+0xc7/0x109
>  [<c102280d>] ? get_parent_ip+0x8/0x19
>  [<c10822e3>] ? fput+0x12/0x15c
>  [<c10a2f30>] ? dnotify_flush+0x41/0xc2
>  [<c107fe85>] ? filp_close+0x4c/0x52
>  [<c107feed>] ? sys_close+0x62/0x9b
>  [<c1002550>] ? sysenter_do_call+0x12/0x26
> Code: 80 4e 68 02 8d 4c 24 43 89 f8 6a 01 ff 74 24 1c ff 74 24 08 8b 54 24 38 e8 
> 01 c2 ff ff 83 c4 0c 83 f8 00 0f 8c e1 02 00 00 74 02 <0f> 0b 8b 04 24 8b 34 24 
> 8b 00 8b 56 20 89 44 24 08 e8 2e fa ff 
> EIP: [<c10c383b>] lookup_inline_extent_backref+0xf2/0x406 SS:ESP 0068:f5aa5d08
> ---[ end trace d97601f0b455ca72 ]---
> note: rm[2358] exited with preempt_count 2
> BUG: scheduling while atomic: rm/2358/0x10000003
> Modules linked in: snd_seq_dummy snd_seq_oss snd_seq_midi_event snd_seq 
> snd_seq_device snd_pcm_oss snd_mixer_oss nfs lockd nfs_acl auth_rpcgss sunrpc 
> sco rfcomm bnep l2cap crc16 xts gf128mul usb_storage dm_crypt dm_mod coretemp 
> hwmon acpi_cpufreq mperf snd_hda_codec_realtek uvcvideo iwl3945 snd_hda_intel 
> snd_hda_codec iwlcore videodev r8169 snd_hwdep btusb snd_pcm v4l1_compat 
> mac80211 snd_timer bluetooth snd mii cfg80211 soundcore sg rfkill ac i2c_i801 
> snd_page_alloc uhci_hcd battery [last unloaded: microcode]
> Pid: 2358, comm: rm Tainted: G      D     2.6.35-rc4 #32
> Call Trace:
>  [<c12de6b3>] ? schedule+0x88/0x332
>  [<c10237c1>] ? __cond_resched+0xf/0x19
>  [<c12de9e2>] ? _cond_resched+0x12/0x18
>  [<c106ceec>] ? unmap_vmas+0x4e7/0x534
>  [<c1070c8f>] ? exit_mmap+0x64/0xa4
>  [<c1026089>] ? mmput+0x21/0x96
>  [<c102938e>] ? exit_mm+0xe7/0xf0
>  [<c12dfa28>] ? _raw_spin_unlock_irqrestore+0x1a/0x24
>  [<c103aaa1>] ? hrtimer_try_to_cancel+0x31/0x3a
>  [<c102a42e>] ? do_exit+0x17b/0x57d
>  [<c1028e78>] ? kmsg_dump+0x81/0xf9
>  [<c1002d06>] ? do_invalid_op+0x0/0x76
>  [<c1004fa0>] ? oops_end+0x72/0x75
>  [<c1002d6f>] ? do_invalid_op+0x69/0x76
>  [<c10c383b>] ? lookup_inline_extent_backref+0xf2/0x406
>  [<c10bdc9a>] ? generic_bin_search.clone.0+0x145/0x150
>  [<c10bcf30>] ? btrfs_cow_block+0x106/0x112
>  [<c10bdcdc>] ? bin_search+0x37/0x3d
>  [<c10bfe33>] ? btrfs_search_slot+0x405/0x477
>  [<c12e031a>] ? error_code+0x66/0x6c
>  [<c1002d06>] ? do_invalid_op+0x0/0x76
>  [<c10c383b>] ? lookup_inline_extent_backref+0xf2/0x406
>  [<c10ec226>] ? set_extent_dirty+0x19/0x1d
>  [<c10c5081>] ? __btrfs_free_extent+0xda/0x675
>  [<c10c88bf>] ? run_clustered_refs+0x699/0x6d7
>  [<c10d239f>] ? btrfs_mark_buffer_dirty+0xa3/0xef
>  [<c1101454>] ? btrfs_find_ref_cluster+0xf9/0x13a
>  [<c10c89bc>] ? btrfs_run_delayed_refs+0xbf/0x155
>  [<c10d3a73>] ? __btrfs_end_transaction+0x53/0x16c
>  [<c10db480>] ? btrfs_delete_inode+0x166/0x17e
>  [<c102280d>] ? get_parent_ip+0x8/0x19
>  [<c108fe5c>] ? generic_delete_inode+0x6f/0xbd
>  [<c108f5b3>] ? iput+0x46/0x48
>  [<c10893a8>] ? do_unlinkat+0xc7/0x109
>  [<c102280d>] ? get_parent_ip+0x8/0x19
>  [<c10822e3>] ? fput+0x12/0x15c
>  [<c10a2f30>] ? dnotify_flush+0x41/0xc2
>  [<c107fe85>] ? filp_close+0x4c/0x52
>  [<c107feed>] ? sys_close+0x62/0x9b
>  [<c1002550>] ? sysenter_do_call+0x12/0x26
--
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