Re: kernel BUG at extent-tree.c:3162 (get_restripe_target)

2012-04-06 Thread Ilya Dryomov
On Fri, Apr 06, 2012 at 10:52:13AM -0500, Mitch Harder wrote:
> On Fri, Apr 6, 2012 at 10:43 AM, David Sterba  wrote:
> > On Fri, Apr 06, 2012 at 10:33:04AM -0500, Mitch Harder wrote:
> >> I'm consistently hitting the BUG_ON in the new get_restripe_target
> >> function that was added by "[PATCH 4/8] Btrfs: add
> >> get_restripe_target() helper" when trying to initially mount a btrfs
> >> partition.
> >>
> >> Lines fs/btrfs/extent-tree.c:3161-3162:
> >>
> >>       BUG_ON(!mutex_is_locked(&fs_info->volume_mutex) &&
> >>              !spin_is_locked(&fs_info->balance_lock));
> >
> > Is it a single CPU machine? See
> >
> > http://www.spinics.net/lists/linux-btrfs/msg15884.html
> >
> 
> Thanks!
> 
> Yes, this is a single CPU machine.  I'll test the solution from that thread.

Sorry about that.  I'm going to hold off a bit to see if there will be
any objections to v2 from that thread, but we will definitely do
something about this by rc3 or rc4 at worst.

Thanks,

Ilya
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Re: kernel BUG at extent-tree.c:3162 (get_restripe_target)

2012-04-06 Thread Mitch Harder
On Fri, Apr 6, 2012 at 10:43 AM, David Sterba  wrote:
> On Fri, Apr 06, 2012 at 10:33:04AM -0500, Mitch Harder wrote:
>> I'm consistently hitting the BUG_ON in the new get_restripe_target
>> function that was added by "[PATCH 4/8] Btrfs: add
>> get_restripe_target() helper" when trying to initially mount a btrfs
>> partition.
>>
>> Lines fs/btrfs/extent-tree.c:3161-3162:
>>
>>       BUG_ON(!mutex_is_locked(&fs_info->volume_mutex) &&
>>              !spin_is_locked(&fs_info->balance_lock));
>
> Is it a single CPU machine? See
>
> http://www.spinics.net/lists/linux-btrfs/msg15884.html
>

Thanks!

Yes, this is a single CPU machine.  I'll test the solution from that thread.
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Re: kernel BUG at extent-tree.c:3162 (get_restripe_target)

2012-04-06 Thread David Sterba
On Fri, Apr 06, 2012 at 10:33:04AM -0500, Mitch Harder wrote:
> I'm consistently hitting the BUG_ON in the new get_restripe_target
> function that was added by "[PATCH 4/8] Btrfs: add
> get_restripe_target() helper" when trying to initially mount a btrfs
> partition.
> 
> Lines fs/btrfs/extent-tree.c:3161-3162:
> 
>   BUG_ON(!mutex_is_locked(&fs_info->volume_mutex) &&
>  !spin_is_locked(&fs_info->balance_lock));

Is it a single CPU machine? See

http://www.spinics.net/lists/linux-btrfs/msg15884.html

david
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kernel BUG at extent-tree.c:3162 (get_restripe_target)

2012-04-06 Thread Mitch Harder
I'm consistently hitting the BUG_ON in the new get_restripe_target
function that was added by "[PATCH 4/8] Btrfs: add
get_restripe_target() helper" when trying to initially mount a btrfs
partition.

Lines fs/btrfs/extent-tree.c:3161-3162:

BUG_ON(!mutex_is_locked(&fs_info->volume_mutex) &&
   !spin_is_locked(&fs_info->balance_lock));

The kernel is a 3.3.1 kernel merged with the for-linus branch (for the
3.4_rc kernel) of Chris Mason's git repo.

If I boot with an older 3.2.10 kernel (which was merged with the
3.3_rc for-linus branch), the partition mounts without error, and
btrfsck reports no errors.

The partition seems to behave normally under use on the 3.2.10 kernel.

This computer has gone through a few hard reboots recently.  I'm not
sure if the hard reboots have left some inconsistencies, but if so,
they are not showing up on the 3.2.10 kernel.

[   66.233463] device fsid 43129e18-c745-476c-ba48-c6bea0d71e56 devid
1 transid 151 /dev/sdc1
[   66.235090] btrfs: force lzo compression
[   66.235097] btrfs: enabling auto defrag
[   66.235099] btrfs: disk space caching is enabled
[   66.310693] [ cut here ]
[   66.310802] kernel BUG at fs/btrfs/extent-tree.c:3162!
[   66.310905] invalid opcode:  [#1]
[   66.311042] Modules linked in:
[   66.311178]
[   66.311274] Pid: 2993, comm: mount Not tainted 3.3.1-git-local+ #1
  /MS-6570
[   66.311549] EIP: 0060:[] EFLAGS: 00010246 CPU: 0
[   66.311573] EIP is at get_restripe_target+0x86/0x90
[   66.311573] EAX: 0001 EBX: 0001 ECX:  EDX: 0001
[   66.311573] ESI: 0001 EDI: f6227780 EBP: f4d9dc80 ESP: f4d9dc7c
[   66.311573]  DS: 007b ES: 007b FS:  GS: 00e0 SS: 0068
[   66.311573] Process mount (pid: 2993, ti=f4d9c000 task=f5f5e180
task.ti=f4d9c000)
[   66.311573] Stack:
[   66.311573]  0001 f4d9dca4 c12e1693   0001
 f6379000
[   66.311573]  f31d f61b5400 f4d9dcb0 c12e1797 0001 f4d9dd38
c12e8a3a f31d
[   66.311573]     f4d9dd28 f31d f61b5400
0033 f61b5510
[   66.311573] Call Trace:
[   66.311573]  [] btrfs_reduce_alloc_profile+0x43/0xe0
[   66.311573]  [] get_alloc_profile+0x67/0x70
[   66.311573]  [] btrfs_read_block_groups+0x4fa/0x650
[   66.311573]  [] open_ctree+0x10e0/0x18b0
[   66.311573]  [] btrfs_mount+0x501/0x8e0
[   66.311573]  [] ? free_pages_prepare+0xc5/0x120
[   66.311573]  [] ? __free_pages+0x25/0x30
[   66.311573]  [] ? free_pages+0x2f/0x40
[   66.311573]  [] mount_fs+0x35/0x180
[   66.311573]  [] ? kstrdup+0x3e/0x50
[   66.311573]  [] vfs_kern_mount+0x4b/0xb0
[   66.311573]  [] do_kern_mount+0x39/0xd0
[   66.311573]  [] do_mount+0x58a/0x670
[   66.311573]  [] ? __get_free_pages+0x26/0x30
[   66.311573]  [] ? copy_mount_options+0x39/0x110
[   66.311573]  [] sys_mount+0x66/0xa0
[   66.311573]  [] sysenter_do_call+0x12/0x22
[   66.311573] Code: b6 00 00 00 00 31 c0 31 d2 83 e3 04 74 cc f6 81
cd 00 00 00 01 74 c3 8b 99 c4 00 00 00 8b 91 c8 00 00 00 89 d8 83 c8
04 5b 5d c3 <0f> 0b 90 8d b4 26 00 00 00 00 55 8d 88 f0 fe ff ff 89 e5
53 8b
[   66.311573] EIP: [] get_restripe_target+0x86/0x90 SS:ESP
0068:f4d9dc7c
[   66.318545] ---[ end trace 0c923804dee2b085 ]---
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