On 07/01/2011 03:38 PM, Stephane Chazelas wrote: > 2011-07-01 15:07:52 -0400, Josef Bacik: >> On 07/01/2011 01:44 PM, Stephane Chazelas wrote: > [...] >>> [ 8203.192146] kernel BUG at >>> /media/data/mattems/src/linux-2.6-3.0.0~rc5/debian/build/source_amd64_none/fs/btrfs/inode.c:1583! >>> [ 8203.192210] invalid opcode: 0000 [#1] SMP > [...] >>> [ 8203.193219] Process btrfs-fixup-0 (pid: 747, threadinfo >>> ffff8801483fe000, task ffff88014672efa0) > [...] >>> [ 8203.193538] [<ffffffffa01669fa>] ? worker_loop+0x186/0x4a1 [btrfs] >>> [ 8203.193579] [<ffffffff813369ca>] ? schedule+0x5ed/0x61a >>> [ 8203.193624] [<ffffffffa0166874>] ? btrfs_queue_worker+0x24a/0x24a >>> [btrfs] >>> [ 8203.193673] [<ffffffffa0166874>] ? btrfs_queue_worker+0x24a/0x24a >>> [btrfs] >>> [ 8203.193714] [<ffffffff8105faed>] ? kthread+0x7a/0x82 >>> [ 8203.193750] [<ffffffff8133e524>] ? kernel_thread_helper+0x4/0x10 >>> [ 8203.193788] [<ffffffff8105fa73>] ? kthread_worker_fn+0x147/0x147 >>> [ 8203.193825] [<ffffffff8133e520>] ? gs_change+0x13/0x13 >>> [ 8203.193859] Code: 41 b8 50 00 00 00 4c 89 f1 e8 d5 3b 01 00 48 89 df e8 >>> fb ac f6 e0 ba 01 00 00 00 4c 89 ee 4c 89 e7 e8 ce 05 01 00 e9 4e ff ff ff >>> <0f> 0b eb fe 48 8b 3c 24 41 b8 50 00 00 00 4c 89 f1 4c 89 fa 48 >>> [ 8203.194087] RIP [<ffffffffa014b0f4>] >>> btrfs_writepage_fixup_worker+0xdb/0x120 [btrfs] >>> [ 8203.194160] RSP <ffff8801483ffde0> >>> [ 8203.194907] ---[ end trace 9744d33381de3d04 ]--- >>> >>> Should I be worried? >>> >> >> A little, can you reproduce it? Thanks, > [...] > > Well no. I have no idea what triggered it. It was in the middle > of doing an rsync from one compressed btrfs fs on 3 HDs (1 > partition and 2 HDs) onto a btrfs FS on one LUKS device > (compressed as well). That rsync is still happily ongoing and > the server looks fine. Nothing else happening. > > What's btrfs-fixup meant to do? >
It happens when we get a page that is dirty but wasn't setup properly with an ordered extent. So somebody did set_page_dirty() without setting the extent as delalloc. I've been looking at all the places where we do this but I've not found a culprit yet. Thanks, Josef -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
