Bug#576077: linux-image-2.6.32-trunk-amd64: btrfs allocation failed while accessing from fslint
Hi Rob,
Rob wrote:
> [60921.440540] btrfs allocation failed flags 2, wanted 4096
> [60921.440545] space_info has 4128768 free, is not full
> [60921.440548] space_info total=4194304, pinned=0, delalloc=0, may_use=0, used=0, root=0, super=65536, reserved=0
Hm, doesn't look like you're low on space. But:
[...]
> [60921.440600] kernel BUG at /build/buildd-linux-2.6_2.6.32-5-amd64-9RvY2G/linux-2.6-2.6.32/debian/build/source_amd64_none/fs/btrfs/volumes.c:2389!
[...]
> [60921.440771] [<ffffffffa0da713b>] ? btrfs_alloc_chunk+0x75/0x86 [btrfs]
> [60921.440777] [<ffffffff810e3a5d>] ? virt_to_head_page+0x9/0x2b
> [60921.440787] [<ffffffffa0d78f85>] ? do_chunk_alloc+0x17f/0x1de [btrfs]
> [60921.440798] [<ffffffffa0d7af2e>] ? btrfs_reserve_extent+0xb6/0x1cf [btrfs]
> [60921.440809] [<ffffffffa0d9f60e>] ? merge_state+0x98/0x106 [btrfs]
> [60921.440820] [<ffffffffa0d7b0a1>] ? btrfs_alloc_free_block+0x5a/0x1a9 [btrfs]
> [60921.440832] [<ffffffffa0d9f225>] ? test_range_bit+0x50/0xd3 [btrfs]
[...]
> [60921.440993] Code: 75 2f e9 92 01 00 00 48 63 c5 48 83 c0 02 48 c1 e0 04 49 8b 34 04 4c 01 be a0 00 00 00 48 8b 7c 24 20 e8 35 fe ff ff 85 c0 74 04 <0f> 0b eb fe ff c5 41 3b 6c 24 18 7c cf 48 8d 73 30 31 ff eb 3e
> [60921.441025] RIP [<ffffffffa0da53f2>] __finish_chunk_alloc+0x92/0x20f [btrfs]
> [60921.441036] RSP <ffff8801cba19818>
It still looks vaguely reminiscent of the bug fixed by
v3.1-rc1~82^2~25^2~8 (Btrfs: fix BUG_ON() caused by ENOSPC when
relocating space, 2011-07-15).
Was this reproducible? If so, could you try v3.1-rc1 or later[1]?
Sorry for the trouble,
Jonathan
[1] http://kernel-handbook.alioth.debian.org/ch-common-tasks.html#s-kernel-org-package
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