On Wed, Dec 30, 2015 at 04:02:04PM +0000, fdman...@kernel.org wrote: > From: Filipe Manana <fdman...@suse.com> > > While running a stress test I ran into the following trace/transaction > abort: > > [471626.672243] ------------[ cut here ]------------ > [471626.673322] WARNING: CPU: 9 PID: 19107 at fs/btrfs/extent-tree.c:3740 > btrfs_write_dirty_block_groups+0x17c/0x214 [btrfs]() > [471626.675492] BTRFS: Transaction aborted (error -2) > [471626.676748] Modules linked in: btrfs dm_flakey dm_mod crc32c_generic xor > raid6_pq nfsd auth_rpcgss oid_registry nfs_acl nfs lockd grace fscache sunrpc > loop fuse parport_pc i2c_piix > [471626.688802] CPU: 14 PID: 19107 Comm: fsstress Tainted: G W > 4.3.0-rc5-btrfs-next-17+ #1 > [471626.690148] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS > rel-1.8.1-0-g4adadbd-20150316_085822-nilsson.home.kraxel.org 04/01/2014 > [471626.691901] 0000000000000000 ffff880016037cf0 ffffffff812566f4 > ffff880016037d38 > [471626.695009] ffff880016037d28 ffffffff8104d0a6 ffffffffa040c84e > 00000000fffffffe > [471626.697490] ffff88011fe855f8 ffff88000c484cb0 ffff88000d195000 > ffff880016037d90 > [471626.699201] Call Trace: > [471626.699804] [<ffffffff812566f4>] dump_stack+0x4e/0x79 > [471626.701049] [<ffffffff8104d0a6>] warn_slowpath_common+0x9f/0xb8 > [471626.702542] [<ffffffffa040c84e>] ? > btrfs_write_dirty_block_groups+0x17c/0x214 [btrfs] > [471626.704326] [<ffffffff8104d107>] warn_slowpath_fmt+0x48/0x50 > [471626.705636] [<ffffffffa0403717>] ? > write_one_cache_group.isra.32+0x77/0x82 [btrfs] > [471626.707048] [<ffffffffa040c84e>] > btrfs_write_dirty_block_groups+0x17c/0x214 [btrfs] > [471626.708616] [<ffffffffa048a50a>] commit_cowonly_roots+0x1d7/0x25a [btrfs] > [471626.709950] [<ffffffffa041e34a>] btrfs_commit_transaction+0x4c4/0x991 > [btrfs] > [471626.711286] [<ffffffff81081c61>] ? signal_pending_state+0x31/0x31 > [471626.712611] [<ffffffffa03f6df4>] btrfs_sync_fs+0x145/0x1ad [btrfs] > [471626.715610] [<ffffffff811962a2>] ? SyS_tee+0x226/0x226 > [471626.716718] [<ffffffff811962c2>] sync_fs_one_sb+0x20/0x22 > [471626.717672] [<ffffffff8116fc01>] iterate_supers+0x75/0xc2 > [471626.718800] [<ffffffff8119669a>] sys_sync+0x52/0x80 > [471626.719990] [<ffffffff8147cd97>] entry_SYSCALL_64_fastpath+0x12/0x6f > [471626.721835] ---[ end trace baf57f43d76693f4 ]--- > [471626.722954] BTRFS: error (device sdc) in > btrfs_write_dirty_block_groups:3740: errno=-2 No such entry > > This is a very rare situation and it happened due to a race between a free > space endio worker and writing the space caches for dirty block groups at > a transaction's commit critical section. The steps leading to this are: >
Ugh, thanks Filipe. I'll get this one into integration after I get back from vacation (I'm out next week). -chris -- 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
