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author | Josef Bacik <jbacik@fusionio.com> | 2012-09-14 15:22:38 (GMT) |
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committer | Chris Mason <chris.mason@fusionio.com> | 2012-10-04 13:39:58 (GMT) |
commit | 98114659e0d467e2c0ee6f24f2429329328fc312 (patch) | |
tree | 6286d0eb87f22cc51a6f38503f6e82beb5fc0dfd /fs/btrfs/extent_map.h | |
parent | 6bbe3a9c805fcb8cd8d396dafd32078181a7cdd5 (diff) | |
download | linux-98114659e0d467e2c0ee6f24f2429329328fc312.tar.xz |
Btrfs: fix race with freeze and free space inodes
So we start our freeze, somebody comes in and does an fsync() on a file
where we have to commit a transaction for whatever reason, and we will
deadlock because the freeze is waiting on FS_FREEZE people to stop writing
to the file system, but the transaction is waiting for its free space inodes
to be written out, which are in turn waiting on sb_start_intwrite while
trying to write the file extents. To fix this we'll just skip the
sb_start_intwrite() if we TRANS_JOIN_NOLOCK since we're being waited on by a
transaction commit so we're safe wrt to freeze and this will keep us from
deadlocking. Thanks,
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Diffstat (limited to 'fs/btrfs/extent_map.h')
0 files changed, 0 insertions, 0 deletions