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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2010-11-15 06:33:11 +0000 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2010-11-15 06:33:11 +0000 |
| commit | 1bb95834bbcdc969e477a9284cf96c17a4c2616f (patch) | |
| tree | 9cf66b22a611bb6bc78778c05dac72263bb45a23 /fs/xfs/xfs_filestream.c | |
| parent | 85345517fe6d4de27b0d6ca19fef9d28ac947c4a (diff) | |
| parent | a41c73e04673b47730df682446f0d52f95e32a5b (diff) | |
Merge remote branch 'airlied/drm-fixes' into drm-intel-fixes
Diffstat (limited to 'fs/xfs/xfs_filestream.c')
| -rw-r--r-- | fs/xfs/xfs_filestream.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/fs/xfs/xfs_filestream.c b/fs/xfs/xfs_filestream.c index 9b715dce569..9124425b7f2 100644 --- a/fs/xfs/xfs_filestream.c +++ b/fs/xfs/xfs_filestream.c @@ -744,9 +744,15 @@ xfs_filestream_new_ag( * If the file's parent directory is known, take its iolock in exclusive * mode to prevent two sibling files from racing each other to migrate * themselves and their parent to different AGs. + * + * Note that we lock the parent directory iolock inside the child + * iolock here. That's fine as we never hold both parent and child + * iolock in any other place. This is different from the ilock, + * which requires locking of the child after the parent for namespace + * operations. */ if (pip) - xfs_ilock(pip, XFS_IOLOCK_EXCL); + xfs_ilock(pip, XFS_IOLOCK_EXCL | XFS_IOLOCK_PARENT); /* * A new AG needs to be found for the file. If the file's parent |