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| author |   Christoph Hellwig <hch@lst.de> | 2020-09-28 08:51:08 -0700 |
|---|---|---|
| committer |   Darrick J. Wong <darrick.wong@oracle.com> | 2020-09-28 08:51:08 -0700 |
| commit | c3d4ed1abecfcfc801199cfadb71f5b80e025d9e (patch) | |
| tree | e9c9f9b12f6161b19673284bfa80719a115d8b59 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | iomap: Set all uptodate bits for an Uptodate page (diff) | |
| download | wireguard-linux-c3d4ed1abecfcfc801199cfadb71f5b80e025d9e.tar.xz wireguard-linux-c3d4ed1abecfcfc801199cfadb71f5b80e025d9e.zip | |
iomap: Allow filesystem to call iomap_dio_complete without i_rwsem
This is to avoid the deadlock caused in btrfs because of O_DIRECT |
O_DSYNC.
Filesystems such as btrfs require i_rwsem while performing sync on a
file. iomap_dio_rw() is called under i_rw_sem. This leads to a
deadlock because of:
iomap_dio_complete()
generic_write_sync()
btrfs_sync_file()
Separate out iomap_dio_complete() from iomap_dio_rw(), so filesystems
can call iomap_dio_complete() after unlocking i_rwsem.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions