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| author | Ritesh Harjani <riteshh@linux.ibm.com> | 2019-12-12 11:25:55 +0530 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2019-12-22 23:57:27 -0500 |
| commit | f629afe3369e9885fd6e9cc7a4f514b6a65cf9e9 (patch) | |
| tree | 7f7b3f170985b97099e2c7b9f149ebc0975e41eb /tools/perf/scripts/python/export-to-sqlite.py | |
| parent | 46cf053efec6a3a5f343fead837777efe8252a46 (diff) | |
ext4: fix ext4_dax_read/write inode locking sequence for IOCB_NOWAIT
Apparently our current rwsem code doesn't like doing the trylock, then
lock for real scheme. So change our dax read/write methods to just do the
trylock for the RWF_NOWAIT case.
This seems to fix AIM7 regression in some scalable filesystems upto ~25%
in some cases. Claimed in commit 942491c9e6d6 ("xfs: fix AIM7 regression")
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Matthew Bobrowski <mbobrowski@mbobrowski.org>
Tested-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Signed-off-by: Ritesh Harjani <riteshh@linux.ibm.com>
Link: https://lore.kernel.org/r/20191212055557.11151-2-riteshh@linux.ibm.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'tools/perf/scripts/python/export-to-sqlite.py')
0 files changed, 0 insertions, 0 deletions