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| author |   Dan Williams <dan.j.williams@intel.com> | 2017-08-24 15:12:50 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2017-08-31 09:31:47 -0700 |
| commit | 486aff5e04823bb1e60c4045226eb244024b8420 (patch) | |
| tree | c0cc960b998086e92873d918f203a5e737e97db6 /tools/perf/scripts/python/call-graph-from-sql.py | |
| parent | dax: introduce a fs_dax_get_by_bdev() helper (diff) | |
| download | wireguard-linux-486aff5e04823bb1e60c4045226eb244024b8420.tar.xz wireguard-linux-486aff5e04823bb1e60c4045226eb244024b8420.zip | |
xfs: perform dax_device lookup at mount
The ->iomap_begin() operation is a hot path, so cache the
fs_dax_get_by_host() result at mount time to avoid the incurring the
hash lookup overhead on a per-i/o basis.
Reported-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-sql.py')
0 files changed, 0 insertions, 0 deletions