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| author | Dan Williams <dan.j.williams@intel.com> | 2017-08-30 09:43:34 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2017-08-31 09:33:30 -0700 |
| commit | 8cf037a8b22f71c6659bd0246bfaba9e79766f64 (patch) | |
| tree | 29488639a0421bfd6316beb79131630d43039009 /fs/ext2/ext2.h | |
| parent | 486aff5e04823bb1e60c4045226eb244024b8420 (diff) | |
| download | linux-8cf037a8b22f71c6659bd0246bfaba9e79766f64.tar.bz2 | |
ext2: 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.
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: Andreas Dilger <adilger.kernel@dilger.ca>
Reviewed-by: Jan Kara <jack@suse.cz>
Reported-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'fs/ext2/ext2.h')
| -rw-r--r-- | fs/ext2/ext2.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/ext2/ext2.h b/fs/ext2/ext2.h index 23ebb92484c6..28de3edd4f4d 100644 --- a/fs/ext2/ext2.h +++ b/fs/ext2/ext2.h @@ -114,6 +114,7 @@ struct ext2_sb_info { */ spinlock_t s_lock; struct mb_cache *s_ea_block_cache; + struct dax_device *s_daxdev; }; static inline spinlock_t * |