ext4: perform dax_device lookup at mount

Browse source

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>

...

This commit is contained in:

Dan Williams 2017-08-24 16:42:48 -07:00

parent 8cf037a8b2

commit 5e405595e5

3 changed files with 8 additions and 8 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

1

fs/ext4/ext4.h

View file

11

fs/ext4/inode.c

View file

4

fs/ext4/super.c

View file