diff options
| 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 /fs/xfs/xfs_buf.h | |
| parent | 78f35473508118df5ea04b9515ac3f1aaec0a980 (diff) | |
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 'fs/xfs/xfs_buf.h')
| -rw-r--r-- | fs/xfs/xfs_buf.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/xfs/xfs_buf.h b/fs/xfs/xfs_buf.h index 20721261dae5..bf71507ddb16 100644 --- a/fs/xfs/xfs_buf.h +++ b/fs/xfs/xfs_buf.h @@ -108,6 +108,7 @@ typedef unsigned int xfs_buf_flags_t; typedef struct xfs_buftarg { dev_t bt_dev; struct block_device *bt_bdev; + struct dax_device *bt_daxdev; struct xfs_mount *bt_mount; unsigned int bt_meta_sectorsize; size_t bt_meta_sectormask; @@ -385,7 +386,7 @@ xfs_buf_update_cksum(struct xfs_buf *bp, unsigned long cksum_offset) * Handling of buftargs. */ extern xfs_buftarg_t *xfs_alloc_buftarg(struct xfs_mount *, - struct block_device *); + struct block_device *, struct dax_device *); extern void xfs_free_buftarg(struct xfs_mount *, struct xfs_buftarg *); extern void xfs_wait_buftarg(xfs_buftarg_t *); extern int xfs_setsize_buftarg(xfs_buftarg_t *, unsigned int); |