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authorBrian Foster <bfoster@redhat.com>2023-04-03 08:38:51 -0400
committerKent Overstreet <kent.overstreet@linux.dev>2024-02-15 22:08:37 -0500
commit7844bffb38a4369150df3b642978f1d6d8060e2d (patch)
treed6252e691f130f6d7500d9a602c7f2acfaa986cf /fs/xfs/xfs_mount.h
parent619b6529e9e7d2dd8ee02256f1542ab3fdff7d1b (diff)
xfs: add nodataio mount option to skip all data I/Oxfs_no_data_io
When mounted with nodataio, add the NOSUBMIT iomap flag to all data mappings passed into the iomap layer. This causes iomap to skip all data I/O submission and thus facilitates metadata only performance testing. For experimental use only. Only tested insofar as fsstress runs for a few minutes without blowing up. Signed-off-by: Brian Foster <bfoster@redhat.com>
Diffstat (limited to 'fs/xfs/xfs_mount.h')
-rw-r--r--fs/xfs/xfs_mount.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index 503fe3c7edbf..952add9dcd6f 100644
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -291,6 +291,7 @@ typedef struct xfs_mount {
#define XFS_FEAT_NREXT64 (1ULL << 26) /* large extent counters */
/* Mount features */
+#define XFS_FEAT_NODATAIO (1ULL << 47) /* skip all data I/O */
#define XFS_FEAT_NOATTR2 (1ULL << 48) /* disable attr2 creation */
#define XFS_FEAT_NOALIGN (1ULL << 49) /* ignore alignment */
#define XFS_FEAT_ALLOCSIZE (1ULL << 50) /* user specified allocation size */
@@ -360,6 +361,7 @@ __XFS_HAS_FEAT(large_extent_counts, NREXT64)
* bit inodes and read-only state, are kept as operational state rather than
* features.
*/
+__XFS_HAS_FEAT(nodataio, NODATAIO)
__XFS_HAS_FEAT(noattr2, NOATTR2)
__XFS_HAS_FEAT(noalign, NOALIGN)
__XFS_HAS_FEAT(allocsize, ALLOCSIZE)