diff options
| author | Brian Foster <bfoster@redhat.com> | 2023-04-03 08:38:51 -0400 |
|---|---|---|
| committer | Kent Overstreet <kent.overstreet@linux.dev> | 2023-05-13 00:22:30 -0400 |
| commit | d24954c8ec3fb2e3dabbf51da27a164be181296b (patch) | |
| tree | becef3543bb20fdc07fe826714a67f43f9a47ffa | |
| parent | d6d8ad8bc799e92a7d10f0726a0935f9a69ccec4 (diff) | |
xfs: add nodataio mount option to skip all data I/O
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>
| -rw-r--r-- | fs/xfs/xfs_iomap.c | 3 | ||||
| -rw-r--r-- | fs/xfs/xfs_mount.h | 2 | ||||
| -rw-r--r-- | fs/xfs/xfs_super.c | 6 |
3 files changed, 10 insertions, 1 deletions
diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c index 285885c308bd..4505ed9eea29 100644 --- a/fs/xfs/xfs_iomap.c +++ b/fs/xfs/xfs_iomap.c @@ -99,6 +99,9 @@ xfs_bmbt_to_iomap( struct xfs_mount *mp = ip->i_mount; struct xfs_buftarg *target = xfs_inode_buftarg(ip); + if (xfs_has_nodataio(mp)) + iomap_flags |= IOMAP_F_NOSUBMIT; + if (unlikely(!xfs_valid_startblock(ip, imap->br_startblock))) return xfs_alert_fsblock_zero(ip, imap); diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h index f3269c0626f0..0f48cd1f6551 100644 --- a/fs/xfs/xfs_mount.h +++ b/fs/xfs/xfs_mount.h @@ -280,6 +280,7 @@ 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 */ @@ -349,6 +350,7 @@ __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) diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c index 4f814f9e12ab..0ef524da8c44 100644 --- a/fs/xfs/xfs_super.c +++ b/fs/xfs/xfs_super.c @@ -121,7 +121,7 @@ enum { Opt_filestreams, Opt_quota, Opt_noquota, Opt_usrquota, Opt_grpquota, Opt_prjquota, Opt_uquota, Opt_gquota, Opt_pquota, Opt_uqnoenforce, Opt_gqnoenforce, Opt_pqnoenforce, Opt_qnoenforce, - Opt_discard, Opt_nodiscard, Opt_dax, Opt_dax_enum, + Opt_discard, Opt_nodiscard, Opt_dax, Opt_dax_enum, Opt_nodataio, }; static const struct fs_parameter_spec xfs_fs_parameters[] = { @@ -166,6 +166,7 @@ static const struct fs_parameter_spec xfs_fs_parameters[] = { fsparam_flag("nodiscard", Opt_nodiscard), fsparam_flag("dax", Opt_dax), fsparam_enum("dax", Opt_dax_enum, dax_param_enums), + fsparam_flag("nodataio", Opt_nodataio), {} }; @@ -1372,6 +1373,9 @@ xfs_fs_parse_param( xfs_fs_warn_deprecated(fc, param, XFS_FEAT_NOATTR2, true); parsing_mp->m_features |= XFS_FEAT_NOATTR2; return 0; + case Opt_nodataio: + parsing_mp->m_features |= XFS_FEAT_NODATAIO; + return 0; default: xfs_warn(parsing_mp, "unknown mount option [%s].", param->key); return -EINVAL; |