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| author | Darrick J. Wong <djwong@kernel.org> | 2022-11-29 04:24:35 +0300 |
|---|---|---|
| committer | Darrick J. Wong <djwong@kernel.org> | 2022-11-29 04:24:35 +0300 |
| commit | c2beff99eb03866df6fdbd3a93b08fd27eb8bf5c (patch) | |
| tree | c3d0a1f8b6b0750cc5549d0e2a7c749d7d4bc821 /fs/xfs/xfs_error.c | |
| parent | 7dd73802f97d2a1602b1cf5c1d6623fb08cb15c5 (diff) | |
| download | linux-c2beff99eb03866df6fdbd3a93b08fd27eb8bf5c.tar.xz | |
xfs: add debug knob to slow down writeback for fun
Add a new error injection knob so that we can arbitrarily slow down
writeback to test for race conditions and aberrant reclaim behavior if
the writeback mechanisms are slow to issue writeback. This will enable
functional testing for the ifork sequence counters introduced in commit
745b3f76d1c8 ("xfs: maintain a sequence count for inode fork
manipulations").
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Diffstat (limited to 'fs/xfs/xfs_error.c')
| -rw-r--r-- | fs/xfs/xfs_error.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/fs/xfs/xfs_error.c b/fs/xfs/xfs_error.c index dea3c0649d2f..2d6e3c718e03 100644 --- a/fs/xfs/xfs_error.c +++ b/fs/xfs/xfs_error.c @@ -60,6 +60,7 @@ static unsigned int xfs_errortag_random_default[] = { XFS_RANDOM_LARP, XFS_RANDOM_DA_LEAF_SPLIT, XFS_RANDOM_ATTR_LEAF_TO_NODE, + XFS_RANDOM_WB_DELAY_MS, }; struct xfs_errortag_attr { @@ -175,6 +176,7 @@ XFS_ERRORTAG_ATTR_RW(ag_resv_fail, XFS_ERRTAG_AG_RESV_FAIL); XFS_ERRORTAG_ATTR_RW(larp, XFS_ERRTAG_LARP); XFS_ERRORTAG_ATTR_RW(da_leaf_split, XFS_ERRTAG_DA_LEAF_SPLIT); XFS_ERRORTAG_ATTR_RW(attr_leaf_to_node, XFS_ERRTAG_ATTR_LEAF_TO_NODE); +XFS_ERRORTAG_ATTR_RW(wb_delay_ms, XFS_ERRTAG_WB_DELAY_MS); static struct attribute *xfs_errortag_attrs[] = { XFS_ERRORTAG_ATTR_LIST(noerror), @@ -218,6 +220,7 @@ static struct attribute *xfs_errortag_attrs[] = { XFS_ERRORTAG_ATTR_LIST(larp), XFS_ERRORTAG_ATTR_LIST(da_leaf_split), XFS_ERRORTAG_ATTR_LIST(attr_leaf_to_node), + XFS_ERRORTAG_ATTR_LIST(wb_delay_ms), NULL, }; ATTRIBUTE_GROUPS(xfs_errortag); @@ -268,6 +271,19 @@ xfs_errortag_valid( } bool +xfs_errortag_enabled( + struct xfs_mount *mp, + unsigned int tag) +{ + if (!mp->m_errortag) + return false; + if (!xfs_errortag_valid(tag)) + return false; + + return mp->m_errortag[tag] != 0; +} + +bool xfs_errortag_test( struct xfs_mount *mp, const char *expression, |