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Darrick J. Wong authored
Add a new error injection knob so that we can arbitrarily slow down pagecache writes 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 304a68b9 ("xfs: use iomap_valid method to detect stale cached iomaps") that fixes write racing with reclaim writeback. Signed-off-by: Darrick J. Wong <djwong@kernel.org> Reviewed-by: Dave Chinner <dchinner@redhat.com>
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