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xfs: stress XFS delalloc indirect block reservations

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This test is based on generic/033, which originally used zero range
operations to reproduce indlen reservation problems. Zero range now
includes a pagecache flush before it updates extents, which means
generic/033 is no longer able to reproduce the problem it was
originally written to test.

Create a new test that uses an XFS-specific mechanism (in DEBUG
mode) to induce delalloc extent splits and reproduce the problem
originally reproduced by generic/033. In addition, update the test
to include a larger buffered write pattern that is known to
reproduce premature indlen exhaustion on delalloc extents.

Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Eryu Guan <eguan@redhat.com>
Signed-off-by: Eryu Guan <eguan@redhat.com>
This commit is contained in:
Brian Foster
2017-02-13 10:15:53 -05:00
committed by Eryu Guan
parent 0e13e40b24
commit e78ae074b2
3 changed files with 112 additions and 0 deletions
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tests/xfs/196.out
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QA output created by 196
Silence is golden.