Revert "Remove fastwrite mutex" #4586
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This reverts commit b10695c which very likely introduce a difficult to reproduce regression in the vdev_pending_fastwrite accounting. This was removed solely as a potential optimization so it's being reverted in order to resolve this issue. Signed-off-by: Brian Behlendorf <[email protected]> Issue openzfs#4267
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As shown by the Debian 8 test results this doesn't address the issue. |
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This reverts commit b10695c which
very likely introduce a difficult to reproduce regression in the
vdev_pending_fastwrite accounting. This was removed solely as
a potential optimization so it's being reverted in order to resolve
this issue.
Signed-off-by: Brian Behlendorf [email protected]
Issue #4267