Add zfs_vdev_parallel_open_enabled module option #6093
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@behlendorf, thanks for your PR! By analyzing the history of the files in this pull request, we identified @grwilson, @FransUrbo and @ahrens to be potential reviewers. |
Parallel vdev open causes the driver to deadlock when running ZFS on top of a zvol with something in between, including, but not limited to the loop device. Such configurations are historically unsupported. However, enough people have requested the capability over the years that we ought to give them a knob to make the configuration work in most instances. We have tests for the direct case, but the indirect case continues to be unsupported. Signed-off-by: Richard Yao <ryao@gentoo.org>
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Closing. This will not avoid the issue. |
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Parallel vdev open causes the driver to deadlock when running ZFS on top
of a zvol with something in between, including, but not limited to the
loop devices. Such configurations are historically unsupported. However,
enough people have requested the capability over the years that we ought
to give them a knob to make the configuration work in most instances. We
have tests for the direct case, but the indirect case continues to be
unsupported.