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author | Brian Behlendorf <behlendorf1@llnl.gov> | 2017-01-28 12:13:34 -0800 |
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committer | GitHub <noreply@github.com> | 2017-01-28 12:13:34 -0800 |
commit | a32494d22ac25c35c5d26eb0b2607ea68adb93cd (patch) | |
tree | 6aea4fc77bc90bc0ac3bcb542af2589bfbd37b88 /include | |
parent | 3130b84e94717fe9aad67a14defe79bb7f10fa9f (diff) |
Fix suspend Godfather I/Os io_reexecute bits
After resuming a pool the godfather zio could have both the
ZIO_REEXECUTE_NOW and ZIO_REEXECUTE_SUSPEND bits set. This
can occur if some child zios set ZIO_REEXECUTE_NOW while
other set ZIO_REEXECUTE_SUSPEND. The godfather zio can
inherit both flags in zio_notify_parent().
The child zios which assigned the ZIO_REEXECUTE_SUSPEND flag
will be removed from the godfather's child list and added to
the spa->spa_suspend_zio_root child list. While child zios
with the ZIO_REEXECUTE_NOW bit set remain being monitored
by the godfather zio.
When the godfather zio executes zio_done() the presence of
the ZIO_REEXECUTE_SUSPEND bit results in all io_reexecute
being cleared. These child zios will then not be re-executed
and instead will be destroyed and lost.
The most straight forward way to address this situation is
to only clear the ZIO_REEXECUTE_SUSPEND bit and leave the
ZIO_REEXECUTE_NOW bit set.
Reviewed-by: George Melikov <mail@gmelikov.ru>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: yuxiang <guo.yong33@zte.com.cn>
Diffstat (limited to 'include')
0 files changed, 0 insertions, 0 deletions