dm mpath: hold io until all pg_inits completed

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m->queue_io is set to block processing I/Os, and it needs to be kept
while pg-init, which issues multiple path activations, is in progress.
But m->queue is cleared when a path activation completes without error
in pg_init_done(), even while other path activations are in progress.
That may cause undesired -EIO on paths which are not complete activation.

This patch fixes that by not clearing m->queue_io until all path
activations complete.

(Before the hardware handlers were moved into the SCSI layer, pg_init
only used one path.)

Signed-off-by: Kiyoshi Ueda <k-ueda@ct.jp.nec.com>
Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>

...

This commit is contained in:

Kiyoshi Ueda 2010-03-06 02:30:02 +00:00 • committed by Alasdair G Kergon

parent fce323dd68

commit d0259bf0ee

1 changed files with 11 additions and 6 deletions

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17

drivers/md/dm-mpath.c

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