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dm raid1: use hold framework in do_failures 

Use the hold framework in do_failures.

This patch doesn't change the bio processing logic, it just simplifies
failure handling and avoids periodically polling the failures list.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Reviewed-by: Takahiro Yasui <tyasui@redhat.com>
Tested-by: Takahiro Yasui <tyasui@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
This commit is contained in:
Mikulas Patocka 2009-12-10 23:52:04 +00:00 committed by Alasdair G Kergon
parent 0478850768
commit 0f398a8403
1 changed files with 10 additions and 26 deletions
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34
drivers/md/dm-raid1.c
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@ -745,20 +745,12 @@ static void do_failures(struct mirror_set *ms, struct bio_list *failures)
{
struct bio *bio;
if (!failures->head)
if (likely(!failures->head))
return;
if (!ms->log_failure) {
while ((bio = bio_list_pop(failures))) {
ms->in_sync = 0;
dm_rh_mark_nosync(ms->rh, bio, bio->bi_size, 0);
}
return;
}
/*
* If the log has failed, unattempted writes are being
* put on the failures list. We can't issue those writes
* put on the holds list. We can't issue those writes
* until a log has been marked, so we must store them.
*
* If a 'noflush' suspend is in progress, we can requeue
@ -773,23 +765,15 @@ static void do_failures(struct mirror_set *ms, struct bio_list *failures)
* for us to treat them the same and requeue them
* as well.
*/
if (dm_noflush_suspending(ms->ti)) {
while ((bio = bio_list_pop(failures)))
bio_endio(bio, DM_ENDIO_REQUEUE);
return;
while ((bio = bio_list_pop(failures))) {
if (ms->log_failure)
hold_bio(ms, bio);
else {
ms->in_sync = 0;
dm_rh_mark_nosync(ms->rh, bio, bio->bi_size, 0);
}
if (atomic_read(&ms->suspend)) {
while ((bio = bio_list_pop(failures)))
bio_endio(bio, -EIO);
return;
}
spin_lock_irq(&ms->lock);
bio_list_merge(&ms->failures, failures);
spin_unlock_irq(&ms->lock);
delayed_wake(ms);
}
static void trigger_event(struct work_struct *work)