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Merge branch 'for-linus' of git://neil.brown.name/md

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* 'for-linus' of git://neil.brown.name/md:
  md/raid5: STRIPE_ACTIVE has lock semantics, add barriers
  md/raid5: abort any pending parity operations when array fails.
This commit is contained in:
Linus Torvalds 2011-11-08 18:33:53 -08:00
commit ed72a3d1b4
1 changed files with 10 additions and 6 deletions
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16
drivers/md/raid5.c
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@ -3110,7 +3110,7 @@ static void handle_stripe(struct stripe_head *sh)
struct r5dev *pdev, *qdev;
clear_bit(STRIPE_HANDLE, &sh->state);
if (test_and_set_bit(STRIPE_ACTIVE, &sh->state)) {
if (test_and_set_bit_lock(STRIPE_ACTIVE, &sh->state)) {
/* already being handled, ensure it gets handled
* again when current action finishes */
set_bit(STRIPE_HANDLE, &sh->state);
@ -3159,10 +3159,14 @@ static void handle_stripe(struct stripe_head *sh)
/* check if the array has lost more than max_degraded devices and,
* if so, some requests might need to be failed.
*/
if (s.failed > conf->max_degraded && s.to_read+s.to_write+s.written)
handle_failed_stripe(conf, sh, &s, disks, &s.return_bi);
if (s.failed > conf->max_degraded && s.syncing)
handle_failed_sync(conf, sh, &s);
if (s.failed > conf->max_degraded) {
sh->check_state = 0;
sh->reconstruct_state = 0;
if (s.to_read+s.to_write+s.written)
handle_failed_stripe(conf, sh, &s, disks, &s.return_bi);
if (s.syncing)
handle_failed_sync(conf, sh, &s);
}
/*
* might be able to return some write requests if the parity blocks
@ -3371,7 +3375,7 @@ finish:
return_io(s.return_bi);
clear_bit(STRIPE_ACTIVE, &sh->state);
clear_bit_unlock(STRIPE_ACTIVE, &sh->state);
}
static void raid5_activate_delayed(struct r5conf *conf)