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authorNeilBrown <neilb@suse.de>2005-12-12 02:39:17 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2005-12-12 09:06:04 -0800
commit5036805be7b815eb18dcce489d974f3aee4f3841 (patch)
tree3d112acbe459fafee17f41cb634e483080b48607 /drivers/md/raid5.c
parent3795bb0fc52fe2af2749f3ad2185cb9c90871ef8 (diff)
downloadop-kernel-dev-5036805be7b815eb18dcce489d974f3aee4f3841.zip
op-kernel-dev-5036805be7b815eb18dcce489d974f3aee4f3841.tar.gz
[PATCH] md: use correct size of raid5 stripe cache when measuring how full it is
The raid5 stripe cache was recently changed from fixed size (NR_STRIPES) to variable size (conf->max_nr_stripes). However there are two places that still use the constant and as a result, reducing the size of the stripe cache can result in a deadlock. Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/md/raid5.c')
-rw-r--r--drivers/md/raid5.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 36d5f8a..fafc4bc 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -98,7 +98,7 @@ static inline void __release_stripe(raid5_conf_t *conf, struct stripe_head *sh)
list_add_tail(&sh->lru, &conf->inactive_list);
atomic_dec(&conf->active_stripes);
if (!conf->inactive_blocked ||
- atomic_read(&conf->active_stripes) < (NR_STRIPES*3/4))
+ atomic_read(&conf->active_stripes) < (conf->max_nr_stripes*3/4))
wake_up(&conf->wait_for_stripe);
}
}
@@ -264,7 +264,8 @@ static struct stripe_head *get_active_stripe(raid5_conf_t *conf, sector_t sector
conf->inactive_blocked = 1;
wait_event_lock_irq(conf->wait_for_stripe,
!list_empty(&conf->inactive_list) &&
- (atomic_read(&conf->active_stripes) < (NR_STRIPES *3/4)
+ (atomic_read(&conf->active_stripes)
+ < (conf->max_nr_stripes *3/4)
|| !conf->inactive_blocked),
conf->device_lock,
unplug_slaves(conf->mddev);
@@ -1917,7 +1918,7 @@ static int run(mddev_t *mddev)
goto abort;
}
}
-memory = conf->max_nr_stripes * (sizeof(struct stripe_head) +
+ memory = conf->max_nr_stripes * (sizeof(struct stripe_head) +
conf->raid_disks * ((sizeof(struct bio) + PAGE_SIZE))) / 1024;
if (grow_stripes(conf, conf->max_nr_stripes)) {
printk(KERN_ERR
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