diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/md/Kconfig | 11 | ||||
| -rw-r--r-- | drivers/md/raid5.c | 36 |
2 files changed, 45 insertions, 2 deletions
diff --git a/drivers/md/Kconfig b/drivers/md/Kconfig index abb8636bfde..09c0c6e49ab 100644 --- a/drivers/md/Kconfig +++ b/drivers/md/Kconfig @@ -154,6 +154,17 @@ config MD_RAID456 If unsure, say Y. +config MULTICORE_RAID456 + bool "RAID-4/RAID-5/RAID-6 Multicore processing (EXPERIMENTAL)" + depends on MD_RAID456 + depends on SMP + depends on EXPERIMENTAL + ---help--- + Enable the raid456 module to dispatch per-stripe raid operations to a + thread pool. + + If unsure, say N. + config MD_RAID6_PQ tristate diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index 7c22e19aca8..364ea37706f 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -47,6 +47,7 @@ #include <linux/kthread.h> #include <linux/raid/pq.h> #include <linux/async_tx.h> +#include <linux/async.h> #include <linux/seq_file.h> #include <linux/cpu.h> #include "md.h" @@ -4314,6 +4315,36 @@ static int retry_aligned_read(raid5_conf_t *conf, struct bio *raid_bio) return handled; } +#ifdef CONFIG_MULTICORE_RAID456 +static void __process_stripe(void *param, async_cookie_t cookie) +{ + struct stripe_head *sh = param; + + handle_stripe(sh); + release_stripe(sh); +} + +static void process_stripe(struct stripe_head *sh, struct list_head *domain) +{ + async_schedule_domain(__process_stripe, sh, domain); +} + +static void synchronize_stripe_processing(struct list_head *domain) +{ + async_synchronize_full_domain(domain); +} +#else +static void process_stripe(struct stripe_head *sh, struct list_head *domain) +{ + handle_stripe(sh); + release_stripe(sh); + cond_resched(); +} + +static void synchronize_stripe_processing(struct list_head *domain) +{ +} +#endif /* @@ -4328,6 +4359,7 @@ static void raid5d(mddev_t *mddev) struct stripe_head *sh; raid5_conf_t *conf = mddev_to_conf(mddev); int handled; + LIST_HEAD(raid_domain); pr_debug("+++ raid5d active\n"); @@ -4364,8 +4396,7 @@ static void raid5d(mddev_t *mddev) spin_unlock_irq(&conf->device_lock); handled++; - handle_stripe(sh); - release_stripe(sh); + process_stripe(sh, &raid_domain); spin_lock_irq(&conf->device_lock); } @@ -4373,6 +4404,7 @@ static void raid5d(mddev_t *mddev) spin_unlock_irq(&conf->device_lock); + synchronize_stripe_processing(&raid_domain); async_tx_issue_pending_all(); unplug_slaves(mddev); |