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authorDan Williams <dan.j.williams@intel.com>2009-08-30 06:13:13 +0400
committerDan Williams <dan.j.williams@intel.com>2009-08-30 06:13:13 +0400
commit07a3b417dc3d00802bd7b4874c3e811f0b015a7d (patch)
treeb3b484067f700a70f3e7d575bad6e7e4ae2742cc /drivers/md/Kconfig
parentb774ef491b4edf6876077014ecbb87f10c69c10f (diff)
downloadlinux-07a3b417dc3d00802bd7b4874c3e811f0b015a7d.tar.xz
md/raid456: distribute raid processing over multiple cores
Now that the resources to handle stripe_head operations are allocated percpu it is possible for raid5d to distribute stripe handling over multiple cores. This conversion also adds a call to cond_resched() in the non-multicore case to prevent one core from getting monopolized for raid operations. Cc: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/md/Kconfig')
-rw-r--r--drivers/md/Kconfig11
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/md/Kconfig b/drivers/md/Kconfig
index abb8636bfde2..09c0c6e49ab5 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