lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

md/raid6: move the spare page to a percpu allocation

Browse Source 
In preparation for asynchronous handling of raid6 operations move the
spare page to a percpu allocation to allow multiple simultaneous
synchronous raid6 recovery operations.

Make this allocation cpu hotplug aware to maximize allocation
efficiency.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams
2009-07-14 11:48:22 -07:00
parent a11034b428
commit 36d1c6476b
2 changed files with 179 additions and 90 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
drivers/md/raid5.h
View File

@@ -383,8 +383,13 @@ struct raid5_private_data {
* (fresh device added).
* Cleared when a sync completes.
*/
struct page *spare_page; /* Used when checking P/Q in raid6 */
/* per cpu variables */
struct raid5_percpu {
struct page *spare_page; /* Used when checking P/Q in raid6 */
} *percpu;
#ifdef CONFIG_HOTPLUG_CPU
struct notifier_block cpu_notify;
#endif
/*
* Free stripes pool