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authorNeilBrown <neilb@suse.de>2008-02-06 01:39:52 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-06 10:41:18 -0800
commitc620727779f7cc8ea96efb71f0651a26349e59c1 (patch)
tree777abdad9c9ef10cb4df5c0efc736e6c64851ed8 /include/linux/raid
parentmd: give userspace control over removing failed devices when external metdata in use (diff)
downloadlinux-dev-c620727779f7cc8ea96efb71f0651a26349e59c1.tar.xz
linux-dev-c620727779f7cc8ea96efb71f0651a26349e59c1.zip
md: allow a maximum extent to be set for resyncing
This allows userspace to control resync/reshape progress and synchronise it with other activities, such as shared access in a SAN, or backing up critical sections during a tricky reshape. Writing a number of sectors (which must be a multiple of the chunk size if such is meaningful) causes a resync to pause when it gets to that point. Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/raid')
-rw-r--r--include/linux/raid/md_k.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/raid/md_k.h b/include/linux/raid/md_k.h
index b579cc628303..c77dca3221ed 100644
--- a/include/linux/raid/md_k.h
+++ b/include/linux/raid/md_k.h
@@ -219,6 +219,8 @@ struct mddev_s
atomic_t recovery_active; /* blocks scheduled, but not written */
wait_queue_head_t recovery_wait;
sector_t recovery_cp;
+ sector_t resync_max; /* resync should pause
+ * when it gets here */
spinlock_t write_lock;
wait_queue_head_t sb_wait; /* for waiting on superblock updates */