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| author | Goldwyn Rodrigues <rgoldwyn@suse.com> | 2015-08-19 08:14:42 +1000 |
|---|---|---|
| committer | Goldwyn Rodrigues <rgoldwyn@suse.com> | 2015-10-12 01:32:05 -0500 |
| commit | c40f341f1e7fd4eddcfc5881d94cfa8669071ee6 (patch) | |
| tree | d8d572cb6b88dcd1102596d31b2bd153f79fdaab /drivers/md/raid1.h | |
| parent | 3c462c880b52aae2cfbbb8db8b401eef118cc128 (diff) | |
| download | linux-c40f341f1e7fd4eddcfc5881d94cfa8669071ee6.tar.gz linux-c40f341f1e7fd4eddcfc5881d94cfa8669071ee6.tar.bz2 linux-c40f341f1e7fd4eddcfc5881d94cfa8669071ee6.zip | |
md-cluster: Use a small window for resync
Suspending the entire device for resync could take too long. Resync
in small chunks.
cluster's resync window (32M) is maintained in r1conf as
cluster_sync_low and cluster_sync_high and processed in
raid1's sync_request(). If the current resync is outside the cluster
resync window:
1. Set the cluster_sync_low to curr_resync_completed.
2. Check if the sync will fit in the new window, if not issue a
wait_barrier() and set cluster_sync_low to sector_nr.
3. Set cluster_sync_high to cluster_sync_low + resync_window.
4. Send a message to all nodes so they may add it in their suspension
list.
bitmap_cond_end_sync is modified to allow to force a sync inorder
to get the curr_resync_completed uptodate with the sector passed.
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'drivers/md/raid1.h')
| -rw-r--r-- | drivers/md/raid1.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/md/raid1.h b/drivers/md/raid1.h index c52d7139c5d7..61c39b390cd8 100644 --- a/drivers/md/raid1.h +++ b/drivers/md/raid1.h @@ -111,6 +111,13 @@ struct r1conf { * the new thread here until we fully activate the array. */ struct md_thread *thread; + + /* Keep track of cluster resync window to send to other + * nodes. + */ + sector_t cluster_sync_low; + sector_t cluster_sync_high; + }; /* |