diff options
Diffstat (limited to 'drivers/md/md-cluster.c')
| -rw-r--r-- | drivers/md/md-cluster.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/md/md-cluster.c b/drivers/md/md-cluster.c index 30f1160142c1..a55b5f4d0dbe 100644 --- a/drivers/md/md-cluster.c +++ b/drivers/md/md-cluster.c @@ -85,6 +85,9 @@ struct md_cluster_info { struct completion newdisk_completion; wait_queue_head_t wait; unsigned long state; + /* record the region in RESYNCING message */ + sector_t sync_low; + sector_t sync_hi; }; enum msg_type { @@ -411,6 +414,30 @@ static void process_suspend_info(struct mddev *mddev, md_wakeup_thread(mddev->thread); return; } + + /* + * The bitmaps are not same for different nodes + * if RESYNCING is happening in one node, then + * the node which received the RESYNCING message + * probably will perform resync with the region + * [lo, hi] again, so we could reduce resync time + * a lot if we can ensure that the bitmaps among + * different nodes are match up well. + * + * sync_low/hi is used to record the region which + * arrived in the previous RESYNCING message, + * + * Call bitmap_sync_with_cluster to clear + * NEEDED_MASK and set RESYNC_MASK since + * resync thread is running in another node, + * so we don't need to do the resync again + * with the same section */ + bitmap_sync_with_cluster(mddev, cinfo->sync_low, + cinfo->sync_hi, + lo, hi); + cinfo->sync_low = lo; + cinfo->sync_hi = hi; + s = kzalloc(sizeof(struct suspend_info), GFP_KERNEL); if (!s) return; |