• Goldwyn Rodrigues's avatar
    md-cluster: Use a small window for resync · c40f341f
    Goldwyn Rodrigues authored
    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
    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: default avatarGoldwyn Rodrigues <rgoldwyn@suse.com>
    Signed-off-by: default avatarNeilBrown <neilb@suse.de>
raid1.h 5.33 KB