diff options
Diffstat (limited to 'drivers/md/raid1.c')
| -rw-r--r-- | drivers/md/raid1.c | 41 |
1 files changed, 37 insertions, 4 deletions
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c index 33e59876678b..e2169ff6e0f0 100644 --- a/drivers/md/raid1.c +++ b/drivers/md/raid1.c @@ -90,6 +90,8 @@ static void r1bio_pool_free(void *r1_bio, void *data) #define RESYNC_PAGES ((RESYNC_BLOCK_SIZE + PAGE_SIZE-1) / PAGE_SIZE) #define RESYNC_WINDOW (RESYNC_BLOCK_SIZE * RESYNC_DEPTH) #define RESYNC_WINDOW_SECTORS (RESYNC_WINDOW >> 9) +#define CLUSTER_RESYNC_WINDOW (16 * RESYNC_WINDOW) +#define CLUSTER_RESYNC_WINDOW_SECTORS (CLUSTER_RESYNC_WINDOW >> 9) #define NEXT_NORMALIO_DISTANCE (3 * RESYNC_WINDOW_SECTORS) static void * r1buf_pool_alloc(gfp_t gfp_flags, void *data) @@ -1590,6 +1592,15 @@ static int raid1_add_disk(struct mddev *mddev, struct md_rdev *rdev) if (rdev->raid_disk >= 0) first = last = rdev->raid_disk; + /* + * find the disk ... but prefer rdev->saved_raid_disk + * if possible. + */ + if (rdev->saved_raid_disk >= 0 && + rdev->saved_raid_disk >= first && + conf->mirrors[rdev->saved_raid_disk].rdev == NULL) + first = last = rdev->saved_raid_disk; + for (mirror = first; mirror <= last; mirror++) { p = conf->mirrors+mirror; if (!p->rdev) { @@ -2495,6 +2506,11 @@ static sector_t sync_request(struct mddev *mddev, sector_t sector_nr, int *skipp bitmap_close_sync(mddev->bitmap); close_sync(conf); + + if (mddev_is_clustered(mddev)) { + conf->cluster_sync_low = 0; + conf->cluster_sync_high = 0; + } return 0; } @@ -2515,7 +2531,12 @@ static sector_t sync_request(struct mddev *mddev, sector_t sector_nr, int *skipp return sync_blocks; } - bitmap_cond_end_sync(mddev->bitmap, sector_nr); + /* we are incrementing sector_nr below. To be safe, we check against + * sector_nr + two times RESYNC_SECTORS + */ + + bitmap_cond_end_sync(mddev->bitmap, sector_nr, + mddev_is_clustered(mddev) && (sector_nr + 2 * RESYNC_SECTORS > conf->cluster_sync_high)); r1_bio = mempool_alloc(conf->r1buf_pool, GFP_NOIO); raise_barrier(conf, sector_nr); @@ -2706,6 +2727,16 @@ static sector_t sync_request(struct mddev *mddev, sector_t sector_nr, int *skipp bio_full: r1_bio->sectors = nr_sectors; + if (mddev_is_clustered(mddev) && + conf->cluster_sync_high < sector_nr + nr_sectors) { + conf->cluster_sync_low = mddev->curr_resync_completed; + conf->cluster_sync_high = conf->cluster_sync_low + CLUSTER_RESYNC_WINDOW_SECTORS; + /* Send resync message */ + md_cluster_ops->resync_info_update(mddev, + conf->cluster_sync_low, + conf->cluster_sync_high); + } + /* For a user-requested sync, we read all readable devices and do a * compare */ @@ -3020,9 +3051,11 @@ static int raid1_reshape(struct mddev *mddev) return -EINVAL; } - err = md_allow_write(mddev); - if (err) - return err; + if (!mddev_is_clustered(mddev)) { + err = md_allow_write(mddev); + if (err) + return err; + } raid_disks = mddev->raid_disks + mddev->delta_disks; |