diff options
| -rw-r--r-- | drivers/md/raid5.c | 34 |
1 files changed, 22 insertions, 12 deletions
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index 80ec9a6d8a18..f7fb2b87ad89 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -3738,6 +3738,7 @@ static sector_t reshape_request(mddev_t *mddev, sector_t sector_nr, int *skipped int dd_idx; sector_t writepos, safepos, gap; sector_t stripe_addr; + int reshape_sectors; if (sector_nr == 0) { /* If restarting in the middle, skip the initial sectors */ @@ -3755,6 +3756,15 @@ static sector_t reshape_request(mddev_t *mddev, sector_t sector_nr, int *skipped } } + /* We need to process a full chunk at a time. + * If old and new chunk sizes differ, we need to process the + * largest of these + */ + if (mddev->new_chunk > mddev->chunk_size) + reshape_sectors = mddev->new_chunk / 512; + else + reshape_sectors = mddev->chunk_size / 512; + /* we update the metadata when there is more than 3Meg * in the block range (that is rather arbitrary, should * probably be time based) or when the data about to be @@ -3768,12 +3778,12 @@ static sector_t reshape_request(mddev_t *mddev, sector_t sector_nr, int *skipped safepos = conf->reshape_safe; sector_div(safepos, data_disks); if (mddev->delta_disks < 0) { - writepos -= conf->chunk_size/512; - safepos += conf->chunk_size/512; + writepos -= reshape_sectors; + safepos += reshape_sectors; gap = conf->reshape_safe - conf->reshape_progress; } else { - writepos += conf->chunk_size/512; - safepos -= conf->chunk_size/512; + writepos += reshape_sectors; + safepos -= reshape_sectors; gap = conf->reshape_progress - conf->reshape_safe; } @@ -3799,14 +3809,14 @@ static sector_t reshape_request(mddev_t *mddev, sector_t sector_nr, int *skipped BUG_ON(conf->reshape_progress == 0); stripe_addr = writepos; BUG_ON((mddev->dev_sectors & - ~((sector_t)conf->chunk_size / 512 - 1)) - - (conf->chunk_size / 512) - stripe_addr + ~((sector_t)reshape_sectors - 1)) + - reshape_sectors - stripe_addr != sector_nr); } else { - BUG_ON(writepos != sector_nr + conf->chunk_size / 512); + BUG_ON(writepos != sector_nr + reshape_sectors); stripe_addr = sector_nr; } - for (i=0; i < conf->chunk_size/512; i+= STRIPE_SECTORS) { + for (i = 0; i < reshape_sectors; i += STRIPE_SECTORS) { int j; int skipped = 0; sh = get_active_stripe(conf, stripe_addr+i, 0, 0); @@ -3839,9 +3849,9 @@ static sector_t reshape_request(mddev_t *mddev, sector_t sector_nr, int *skipped } spin_lock_irq(&conf->device_lock); if (mddev->delta_disks < 0) - conf->reshape_progress -= i * new_data_disks; + conf->reshape_progress -= reshape_sectors * new_data_disks; else - conf->reshape_progress += i * new_data_disks; + conf->reshape_progress += reshape_sectors * new_data_disks; spin_unlock_irq(&conf->device_lock); /* Ok, those stripe are ready. We can start scheduling * reads on the source stripes. @@ -3867,7 +3877,7 @@ static sector_t reshape_request(mddev_t *mddev, sector_t sector_nr, int *skipped /* If this takes us to the resync_max point where we have to pause, * then we need to write out the superblock. */ - sector_nr += conf->chunk_size>>9; + sector_nr += reshape_sectors; if (sector_nr >= mddev->resync_max) { /* Cannot proceed until we've updated the superblock... */ wait_event(conf->wait_for_overlap, @@ -3883,7 +3893,7 @@ static sector_t reshape_request(mddev_t *mddev, sector_t sector_nr, int *skipped spin_unlock_irq(&conf->device_lock); wake_up(&conf->wait_for_overlap); } - return conf->chunk_size>>9; + return reshape_sectors; } /* FIXME go_faster isn't used */ |