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| author | Lars Ellenberg <lars.ellenberg@linbit.com> | 2010-05-14 19:08:55 +0200 |
|---|---|---|
| committer | Philipp Reisner <philipp.reisner@linbit.com> | 2010-05-18 02:02:36 +0200 |
| commit | bb3d000cb99aa0924b78c1ae5f5943484527868a (patch) | |
| tree | 276a13a6f1484ae255725d0faab55ff071b68a98 | |
| parent | 45bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5 (diff) | |
| download | blackbird-op-linux-bb3d000cb99aa0924b78c1ae5f5943484527868a.tar.gz blackbird-op-linux-bb3d000cb99aa0924b78c1ae5f5943484527868a.zip | |
drbd: allow resync requests to be larger than max_segment_size
this should allow for better background resync performance.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
| -rw-r--r-- | drivers/block/drbd/drbd_worker.c | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/drivers/block/drbd/drbd_worker.c b/drivers/block/drbd/drbd_worker.c index d771b1e0424b..91085c1ab52f 100644 --- a/drivers/block/drbd/drbd_worker.c +++ b/drivers/block/drbd/drbd_worker.c @@ -462,7 +462,7 @@ int w_make_resync_request(struct drbd_conf *mdev, unsigned long bit; sector_t sector; const sector_t capacity = drbd_get_capacity(mdev->this_bdev); - int max_segment_size = queue_max_segment_size(mdev->rq_queue); + int max_segment_size; int number, i, size, pe, mx; int align, queued, sndbuf; @@ -488,6 +488,11 @@ int w_make_resync_request(struct drbd_conf *mdev, return 1; } + /* starting with drbd 8.3.8, we can handle multi-bio EEs, + * if it should be necessary */ + max_segment_size = mdev->agreed_pro_version < 94 ? + queue_max_segment_size(mdev->rq_queue) : DRBD_MAX_SEGMENT_SIZE; + mdev->c_sync_rate = calc_resync_rate(mdev); number = SLEEP_TIME * mdev->c_sync_rate / ((BM_BLOCK_SIZE / 1024) * HZ); pe = atomic_read(&mdev->rs_pending_cnt); @@ -552,12 +557,6 @@ next_sector: * * Additionally always align bigger requests, in order to * be prepared for all stripe sizes of software RAIDs. - * - * we _do_ care about the agreed-upon q->max_segment_size - * here, as splitting up the requests on the other side is more - * difficult. the consequence is, that on lvm and md and other - * "indirect" devices, this is dead code, since - * q->max_segment_size will be PAGE_SIZE. */ align = 1; for (;;) { |
