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| author | Philipp Reisner <philipp.reisner@linbit.com> | 2010-08-31 12:00:50 +0200 |
|---|---|---|
| committer | Philipp Reisner <philipp.reisner@linbit.com> | 2010-10-14 18:38:26 +0200 |
| commit | 0778286a133d2d3f81861a4e5db308e359583006 (patch) | |
| tree | 14bdfe375481d8954ada1ddaa0bc84fcaba4e23d /drivers/block/drbd/drbd_req.c | |
| parent | d53733893dc43f4ebb5be510863c5debf0f8990b (diff) | |
| download | blackbird-op-linux-0778286a133d2d3f81861a4e5db308e359583006.tar.gz blackbird-op-linux-0778286a133d2d3f81861a4e5db308e359583006.zip | |
drbd: Disable activity log updates when the whole device is out of sync
When the complete device is marked as out of sync, we can disable
updates of the on disk AL. Currently AL updates are only disabled
if one uses the "invalidate-remote" command on an unconnected,
primary device, or when at attach time all bits in the bitmap are
set.
As of now, AL updated do not get disabled when a all bits becomes
set due to application writes to an unconnected DRBD device.
While this is a missing feature, it is not considered important,
and might get added later.
BTW, after initializing a "one legged" DRBD device
drbdadm create-md resX
drbdadm -- --force primary resX
AL updates also get disabled, until the first connect.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Diffstat (limited to 'drivers/block/drbd/drbd_req.c')
| -rw-r--r-- | drivers/block/drbd/drbd_req.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/block/drbd/drbd_req.c b/drivers/block/drbd/drbd_req.c index 3b61d767d9c4..af608b39c4e0 100644 --- a/drivers/block/drbd/drbd_req.c +++ b/drivers/block/drbd/drbd_req.c @@ -94,7 +94,8 @@ static void _req_is_done(struct drbd_conf *mdev, struct drbd_request *req, const */ if (s & RQ_LOCAL_MASK) { if (get_ldev_if_state(mdev, D_FAILED)) { - drbd_al_complete_io(mdev, req->sector); + if (s & RQ_IN_ACT_LOG) + drbd_al_complete_io(mdev, req->sector); put_ldev(mdev); } else if (__ratelimit(&drbd_ratelimit_state)) { dev_warn(DEV, "Should have called drbd_al_complete_io(, %llu), " @@ -802,8 +803,10 @@ static int drbd_make_request_common(struct drbd_conf *mdev, struct bio *bio) * resync extent to finish, and, if necessary, pulls in the target * extent into the activity log, which involves further disk io because * of transactional on-disk meta data updates. */ - if (rw == WRITE && local) + if (rw == WRITE && local && !test_bit(AL_SUSPENDED, &mdev->flags)) { + req->rq_state |= RQ_IN_ACT_LOG; drbd_al_begin_io(mdev, sector); + } remote = remote && (mdev->state.pdsk == D_UP_TO_DATE || (mdev->state.pdsk == D_INCONSISTENT && |
