tree e9e3d5b75c4b1bdd83eaf7727016f607310c6574
parent 43aeaa29573924df76f44eda2bbd94ca36e407b5
author Mikulas Patocka <mpatocka@redhat.com> 1373496078 +0100
committer Alasdair G Kergon <agk@redhat.com> 1373496078 +0100

dm bufio: submit writes outside lock

This patch changes dm-bufio so that it submits write I/Os outside of the
lock. If the number of submitted buffers is greater than the number of
requests on the target queue, submit_bio blocks. We want to block outside
of the lock to improve latency of other threads that may need the lock.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>