On Tue, Apr 09, 2013 at 01:51:43PM -0400, Mikulas Patocka wrote: > The patch dm-crypt-sort-requests.patch sorts write requests submitted by a > single thread. The requests are sorted according to the sector number, > rb-tree is used for efficient sorting. Hmmm? Why not just keep the issuing order along with plugging boundaries? > So it seems that CFQ has some deficiency that it cannot merge adjacent > requests done by different processes. As I wrote before, please use bio_associate_current(). Currently, dm-crypt is completely messing up all the context information that cfq depends on to schedule IOs. Of course, it doesn't perform well. Thanks. -- tejun -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
