On Mon, Mar 25, 2013 at 11:47:22PM -0400, Mikulas Patocka wrote: > If I sort the requests in dm-crypt to come out in the same order as they > were received, there is no longer any slowdown, the new crypt performs as > well as the old crypt, but the last time I submitted the patches, people > objected to sorting requests in dm-crypt, saying that the I/O scheduler > should sort them. But it doesn't. This problem still persists in the > current kernels. FYI, XFS also does it's own request ordering for the metadata buffers, because it knows the needed ordering and has a bigger view than than than especially CFQ. You at least have precedence in a widely used subsystem for this code. -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
