Small correction: On Thu, Aug 05, 2010 at 05:35:19PM +0200, Dominik Brodowski wrote: > With this fix, I get proper speeds when doing dio reads from > /dev/mapper/vg0-*_crypt; see the 17.3 MB/s above. Most strangely, > also accesing /dev/mapper/vg0-* (un-encrypted) and the raw > device at /dev/sda* speeds up (to up to 28 MB/s). Was only seeing around > 16 to 18 MB/s without this patch for unencrypted access. The speed-up of the unencrypted access (18 -> 28 MB/s) is caused by using a different configuration for kernel 2.6.35; and seems to be unrelated to your patch. Will try to track down which config option is the culprit. kernel, dmcrypt? | good config | bad config ------------------------------------------------- patched 2.6.35, dmcrypt ~ 18 MB/s ~ 13 MB/s patched 2.6.35 ~ 28 MB/s ~ 18 MB/s ------------------------------------------------- plain 2.6.35, dmcrypt ~ 3 MB/s ~ 3 MB/s plain 2.6.35 <not tested> ~ 16 MB/s Best, Dominik -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
