Hi Milan, On Mon, Jun 02, 2008 at 08:52:00AM +0200, Milan Broz wrote: > Please could you try if patch here helps and doesn't cause performance degradation? > http://www2.kernel.org/pub/linux/kernel/people/agk/patches/2.6/2.6.25/dm-crypt-add-cond_resched.patch Will the result of testing a Debian 2.6.24-etchnhalf.1-amd64 kernel (very near a vanilla kernel) be of same value? Since the data on some other drives on this server is important so I dare not try 2.6.25-rc on it. Following is my test plan, comments are welcomed: Test command: # dd if=/dev/zero of=/dev/mapper/open_device bs=500M count=10 (this server has 2G memory) The command will be run for 3 times, and average speed of last two runs will be taken as result score. Dm-crypt LUKS Encryption scenarios: aes-cbc-essiv:sha256, keysize 128 aes-xts-plain, keysize 256 aes-xts-plain, keysize 512 I will compare the speed of all above 3 encryption scenarios, with and without the patch. -- Li, Yan -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
