Hello, It is advertised by a bugtracker entry [1] that kernel 2.6.30 features multi-threading for dm-crypt, the patch was posted 2009 [2] I did a fresh installation of debian 6.0.1 which contains kernel 2.6.32-5-amd64. It does not seems to do multi-threading: - The underlying raid is capable of 210 MB/s (according to hdparm and dd) - "dd if=/dev/mapper/md1_crypt of=/dev/zero bs=512k" only does 110 MB/s while the CPU is 50% idle. Also, I only see one kcryptd using CPU in top, so there is no multi-threading What is the issue with multi-threading? Did the debian team not include the patch? Or is it even rejected in the vanilla kernel? Or do I simply have to enable it by configuration? I would really love to have my new 6.0.1. machine using multiple cores. If someone managed to get this working in an official update for 6.0.1 I would consider to donate a few EURs to that person :) I don't want to wait another few years for Debian 7, my fileserver performance has already been sucky for the past five years or so. Thanks in advance! [1] https://bugs.launchpad.net/ubuntu/+source/linux/+bug/246413 [2] http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=254eff771441f4ee7aa9cf770a6e4820492c9dab
Attachment:
signature.asc
Description: This is a digitally signed message part.