I just installed Natty and brought it up-to-date as of about 4/8; this is using kernel 2.6.38-8-generic.
Two identical 2TB 4K-sector disks show about a 2x slowdown in LUKS using XTS and 512-bit keys: doing "time find usr -ls | wc -l" reported about 37 seconds on the ext4 disk, and 1m4s on the ext4-over-LUKS disk. This isn't great, though it's certainly better than the 6x and 30x slowdowns mentioned by me above or the OP at the start. Yes, of course I started from identical contents on each disk and by dismounting and then remounting each disk. Still hoping someone can address that last factor of 2... the machine itself can run crypto -far- faster than the disks in long sequential reads or writes. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/731340 Title: LUKS is extremely slow on amd64 builds but not on i386 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
