Update: With a low-latency kernel (3.2.28 aka ubuntu-3.2.0-31.50) responsiveness was better, but still much worse than on my old system w/ rotational HDD. Probably the problems were related to KDE/Kubuntu, because now, out of nowhere, the system is... ...FAAAAAST! _Everything_ is smooth. I don't know why. Installed 'preload', no change. Tweaked vm.swappiness=15 & vm.vfs_cache_pressure = 50, no change. Ah, wait, maybe it was discard=16 (default=64) in fstab for the JFS filesystem. But I can't think of that beeing the root of evil. Anyway, up to now I can tell the patch seems to be ok. For the 3.5 kernel there is another call to dquot_writeback_blabla() that needs the same treatment. Other than that, git automagically merged it.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1063791 Title: ubuntu kernels < 3.7 do not include DISCARD/TRIM (FITRIM ioctl) for JFS filesystem To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1063791/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
