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    SubjectRe: Linux 2.6.29
    On Wed, 1 Apr 2009 17:03:38 -0400 (Lennart Sorensen) wrote:

    > On Thu, Mar 26, 2009 at 06:25:19PM -0700, Andrew Morton wrote:
    > > The JBD journal is a massive designed-in contention point. It's why
    > > for several years I've been telling anyone who will listen that we need
    > > a new fs. Hopefully our response to all these problems will soon be
    > > "did you try btrfs?".
    > Oh I look forward to the day when it will be safe to convert my mythtv
    > box from ext3 to btrfs. Current kernels just have too much IO latency
    > with ext3 it seems. Older kernels were more responsive, but probably
    > had other places they were less efficient.

    Back in 2002ish I did a *lot* of work on IO latency, reads-vs-writes,
    etc, etc (but not fsync - for practical purposes it's unfixable on

    Performance was pretty good. From some of the descriptions I'm seeing
    get tossed around lately, I suspect that it has regressed.

    It would be useful/interesting if people were to rerun some of these
    tests with `echo anticipatory > /sys/block/sda/queue/scheduler'.

    Or with linux-2.5.60 :(

     \ /
      Last update: 2009-04-01 23:43    [W:0.020 / U:56.556 seconds]
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