lkml.org 
[lkml]   [2009]   [Apr]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [Bug #12809] iozone regression with 2.6.29-rc6
    On Tue, Apr 07, 2009 at 06:15:09AM +0800, Wu Fengguang wrote:
    > On Tue, Apr 07, 2009 at 03:05:38AM +0800, Rafael J. Wysocki wrote:
    > > This message has been generated automatically as a part of a report
    > > of recent regressions.
    > >
    > > The following bug entry is on the current list of known regressions
    > > from 2.6.28. Please verify if it still should be listed and let me know
    > > (either way).
    > >
    > >
    > > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12809
    > > Subject : iozone regression with 2.6.29-rc6
    > > Submitter : Lin Ming <ming.m.lin@intel.com>
    > > Date : 2009-02-27 9:13 (39 days old)
    > > First-Bad-Commit: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=1cf6e7d83bf334cc5916137862c920a97aabc018
    > > References : http://marc.info/?l=linux-kernel&m=123572630504360&w=4
    > > http://lkml.org/lkml/2009/3/14/265
    > > Handled-By : Wu Fengguang <fengguang.wu@intel.com>
    > >
    >
    > This bug could be closed.
    >
    > The performance regression is triggered by commit 1cf6e7d83bf3(mm:
    > task dirty accounting fix). Which has been reverted in 2.6.29.

    Sorry for the mistake, commit 1cf6e7d83bf3 was _not_ reverted.
    So 2.6.29 is expected to have this regression..

    Thanks,
    Fengguang

    > For 2.6.30, commit 1cf6e7d83bf33(mm: task dirty accounting fix) and
    > 1b5e62b42b55(writeback: double the dirty thresholds) were just merged
    > together. The latter one restores the iozone performance. (However
    > might deteriorate some writeback slowness bugs..)
    >
    > Thanks,
    > Fengguang
    >


    \
     
     \ /
      Last update: 2009-04-07 00:23    [W:0.023 / U:0.384 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site