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@xxxxxxxxx> > 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@xxxxxxxxx> > 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. 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 -- To unsubscribe from this list: send the line "unsubscribe kernel-testers" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
