On Saturday, December 04, 2010, Mikael Pettersson wrote: > Mikael Pettersson writes: > > Rafael J. Wysocki wrote: > > > This message has been generated automatically as a part of a summary report > > > of recent regressions. > > > > > > The following bug entry is on the current list of known regressions > > > from 2.6.36. Please verify if it still should be listed and let the tracking team > > > know (either way). > > > > > > > > > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=23902 > > > Subject : [BUG] 2.6.37-rc3 massive interactivity regression on ARM > > > Submitter : Mikael Pettersson <mikpe@xxxxxxxx> > > > Date : 2010-11-27 15:16 (6 days old) > > > Message-ID : <19697.8378.717761.236202@xxxxxxxxxxxxxxxxxxx> > > > References : http://marc.info/?l=linux-kernel&m=129087098911837&w=2 > > > > The bug is still present in 2.6.37-rc4. I'm currently trying to bisect it. > > git bisect identified > > [305e6835e05513406fa12820e40e4a8ecb63743c] sched: Do not account irq time to current task > > as the cause of this regression. Reverting it from 2.6.37-rc4 (requires some > hackery due to subsequent changes in the same area) restores sane behaviour. > > (Author of original patch cc:d.) > > The original patch submission talks about irq-heavy scenarios. My case is the > exact opposite: UP, !PREEMPT, NO_HZ, very low irq rate, essentially 100% CPU > bound in userspace but expected to schedule quickly when needed (e.g. running > top or ps or just hitting CR in one shell while another runs a compile job). Thanks, added the first bad commit information to the bug entry. Rafael -- 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
