On Mon, Feb 25, 2008 at 04:28:02PM +0100, Peter Zijlstra wrote: > On Mon, 2008-02-25 at 20:05 +0530, Dhaval Giani wrote: > Subject: sched: fully revert load_balance_monitor() > > The following commit causes a number of serious regressions: > > commit 6b2d7700266b9402e12824e11e0099ae6a4a6a79 > Author: Srivatsa Vaddagiri <[EMAIL PROTECTED]> > Date: Fri Jan 25 21:08:00 2008 +0100 > sched: group scheduler, fix fairness of cpu bandwidth allocation for task > groups > > Namely: > - very frequent wakeups on SMP, reported by PowerTop users. > - cacheline trashing on (large) SMP > - some latencies larger than 500ms > > While there is a mergeable patch to fix the latter, the former issues > are IMHO not fixable in a manner suitable for .25 (we're at -rc3 now). > Hence I propose to revert this patch and try again for .26.
I was just about to complain about the frequent wakeups caused by the original patch. It's responsible of 70% of wakeups on an otherwise idle system on s390. Thanks :) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
