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Date: Thu, 1 Feb 2007 20:04:31 +0100 From: Ingo Molnar <mingo@...e.hu> To: Andrew Morton <akpm@...l.org>, linux-kernel@...r.kernel.org, tglx@...utronix.de Cc: Mattia Dongili <malattia@...ux.it> Subject: Re: 2.6.20-rc6-mm3 * Mattia Dongili <malattia@...ux.it> wrote: > > Full dmesg and config: > > http://oioio.altervista.org/linux/nohz_soft-lockup.dmesg > > http://oioio.altervista.org/linux/config-2.6.20-rc6-mm3-1 > > > > As a side note the process becomes slower and slower as it proceeds, > > it's definitely noticeable during my iptables rules setup (nothing > > that complex, just default policies and subnet/lan accept rules). > > Building with NO_HZ=n right now. > > yes, slowness is gone. Any useful information I can provide? thanks for reporting this - i'll try your config. There's one fix ontop of -mm3 - see below - but i'm not sure it's related, it addresses resume problems. Ingo --- kernel/timer.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) Index: linux/kernel/timer.c =================================================================== --- linux.orig/kernel/timer.c +++ linux/kernel/timer.c @@ -1120,8 +1120,9 @@ static int timekeeping_resume(struct sys if (now && (now > timekeeping_suspend_time)) { unsigned long sleep_length = now - timekeeping_suspend_time; + xtime.tv_sec += sleep_length; - jiffies_64 += (u64)sleep_length * HZ; + wall_to_monotonic.tv_sec -= sleep_length; } /* re-base the last cycle value */ clock->cycle_last = clocksource_read(clock); @@ -1130,7 +1131,7 @@ static int timekeeping_resume(struct sys warp_check_clock_was_changed(); write_sequnlock_irqrestore(&xtime_lock, flags); - clockevents_notify(CLOCK_EVT_NOTIFY_RESUME, NULL); + touch_softlockup_watchdog(); /* Resume hrtimers */ clock_was_set(); - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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