Messages in this thread Patch in this message | | | From | Thomas Renninger <> | Subject | [PATCH 2/2] Re: 2.6.16-rc1-mm4 | Date | Wed, 1 Feb 2006 11:38:37 +0100 |
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On Wednesday 01 February 2006 01:59, Dave Jones wrote: > On Tue, Jan 31, 2006 at 07:19:40PM -0500, Dave Jones wrote: > > On Tue, Jan 31, 2006 at 02:45:58PM -0800, Avuton Olrich wrote: > > > On 1/29/06, Andrew Morton <akpm@osdl.org> wrote: > > > > > > > > ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.16-rc1/2.6.16-rc1-mm4/ > > > > > > I'm getting a kernel panic on my Libretto L5 on boot, I don't have a > > > serial port on this laptop, I don't have time at the moment to setup > > > netconsole, and it doesn't get the full information. Hopefully this > > > picture helps a bit: > > > > > > http://68.111.224.150:8080/P1010306.JPG > > > > > > If it doesn't help I will attempt to get a netconsole on this computer > > > on the near future. > > > > Thomas recently changed cpufreq_update_policy to call cpufreq_out_of_sync() > > to resync when the BIOS changed the frequency behind our back. > > The div by 0 trace fingers that code, but I'm puzzled what we're actually > > dividing there. > > it'd be interesting to see the output of cpufreq.debug=7 to see > what adjust_jiffies is getting before we div by 0, though I fear > it'll scroll off the screen before we get a chance to capture it. >
Test for old_freq equals 0 to insure not to divide by 0: ______________________________________________
Check for not initialized freq on cpufreq changes
signed-off-by: Thomas Renninger <trenn@suse.de>
Index: linux-2.6.16-rc1-mm3/arch/i386/kernel/timers/timer_tsc.c =================================================================== --- linux-2.6.16-rc1-mm3.orig/arch/i386/kernel/timers/timer_tsc.c +++ linux-2.6.16-rc1-mm3/arch/i386/kernel/timers/timer_tsc.c @@ -272,6 +272,10 @@ time_cpufreq_notifier(struct notifier_bl if (val != CPUFREQ_RESUMECHANGE) write_seqlock_irq(&xtime_lock); if (!ref_freq) { + if (!freq->old){ + ref_freq = freq->new; + goto end; + } ref_freq = freq->old; loops_per_jiffy_ref = cpu_data[freq->cpu].loops_per_jiffy; #ifndef CONFIG_SMP @@ -297,6 +301,7 @@ time_cpufreq_notifier(struct notifier_bl #endif } +end: if (val != CPUFREQ_RESUMECHANGE) write_sequnlock_irq(&xtime_lock); - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.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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