>-----Original Message----- >From: Mark Lord [mailto:lkml@xxxxxx] >Sent: Monday, March 31, 2008 10:43 AM >To: Rafael J. Wysocki >Cc: Pallipadi, Venkatesh; David Brownell; Andrew Morton; >linux-kernel@xxxxxxxxxxxxxxx; linux-acpi@xxxxxxxxxxxxxxx; Len Brown >Subject: Re: 2.6.25 regression: powertop says 120K wakeups/sec > >Rafael J. Wysocki wrote: >> On Friday, 28 of March 2008, Venki Pallipadi wrote: >>> On Fri, Mar 28, 2008 at 03:09:22PM -0700, David Brownell wrote: >>>> On Friday 28 March 2008, Pallipadi, Venkatesh wrote: >>>>> You should have a dmesg line which looks like >>>>> ACPI: CPU0 (power states: C1[C1] C2[C2] >>>>> Do you see C2 in such line? >>>> Yes: >>>> >>>> ACPI: CPU0 (power states: C1[C1] C2[C2]) >>> >>> David, >>> >>> I think I figured out the bug... >>> >>> Can you try the below patch and confirm that it works (over >upstream - ignore >>> the earlier revert patch I sent to you). >>> >>> Thanks, >>> Venki >>> >>> ---- >>> >>> >>> Patch to fix huge number of wakeups reported due to recent >changes in >>> processor_idle.c. The problem was that the entry_method >determination was >>> broken due to one of the recent commits (bc71bec91f987) causing >>> C1 entry to not to go to halt. This should also fix the >hang reported here. >>> http://bugzilla.kernel.org/show_bug.cgi?id=10093 >> >> Ah, thanks for figuring that out. As a regression fix, it >should go upstream >> ASAP, I think. >.. > >Would this have any applicability to 2.6.24 as well? > No. This patch is for a regression that happened post .24. pre .24 will be a different problem. Thanks, Venki -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
