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Message-ID: <m28vn03uuv.fsf@firstfloor.org> Date: Mon, 28 Nov 2011 11:33:28 -0800 From: Andi Kleen <andi@...stfloor.org> To: "Nicolas Kalkhof" <nkalkhof@....de> Cc: linux-kernel@...r.kernel.org Subject: Re: Too many poll_idle cpu calls in kernel 3.2 rc-series "Nicolas Kalkhof" <nkalkhof@....de> writes: > the kernel v3.2 series shows excessive poll_idle calls during system idle phases causing the cpu > (mobile i7 2620M) to heat up and draw additional 10% more power. All kernel versions between > 3.2-rc1 and 3.2-rc3 are affected. Perf Top and Powertop both show the same issue. > I've posted a similar bug report before: http://marc.info/?l=linux-kernel&m=132164909313594&w=2 > and used perf top -U to verify the poll_idle calls as requested. So it didn't happen with earlier kernels? I would suggest a git bisect in this case. -Andi -- ak@...ux.intel.com -- Speaking for myself only -- 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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