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Date: Thu, 16 Sep 2010 00:45:09 -0400 From: John Drescher <drescherjm@...il.com> To: LKML <linux-kernel@...r.kernel.org> Subject: Fwd: [PATCH RFC] x86: hpet: Avoid the readback penalty On Wed, Sep 15, 2010 at 9:54 AM, John Drescher <drescherjm@...il.com> wrote: > On Wed, Sep 15, 2010 at 9:11 AM, Thomas Gleixner <tglx@...utronix.de> wrote: >> On Tue, 14 Sep 2010, tip-bot for Thomas Gleixner wrote: >>> x86: hpet: Work around hardware stupidity >> >> After my brain recovered from yesterdays exposure with the x86 timer >> horror, I came up with a different solution for this problem, which >> avoids the readback of the compare register completely. It works >> nicely on my affected ATI system, but needs some exposure to the other >> machines. >> >> Comments ? >> > > I can test this on my i7 machine in tonight (around 12 hours from now). Seems to work fine on my i7 box. I applied the first patch to 2.6.36-rc4-git2 then after that I applied the new patch from this email. Both patches applied cleanly and I am now running the patched kernel without any issue. I turned off the clocksource=acpi_pm workaround I had enabled from the original problem. jmd1 ~ # uname -a Linux jmd1 2.6.36-rc4-git2-no-penalty #3 SMP PREEMPT Wed Sep 15 21:25:53 EDT 2010 x86_64 Intel(R) Core(TM) i7 CPU 920 @ 2.67GHz GenuineIntel GNU/Linux John -- John M. Drescher -- 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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