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Date: Sat, 01 Dec 2012 10:02:46 +0100
From: =?ISO-8859-1?Q?Jean-S=E9bastien_P=E9dron?= <dumbbell@FreeBSD.org>
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To: Andriy Gapon <avg@FreeBSD.org>
Subject: Re: [rfc] bind curthread to target cpu for _CST change notification
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On 30.11.2012 12:14, Andriy Gapon wrote:
> Here is my WIP:
> http://people.freebsd.org/~avg/acpi_cpu_notify.2.diff

Hi Andriy!

I tried your last patch and it fixed a page fault I had since r243404 (I
couldn't investigate the problem before this week-end).

This page fault corresponds to the point #2 of your patch ("avoid race
acpi_cpu_cx_cst and acpi_cpu_idle"). In my case, acpi_cpu_cx_cst is
triggered every 10 seconds (I don't know if it's expected). This frees
cx_ptr->p_lvlx each time (new in r243404), and concurrently,
CPU_GET_REG(cx_next->p_lvlx, 1) causes the page fault in acpi_cpu_idle().=


By the way, should _CST appear in a dump from acpidump(8)?

Thanks a lot!

--=20
Jean-S=E9bastien P=E9dron


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