Date: Sat, 01 Dec 2012 10:02:46 +0100 From: =?ISO-8859-1?Q?Jean-S=E9bastien_P=E9dron?= <dumbbell@FreeBSD.org> To: Andriy Gapon <avg@FreeBSD.org> Cc: freebsd-acpi@FreeBSD.org Subject: Re: [rfc] bind curthread to target cpu for _CST change notification Message-ID: <50B9C7B6.1040306@FreeBSD.org> In-Reply-To: <50B8951D.1000609@FreeBSD.org> References: <50AE3C66.2050207@FreeBSD.org> <1353872249.20189.3.camel@powernoodle> <50B77F4B.8070701@FreeBSD.org> <50B8951D.1000609@FreeBSD.org>
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This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enigFECCC3B61247D10FDDE0689F Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable 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 --------------enigFECCC3B61247D10FDDE0689F Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.19 (FreeBSD) Comment: Using GnuPG with undefined - http://www.enigmail.net/ iEUEARECAAYFAlC5x8AACgkQa+xGJsFYOlMw0QCUCPSRmdb7WGxW3WKjU3OhduJp CACg2sq4hCa6OKsyIE/D1+wHPvkxF80= =Sazz -----END PGP SIGNATURE----- --------------enigFECCC3B61247D10FDDE0689F--
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