From owner-svn-src-all@FreeBSD.ORG Mon Apr 6 14:27:40 2015 Return-Path: Delivered-To: svn-src-all@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 8D8289A5; Mon, 6 Apr 2015 14:27:40 +0000 (UTC) Received: from bigwig.baldwin.cx (bigwig.baldwin.cx [IPv6:2001:470:1f11:75::1]) (using TLSv1 with cipher DHE-RSA-CAMELLIA256-SHA (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 61B8BF09; Mon, 6 Apr 2015 14:27:40 +0000 (UTC) Received: from ralph.baldwin.cx (pool-173-54-116-245.nwrknj.fios.verizon.net [173.54.116.245]) by bigwig.baldwin.cx (Postfix) with ESMTPSA id 17958B93C; Mon, 6 Apr 2015 10:27:39 -0400 (EDT) From: John Baldwin To: Alexey Dokuchaev Subject: Re: svn commit: r280973 - in stable: 10/sys/amd64/amd64 10/sys/dev/acpica 10/sys/i386/i386 10/sys/kern 10/sys/sys 10/sys/x86/x86 9/sys/amd64/amd64 9/sys/dev/acpica 9/sys/i386/i386 9/sys/kern 9/sys/sys ... Date: Mon, 06 Apr 2015 10:25:17 -0400 Message-ID: <1845061.qZcGbcMHKr@ralph.baldwin.cx> User-Agent: KMail/4.14.2 (FreeBSD/10.1-STABLE; KDE/4.14.2; amd64; ; ) In-Reply-To: <20150406124939.GA48665@FreeBSD.org> References: <201504020102.t3212lTO021499@svn.freebsd.org> <20150406124939.GA48665@FreeBSD.org> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.2.7 (bigwig.baldwin.cx); Mon, 06 Apr 2015 10:27:39 -0400 (EDT) Cc: svn-src-stable@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org, svn-src-stable-9@freebsd.org X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 06 Apr 2015 14:27:40 -0000 On Monday, April 06, 2015 12:49:39 PM Alexey Dokuchaev wrote: > On Thu, Apr 02, 2015 at 01:02:47AM +0000, John Baldwin wrote: > > New Revision: 280973 > > URL: https://svnweb.freebsd.org/changeset/base/280973 > > > > Log: > > MFC 276724: > > On some Intel CPUs with a P-state but not C-state invariant TSC the TSC > > may also halt in C2 and not just C3 (it seems that in some cases the BIOS > > advertises its C3 state as a C2 state in _CST). Just play it safe and > > disable both C2 and C3 states if a user forces the use of the TSC as the > > timecounter on such CPUs. > > Does it apply to stable/8 as well? Any preliminary testing I might have to > conduct first? It needs some manual patching to apply to 8 (8 doesn't have the merged tsc.c in sys/x86/x86 for example). At this point in 8's life cycle I'm not inclined to merge non-trivial changes that need manual fixups, etc. -- John Baldwin