Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030189AbVI1FBr (ORCPT ); Wed, 28 Sep 2005 01:01:47 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030190AbVI1FBr (ORCPT ); Wed, 28 Sep 2005 01:01:47 -0400 Received: from pool-151-202-105-53.ny325.east.verizon.net ([151.202.105.53]:44751 "EHLO blaze.homeip.net") by vger.kernel.org with ESMTP id S1030189AbVI1FBr (ORCPT ); Wed, 28 Sep 2005 01:01:47 -0400 Date: Wed, 28 Sep 2005 01:01:48 -0400 From: Paul Blazejowski To: Tim Schmielau Cc: LKML , Carlo Calica , xorg@lists.freedesktop.org Subject: Re: 2.6.14-rc2-mm1 Message-ID: <20050928050148.GB9960@blazebox.homeip.net> References: <20050925220037.GA8776@blazebox.homeip.net> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="Sr1nOIr3CvdE5hEN" Content-Disposition: inline In-Reply-To: X-Mailer: Mutt http://www.mutt.org X-Operating-System: Slackware 10.2.0 X-Kernel-Version: Linux blaze 2.6.13.2 i686 User-Agent: Mutt/1.5.10i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2750 Lines: 89 --Sr1nOIr3CvdE5hEN Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mon, Sep 26, 2005 at 09:14:02AM +0200, Tim Schmielau wrote: > On Sun, 25 Sep 2005, Paul Blazejowski wrote: >=20 > > Upon quick testing the latest mm kernel it appears there's some kind of > > race condition when using dual core cpu esp when using XORG and USB > > (although PS2 has same issue) kebyboard rate being too fast. >=20 > Does the following patch by John Stultz fix the problem? >=20 > Tim Tim, No it does not, from my understanding it only pertains to x86_64 but currently i run i386 SMP enabled kernel on the dualcore X2 processor. Also worth noting is that i do not see any failures or errors in dmesg related to lost timers. Perhaps this is something new? I even run a script from the bugzilla and the output matched both cpu's. Thanks, Paul >=20 >=20 > From johnstul@us.ibm.com Mon Sep 26 09:04:08 2005 > Date: Mon, 19 Sep 2005 12:16:43 -0700 > From: john stultz > To: Andrew Morton > Cc: lkml , Andi Kleen > Subject: [PATCH] x86-64: Fix bad assumption that dualcore cpus have synced > TSCs >=20 > Andrew, > This patch should resolve the issue seen in bugme bug #5105, where it > is assumed that dualcore x86_64 systems have synced TSCs. This is not > the case, and alternate timesources should be used instead. >=20 > For more details, see: > http://bugzilla.kernel.org/show_bug.cgi?id=3D5105 >=20 >=20 > Please consider for inclusion in your tree. >=20 > thanks > -john >=20 > diff --git a/arch/x86_64/kernel/time.c b/arch/x86_64/kernel/time.c > --- a/arch/x86_64/kernel/time.c > +++ b/arch/x86_64/kernel/time.c > @@ -959,9 +959,6 @@ static __init int unsynchronized_tsc(voi > are handled in the OEM check above. */ > if (boot_cpu_data.x86_vendor =3D=3D X86_VENDOR_INTEL) > return 0; > - /* All in a single socket - should be synchronized */ > - if (cpus_weight(cpu_core_map[0]) =3D=3D num_online_cpus()) > - return 0; > #endif > /* Assume multi socket systems are not synchronized */ > return num_online_cpus() > 1; >=20 >=20 >=20 --Sr1nOIr3CvdE5hEN Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (GNU/Linux) iD8DBQFDOiO8wu5Nmh3PsiMRAmqmAJ47gy0obnib4SEL6iE8uPwuSKBwfwCfbEbf yTgJZqxiIlxj1qHhcYW2LFw= =vh8R -----END PGP SIGNATURE----- --Sr1nOIr3CvdE5hEN-- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/