Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756694AbZDXGHF (ORCPT ); Fri, 24 Apr 2009 02:07:05 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755853AbZDXGGx (ORCPT ); Fri, 24 Apr 2009 02:06:53 -0400 Received: from mga09.intel.com ([134.134.136.24]:19857 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755399AbZDXGGx (ORCPT ); Fri, 24 Apr 2009 02:06:53 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.40,240,1239001200"; d="asc'?scan'208";a="509526267" Subject: Re: Re-implement MCE log ring buffer as per-CPU ring buffer From: Huang Ying To: Robert Richter Cc: Ingo Molnar , "H. Peter Anvin" , Thomas Gleixner , Andi Kleen , "linux-kernel@vger.kernel.org" , Hidetoshi Seto In-Reply-To: <20090422101600.GL3226@erda.amd.com> References: <1240391484.6842.474.camel@yhuang-dev.sh.intel.com> <20090422092259.GC18226@elte.hu> <20090422101600.GL3226@erda.amd.com> Content-Type: multipart/signed; micalg="pgp-sha1"; protocol="application/pgp-signature"; boundary="=-SMJQwRiDDQFfEnVmveYi" Date: Fri, 24 Apr 2009 14:06:50 +0800 Message-Id: <1240553210.6842.871.camel@yhuang-dev.sh.intel.com> Mime-Version: 1.0 X-Mailer: Evolution 2.24.5 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1537 Lines: 47 --=-SMJQwRiDDQFfEnVmveYi Content-Type: text/plain Content-Transfer-Encoding: quoted-printable On Wed, 2009-04-22 at 18:16 +0800, Robert Richter wrote: > On 22.04.09 11:22:59, Ingo Molnar wrote: > >=20 > > * Huang Ying wrote: > >=20 > > > Re-implement MCE log ring buffer as per-CPU ring buffer for better=20 > > > scalability. Basic design is as follow: > >=20 > > Before changing anything substantial in the MCE code it would be=20 > > necessary to clean up and then unify the 32-bit and 64-bit side of=20 > > the MCE code first. (Which essentially means extending the=20 > > 64-bit-only code to 32-bit) >=20 > You may also want to consider to use the in-kernel ring_buffer api > (include/linux/ring_buffer.h). It seems that ring_buffer is not NMI-safe, while mcelog buffer will be used in NMI context and interrupt context. When will ring_buffer to be NMI-safe? Best Regards, Huang Ying --=-SMJQwRiDDQFfEnVmveYi Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) iEYEABECAAYFAknxVvgACgkQKhFGF+eHlpgUYACeI1mRVFfvqTvegWPiYoCpdEWR pQcAniR7oksfLBubg+bDFXEgG7/X/IUe =uvPE -----END PGP SIGNATURE----- --=-SMJQwRiDDQFfEnVmveYi-- -- 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/