From mboxrd@z Thu Jan 1 00:00:00 1970 From: Suresh Siddha Subject: Re: Kernel oops with 2.6.26, padlock and ipsec: probably problem with fpu state changes Date: Mon, 11 Aug 2008 15:57:09 -0700 Message-ID: <20080811225709.GO13158@linux-os.sc.intel.com> References: <200808081236.55172.wolfgang.walter@stwm.de> <20080808185356.GC607@linux-os.sc.intel.com> <489C97FB.2030408@zytor.com> <20080808231121.GA13158@linux-os.sc.intel.com> <20080809003829.GA25926@gondor.apana.org.au> <20080809142918.GA30387@gondor.apana.org.au> <20080809143259.GA30451@gondor.apana.org.au> <20080809175247.GD13158@linux-os.sc.intel.com> <20080810053048.GA3171@gondor.apana.org.au> <489E7F9C.9000708@zytor.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Herbert Xu , "Siddha, Suresh B" , Wolfgang Walter , "netdev@vger.kernel.org" , "linux-kernel@vger.kernel.org" , Ingo Molnar , "viro@ZenIV.linux.org.uk" , "vegard.nossum@gmail.com" , austin zhang To: "H. Peter Anvin" Return-path: Received: from mga14.intel.com ([143.182.124.37]:3696 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752036AbYHKW5L (ORCPT ); Mon, 11 Aug 2008 18:57:11 -0400 Content-Disposition: inline In-Reply-To: <489E7F9C.9000708@zytor.com> Sender: netdev-owner@vger.kernel.org List-ID: On Sat, Aug 09, 2008 at 10:41:48PM -0700, H. Peter Anvin wrote: > Herbert Xu wrote: > > On Sat, Aug 09, 2008 at 10:52:48AM -0700, Suresh Siddha wrote: > >>> Actually I was mistaken, Intel has done the right thing by not > >>> generating a fault on crc32c with TS set. > >> Yes, the documentation seems to says so. But I am double checking > >> with experts inside, to make sure we got the SDM right. I got confirmation that crc32 instructions don't generate DNA when cr0.TS bit is set. So no changes required for Austin's patches in this context. thanks, suresh