Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753091AbYHLMCt (ORCPT ); Tue, 12 Aug 2008 08:02:49 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752175AbYHLMCj (ORCPT ); Tue, 12 Aug 2008 08:02:39 -0400 Received: from rhun.apana.org.au ([64.62.148.172]:56457 "EHLO arnor.apana.org.au" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751271AbYHLMCi (ORCPT ); Tue, 12 Aug 2008 08:02:38 -0400 Date: Tue, 12 Aug 2008 20:02:13 +0800 From: Herbert Xu To: Wolfgang Walter Cc: Suresh Siddha , "H. Peter Anvin" , "netdev@vger.kernel.org" , "linux-kernel@vger.kernel.org" , Ingo Molnar , "viro@ZenIV.linux.org.uk" , "vegard.nossum@gmail.com" Subject: Re: Kernel oops with 2.6.26, padlock and ipsec: probably problem with fpu state changes Message-ID: <20080812120213.GA22992@gondor.apana.org.au> References: <200807171653.59177.wolfgang.walter@stwm.de> <20080810030521.GA2332@gondor.apana.org.au> <20080811190131.GL13158@linux-os.sc.intel.com> <200808121343.22892.wolfgang.walter@stwm.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200808121343.22892.wolfgang.walter@stwm.de> User-Agent: Mutt/1.5.13 (2006-08-11) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1118 Lines: 30 On Tue, Aug 12, 2008 at 01:43:22PM +0200, Wolfgang Walter wrote: > > * Works fine, machine is up since 61 minutes. Thanks a lot for testing this Wolfgang! > * Performance: > > Routing performance over esp-tunnels seems unchanged here compared to 2.6.25 > (this was also the case with the "kernel_fpu_begin" patch). > > tcrypt mode=200 shows exactly the same performance penalty compared to 2.6.25 > as the "kernel_fpu_begin" patch. That's not surprising since tcrypt runs with BH off so it'll do pretty much the same thing as before. This also shows that reading CR0 doesn't impose any extra overhead compared to what was done in kernel_fpu_begin. Cheers, -- Visit Openswan at http://www.openswan.org/ Email: Herbert Xu ~{PmV>HI~} Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt -- 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/