Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751933Ab3HKGAh (ORCPT ); Sun, 11 Aug 2013 02:00:37 -0400 Received: from moutng.kundenserver.de ([212.227.17.10]:50542 "EHLO moutng.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751396Ab3HKGAg (ORCPT ); Sun, 11 Aug 2013 02:00:36 -0400 Message-ID: <1376200711.15334.3.camel@marge.simpson.net> Subject: Re: Re-tune x86 uaccess code for PREEMPT_VOLUNTARY From: Mike Galbraith To: "H. Peter Anvin" Cc: Andi Kleen , linux-kernel@vger.kernel.org, x86@kernel.org, mingo@kernel.org, torvalds@linux-foundation.org Date: Sun, 11 Aug 2013 07:58:31 +0200 In-Reply-To: References: <1376089460-5459-1-git-send-email-andi@firstfloor.org> <5205C4BB.6020003@zytor.com> <1376114128.5332.17.camel@marge.simpson.net> <5206659F.9070705@zytor.com> <1376194657.7006.11.camel@marge.simpson.net> <520712AE.6060904@zytor.com> <1376195819.7006.18.camel@marge.simpson.net> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.2.3 Content-Transfer-Encoding: 7bit Mime-Version: 1.0 X-Provags-ID: V02:K0:pAB7wEMNqt29n89+FtPdbXQq35MQ5IVhe3giL6Wak1C rWzimPNoIsIsnuM9B7YsoYj1rdIW1yz4EvYq5H/1Uby309gK5H DL1gE7F1ALHhorryE4SbaeU5ka54NcpOv7DDM/q/wpS6xfympN Nru3aucfZgwDDrFJGukn8PmL8EQWa6Eb6oGDBfh+4BYIX/VX56 llI57vONhoAN3Z88dxyXWHy+El/e7CZhb8ul6YiSBLOp7B2y3M 0UnhF/3Bzg0cxQJX7tF54MAUnN8ohP7WdlMBZ1hPhxeoAktyk6 08gPsKNd9fa1XiSIuzECz+k5a6oiPIflWqFUWHcAsQOKh0gbPA Ic3dkW4JtN394MUuuxQiz35TaThAwnpx7u/JAoLQF+rEQWQz+0 w/EQG8ctjoydA== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 439 Lines: 13 On Sat, 2013-08-10 at 21:57 -0700, H. Peter Anvin wrote: > That sounds like an issue with specific preemption policies. Actually, voluntary/nopreempt delta for _these_ loads was nil. -Mike -- 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/