Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932097AbZKXHN3 (ORCPT ); Tue, 24 Nov 2009 02:13:29 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752419AbZKXHN3 (ORCPT ); Tue, 24 Nov 2009 02:13:29 -0500 Received: from mx1.redhat.com ([209.132.183.28]:33612 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751270AbZKXHN2 (ORCPT ); Tue, 24 Nov 2009 02:13:28 -0500 Date: Tue, 24 Nov 2009 09:12:50 +0200 From: Gleb Natapov To: Christoph Lameter Cc: Peter Zijlstra , kvm@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, avi@redhat.com, mingo@elte.hu, tglx@linutronix.de, hpa@zytor.com, riel@redhat.com Subject: Re: [PATCH v2 10/12] Maintain preemptability count even for !CONFIG_PREEMPT kernels Message-ID: <20091124071250.GC2999@redhat.com> References: <1258985167-29178-1-git-send-email-gleb@redhat.com> <1258985167-29178-11-git-send-email-gleb@redhat.com> <1258990455.4531.594.camel@laptop> <20091123155851.GU2999@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 503 Lines: 14 On Mon, Nov 23, 2009 at 11:30:02AM -0600, Christoph Lameter wrote: > This adds significant overhead for the !PREEMPT case adding lots of code > in critical paths all over the place. > > I want to measure it. Can you suggest benchmarks to try? -- Gleb. -- 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/