Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756607AbaD3IzM (ORCPT ); Wed, 30 Apr 2014 04:55:12 -0400 Received: from casper.infradead.org ([85.118.1.10]:34779 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751451AbaD3IzK (ORCPT ); Wed, 30 Apr 2014 04:55:10 -0400 Date: Wed, 30 Apr 2014 10:55:08 +0200 From: Peter Zijlstra To: "Wang, Xiaoming" Cc: mingo@redhat.com, linux-kernel@vger.kernel.org, chuansheng.liu@intel.com Subject: Re: [PATCH] lib/spinlock_debug: Tweak the loop time to fit different _delay() Message-ID: <20140430085508.GE30445@twins.programming.kicks-ass.net> References: <1398897638.21870.8.camel@wxm-ubuntu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1398897638.21870.8.camel@wxm-ubuntu> User-Agent: Mutt/1.5.21 (2012-12-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Apr 30, 2014 at 06:40:38PM -0400, Wang, Xiaoming wrote: > loops_per_jiffy*Hz is not always 1 second exactly > it depends on the realization of _delay() . > delay_tsc is used as _delay() in arch/x86/lib/delay.c This just states delay() is broken. The primary response should be to try and fix that, no? -- 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/