Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760552AbXFRIgT (ORCPT ); Mon, 18 Jun 2007 04:36:19 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754263AbXFRIgM (ORCPT ); Mon, 18 Jun 2007 04:36:12 -0400 Received: from mail-gw2.sa.eol.hu ([212.108.200.109]:52192 "EHLO mail-gw2.sa.eol.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753201AbXFRIgL (ORCPT ); Mon, 18 Jun 2007 04:36:11 -0400 To: mingo@elte.hu CC: cebbert@redhat.com, chris@atlee.ca, linux-kernel@vger.kernel.org, tglx@linutronix.de, torvalds@linux-foundation.org, akpm@linux-foundation.org, kiran@scalex86.org In-reply-to: <20070618083109.GA23572@elte.hu> (message from Ingo Molnar on Mon, 18 Jun 2007 10:31:09 +0200) Subject: Re: [BUG] long freezes on thinkpad t60 References: <20070524210153.GB19672@elte.hu> <20070616103707.GA28096@elte.hu> <20070618064343.GA31113@elte.hu> <20070618081204.GA11153@elte.hu> <20070618083109.GA23572@elte.hu> Message-Id: From: Miklos Szeredi Date: Mon, 18 Jun 2007 10:34:57 +0200 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 675 Lines: 17 > > > This change causes the memory access of the "easy" spin-loop portion > > > to be more agressive: after the REP; NOP we'd not do the 'easy-loop' > > > with a simple CMPB, but we'd re-attempt the atomic op. > > > > It looks as if this is going to overflow of the lock counter, no? > > hm, what do you mean? There's no lock counter. I mean, the repeated calls to decb will pretty soon make lock->slock wrap around. Miklos - 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/