Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755978Ab0HaWRb (ORCPT ); Tue, 31 Aug 2010 18:17:31 -0400 Received: from mail-qw0-f46.google.com ([209.85.216.46]:49167 "EHLO mail-qw0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754642Ab0HaWRa (ORCPT ); Tue, 31 Aug 2010 18:17:30 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=pTD6spLo2SE0QWQV78wvV8JRsvKOGNZc02bTDJn3j4noHzzW3y9KIEGq2gEIdNUjFI OxNds4lsfvaK+V5VRBz+WrzUB/sxFK5fT66pMv+yzxCXNuN7DTjLMPCG7lSPNd5anUn+ /eN05OM8m/biflPG9Xup0aCBSrn5dXcuO0ecw= MIME-Version: 1.0 In-Reply-To: References: <201008271537.35709.ptesarik@suse.cz> <987664A83D2D224EAE907B061CE93D53015D91D6F5@orsmsx505.amr.corp.intel.com> <987664A83D2D224EAE907B061CE93D53015D9B14DC@orsmsx505.amr.corp.intel.com> <201008302341.14312.ptesarik@suse.cz> Date: Tue, 31 Aug 2010 15:17:28 -0700 Message-ID: Subject: Re: Serious problem with ticket spinlocks on ia64 From: Tony Luck To: Petr Tesarik Cc: Hedi Berriche , "linux-ia64@vger.kernel.org" , "linux-kernel@vger.kernel.org" Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 665 Lines: 16 On Mon, Aug 30, 2010 at 3:43 PM, Tony Luck wrote: > Does Hedi's test fail for you if you drop the fancy ALAT trick? > I.e. just use "serve = *p;" in __ticket_spin_lock()? Answering my own question ... it failed in 47 minutes with the breakit script on iteration 2812 :-( So it would appear that the problem isn't related to the ALAT, or weird compiler optimizations around the inline asm. -Tony -- 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/