Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755460Ab0HCIcy (ORCPT ); Tue, 3 Aug 2010 04:32:54 -0400 Received: from casper.infradead.org ([85.118.1.10]:33960 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754189Ab0HCIcx convert rfc822-to-8bit (ORCPT ); Tue, 3 Aug 2010 04:32:53 -0400 Subject: Re: [PATCH RFC 10/12] x86/pvticketlock: keep count of blocked cpus From: Peter Zijlstra To: Jeremy Fitzhardinge Cc: Linux Kernel Mailing List , Nick Piggin , Jan Beulich , Avi Kivity , Xen-devel In-Reply-To: <9d5625e61c7f35e72156e8cb881e55910b4fa5dc.1279328276.git.jeremy.fitzhardinge@citrix.com> References: <9d5625e61c7f35e72156e8cb881e55910b4fa5dc.1279328276.git.jeremy.fitzhardinge@citrix.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8BIT Date: Tue, 03 Aug 2010 10:32:40 +0200 Message-ID: <1280824360.1923.421.camel@laptop> Mime-Version: 1.0 X-Mailer: Evolution 2.28.3 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 743 Lines: 18 On Fri, 2010-07-16 at 18:03 -0700, Jeremy Fitzhardinge wrote: > @@ -26,6 +26,9 @@ typedef struct arch_spinlock { > __ticket_t head, tail; > } tickets; > }; > +#ifdef CONFIG_PARAVIRT_SPINLOCKS > + __ticket_t waiting; > +#endif > } arch_spinlock_t; This bloats spinlock_t from u32 to u64 on most distro configs I think, since they'll have NR_CPUS=4096 or something large like that and probably also want to have this PARAVIRT_SPINLOCKS thing. -- 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/