Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753272Ab0GFOYi (ORCPT ); Tue, 6 Jul 2010 10:24:38 -0400 Received: from nlpi157.sbcis.sbc.com ([207.115.36.171]:50972 "EHLO nlpi157.prodigy.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751126Ab0GFOYh (ORCPT ); Tue, 6 Jul 2010 10:24:37 -0400 Date: Tue, 6 Jul 2010 09:22:22 -0500 (CDT) From: Christoph Lameter X-X-Sender: cl@router.home To: Tejun Heo cc: Frederic Weisbecker , torvalds@linux-foundation.org, mingo@elte.hu, linux-kernel@vger.kernel.org, jeff@garzik.org, akpm@linux-foundation.org, rusty@rustcorp.com.au, dhowells@redhat.com, arjan@linux.intel.com, oleg@redhat.com, axboe@kernel.dk, dwalker@codeaurora.org, stefanr@s5r6.in-berlin.de, florian@mickler.org, andi@firstfloor.org, mst@redhat.com, randy.dunlap@oracle.com Subject: Re: [PATCH 12/35] workqueue: update cwq alignement In-Reply-To: <4C2A1ABF.8050504@kernel.org> Message-ID: References: <1277759063-24607-1-git-send-email-tj@kernel.org> <1277759063-24607-13-git-send-email-tj@kernel.org> <20100628224755.GA10104@nowhere> <4C29A33D.2060407@kernel.org> <20100629123632.GB5318@nowhere> <4C2A145E.8030608@kernel.org> <20100629154738.GJ5318@nowhere> <4C2A1672.20700@kernel.org> <20100629160100.GL5318@nowhere> <4C2A1ABF.8050504@kernel.org> User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 599 Lines: 14 On Tue, 29 Jun 2010, Tejun Heo wrote: > What alignment maintenance? Are you talking about the UP code? If > you're talking about the UP code, the ugliness there is because the > current UP __alloc_percpu() can't honor the alignment parameter. Why do we need alignment on UP? Cachelines typically dont bounce if a single processor accesses the data. -- 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/