From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932156AbVHOMZL (ORCPT ); Mon, 15 Aug 2005 08:25:11 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751092AbVHOMZL (ORCPT ); Mon, 15 Aug 2005 08:25:11 -0400 Received: from pentafluge.infradead.org ([213.146.154.40]:6352 "EHLO pentafluge.infradead.org") by vger.kernel.org with ESMTP id S1751091AbVHOMZJ (ORCPT ); Mon, 15 Aug 2005 08:25:09 -0400 Subject: Re: [RFC] [PATCH] cache pollution aware __copy_from_user_ll() From: Arjan van de Ven To: linux@horizon.com Cc: linux-kernel@vger.kernel.org In-Reply-To: <20050815121555.29159.qmail@science.horizon.com> References: <20050815121555.29159.qmail@science.horizon.com> Content-Type: text/plain Date: Mon, 15 Aug 2005 14:25:01 +0200 Message-Id: <1124108702.3228.33.camel@laptopd505.fenrus.org> Mime-Version: 1.0 X-Mailer: Evolution 2.2.2 (2.2.2-5) Content-Transfer-Encoding: 7bit X-Spam-Score: 2.9 (++) X-Spam-Report: SpamAssassin version 3.0.4 on pentafluge.infradead.org summary: Content analysis details: (2.9 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.1 RCVD_IN_SORBS_DUL RBL: SORBS: sent directly from dynamic IP address [80.57.133.107 listed in dnsbl.sorbs.net] 2.8 RCVD_IN_DSBL RBL: Received via a relay in list.dsbl.org [] X-SRS-Rewrite: SMTP reverse-path rewritten from by pentafluge.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 2005-08-15 at 08:15 -0400, linux@horizon.com wrote: > Actually, is there any place *other* than write() to the page cache that > warrants a non-temporal store? Network sockets with scatter/gather and > hardware checksum, maybe? afaik those use zero copy already, eg straight pagecache copy. Eg that's the only case where s/g is used right now, and that case doesn't copy already.