From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from pizda.ninka.net (pizda.ninka.net [216.101.162.242]) by dsl2.external.hp.com (Postfix) with ESMTP id D2589483E for ; Fri, 26 Sep 2003 05:33:57 -0600 (MDT) Date: Fri, 26 Sep 2003 04:20:29 -0700 From: "David S. Miller" To: Matthew Wilcox Cc: willy@debian.org, santosh.abraham@hp.com, randolph@tausq.org, parisc-linux@lists.parisc-linux.org, sct@redhat.com Subject: Re: [parisc-linux] Fwd: Problems with raw interface. Message-Id: <20030926042029.1cdd77e9.davem@redhat.com> In-Reply-To: <20030926112400.GA24824@parcelfarce.linux.theplanet.co.uk> References: <20030925105005.GX16872@tausq.org> <000801c38356$dea5cda0$e5624c0f@india.hp.com> <20030925142623.GO13172@parcelfarce.linux.theplanet.co.uk> <20030925180848.2763911b.davem@redhat.com> <20030926112400.GA24824@parcelfarce.linux.theplanet.co.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Sender: parisc-linux-admin@lists.parisc-linux.org Errors-To: parisc-linux-admin@lists.parisc-linux.org List-Help: List-Post: List-Subscribe: , List-Id: parisc-linux developers list List-Unsubscribe: , List-Archive: On Fri, 26 Sep 2003 12:24:00 +0100 Matthew Wilcox wrote: > On Thu, Sep 25, 2003 at 06:08:48PM -0700, David S. Miller wrote: > > The flush_dcache_page() is needed in case the platform has deferred > > the flushing for a kernel cpu store to a page cache page. > > But this isn't a page cache page. Are you sure? Isn't raw I/O allowed on user buffers backed by some kind of file based mmap()?