From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S936903AbXG0Ocx (ORCPT ); Fri, 27 Jul 2007 10:32:53 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S933080AbXG0Ocq (ORCPT ); Fri, 27 Jul 2007 10:32:46 -0400 Received: from atlrel6.hp.com ([156.153.255.205]:50488 "EHLO atlrel6.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932291AbXG0Ocp (ORCPT ); Fri, 27 Jul 2007 10:32:45 -0400 Subject: Re: [patch][rfc] 2.6.23-rc1 mm: NUMA replicated pagecache From: Lee Schermerhorn To: Nick Piggin Cc: Linux Memory Management List , Linux Kernel Mailing List , Joachim Deguara , Eric Whitney In-Reply-To: <20070727084252.GA9347@wotan.suse.de> References: <20070727084252.GA9347@wotan.suse.de> Content-Type: text/plain Organization: HP/OSLO Date: Fri, 27 Jul 2007 10:30:47 -0400 Message-Id: <1185546647.5069.17.camel@localhost> Mime-Version: 1.0 X-Mailer: Evolution 2.6.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 2007-07-27 at 10:42 +0200, Nick Piggin wrote: > Hi, > > Just got a bit of time to take another look at the replicated pagecache > patch. The nopage vs invalidate race and clear_page_dirty_for_io fixes > gives me more confidence in the locking now; the new ->fault API makes > MAP_SHARED write faults much more efficient; and a few bugs were found > and fixed. > > More stats were added: *repl* in /proc/vmstat. Survives some kbuilding > tests... > > -- > > Page-based NUMA pagecache replication. Hi, Nick. Glad to see you're back on this. It's been on my list, but delayed by other patch streams... As I mentioned to you in prior mail, I want to try to integrate this atop my "auto/lazy migration" patches, such that when a task moves to a new node, we remove just that task's pte ref's to page cache pages [along with all refs to anon pages, as I do now] so that the task will take a fault on next touch and either use an existing local copy or replicate the page at that time. Unfortunately, that's in the queue behind the memoryless node patches and my stalled shared policy patches, among other things :-(. Also, what kernel is this patch against? Diffs just say "linux-2.6". Somewhat ambiguous... Lee