Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751343AbdGQJ5X (ORCPT ); Mon, 17 Jul 2017 05:57:23 -0400 Received: from mx2.suse.de ([195.135.220.15]:38900 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751265AbdGQJ5S (ORCPT ); Mon, 17 Jul 2017 05:57:18 -0400 Date: Mon, 17 Jul 2017 10:57:15 +0100 From: Mel Gorman To: Ingo Molnar Cc: Andy Lutomirski , x86@kernel.org, linux-kernel@vger.kernel.org, Borislav Petkov , Linus Torvalds , Andrew Morton , "linux-mm@kvack.org" , Nadav Amit , Rik van Riel , Dave Hansen , Arjan van de Ven , Peter Zijlstra Subject: Re: [PATCH v4 00/10] PCID and improved laziness Message-ID: <20170717095715.yzmuhhp6txqsxtpf@suse.de> References: <20170705085657.eghd4xbv7g7shf5v@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-15 Content-Disposition: inline In-Reply-To: <20170705085657.eghd4xbv7g7shf5v@gmail.com> User-Agent: NeoMutt/20170421 (1.8.2) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1729 Lines: 44 On Wed, Jul 05, 2017 at 10:56:57AM +0200, Ingo Molnar wrote: > > * Andy Lutomirski wrote: > > > *** Ingo, even if this misses 4.13, please apply the first patch before > > *** the merge window. > > > Andy Lutomirski (10): > > x86/mm: Don't reenter flush_tlb_func_common() > > x86/mm: Delete a big outdated comment about TLB flushing > > x86/mm: Give each mm TLB flush generation a unique ID > > x86/mm: Track the TLB's tlb_gen and update the flushing algorithm > > x86/mm: Rework lazy TLB mode and TLB freshness tracking > > x86/mm: Stop calling leave_mm() in idle code > > x86/mm: Disable PCID on 32-bit kernels > > x86/mm: Add nopcid to turn off PCID > > x86/mm: Enable CR4.PCIDE on supported systems > > x86/mm: Try to preserve old TLB entries using PCID > > So this series is really nice, and the first two patches are already upstream, and > I've just applied all but the final patch to tip:x86/mm (out of caution - I'm a wimp). > > That should already offer some improvements and enables the CR4 bit - but doesn't > actually use the PCID hardware yet. > > I'll push it all out when it passes testing. > > If it's all super stable I plan to tempt Linus with a late merge window pull > request for all these preparatory patches. (Unless he objects that is. Hint, hint.) > > Any objections? > What was the final verdict here? I have a patch ready that should be layered on top which will need a backport. PCID support does not appear to have made it in this merge window so I'm wondering if I should send the patch as-is for placement on top of Andy's work or go with the backport and apply a follow-on patch after Andy's work gets merged. Thanks. -- Mel Gorman SUSE Labs