From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf1-f193.google.com ([209.85.210.193]:38504 "EHLO mail-pf1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725962AbfGKKdD (ORCPT ); Thu, 11 Jul 2019 06:33:03 -0400 Date: Thu, 11 Jul 2019 20:30:00 +1000 From: Nicholas Piggin Subject: Re: [RFC PATCH] mm: remove quicklist page table caches References: <20190711030339.20892-1-npiggin@gmail.com> <20190711082539.GC29483@dhcp22.suse.cz> In-Reply-To: <20190711082539.GC29483@dhcp22.suse.cz> MIME-Version: 1.0 Message-Id: <1562840680.snxfuzmtxv.astroid@bobo.none> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Sender: linux-arch-owner@vger.kernel.org List-ID: To: Michal Hocko Cc: Christoph Lameter , linux-arch@vger.kernel.org, linux-ia64@vger.kernel.org, linux-mm@kvack.org, linux-sh@vger.kernel.org Michal Hocko's on July 11, 2019 6:25 pm: > On Thu 11-07-19 13:03:39, Nicholas Piggin wrote: >> Remove page table allocator "quicklists". These have been around for a >> long time, but have not got much traction in the last decade and are >> only used on ia64 and sh architectures. >>=20 >> The numbers in the initial commit look interesting but probably don't >> apply anymore. If anybody wants to resurrect this it's in the git >> history, but it's unhelpful to have this code and divergent allocator >> behaviour for minor archs. >>=20 >> Also it might be better to instead make more general improvements to >> page allocator if this is still so slow. >=20 > Agreed. And if that is not possible for whatever reason then we have a > proper justification for the revert at least. >=20 > Acked-by: Michal Hocko Thanks. If it's agreed with ia64 and sh maintainers, I can send individual patches through their trees, then the removal patch will be functionally a nop that can be easily pushed through. Thanks, Nick =