Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754068AbdLDOB3 (ORCPT ); Mon, 4 Dec 2017 09:01:29 -0500 Received: from mail-wm0-f65.google.com ([74.125.82.65]:38069 "EHLO mail-wm0-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751741AbdLDOB2 (ORCPT ); Mon, 4 Dec 2017 09:01:28 -0500 X-Google-Smtp-Source: AGs4zMZ3FbrU22PZnRy1YM+AVCpuUwRBzeMLcwQBNVzuYDs+q7T2aZ4bGJbXXZOT7I/uxBiYyIdW0g== From: Michal Hocko To: Cc: Mike Kravetz , Naoya Horiguchi , Andrew Morton , LKML Subject: [RFC PATCH 0/5] mm, hugetlb: allocation API and migration improvements Date: Mon, 4 Dec 2017 15:01:12 +0100 Message-Id: <20171204140117.7191-1-mhocko@kernel.org> X-Mailer: git-send-email 2.15.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1965 Lines: 41 Hi, this is a follow up for [1] for the allocation API and [2] for the hugetlb migration. It wasn't really easy to split those into two separate patch series as they share some code. My primary motivation to touch this code is to make the gigantic pages migration working. The giga pages allocation code is just too fragile and hacked into the hugetlb code now. This series tries to move giga pages closer to the first class citizen. We are not there yet but having 5 patches is quite a lot already and it will already make the code much easier to follow. I will come with other changes on top after this sees some review. The first two patches should be trivial to review. The third patch changes the way how we migrate huge pages. Newly allocated pages are a subject of the overcommit check and they participate surplus accounting which is quite unfortunate as the changelog explains. This patch doesn't change anything wrt. giga pages. Patch #4 removes the surplus accounting hack from __alloc_surplus_huge_page. I hope I didn't miss anything there and a deeper review is really due there. Patch #5 finally unifies allocation paths and giga pages shouldn't be any special anymore. There is also some renaming going on as well. Shortlog Michal Hocko (5): mm, hugetlb: unify core page allocation accounting and initialization mm, hugetlb: integrate giga hugetlb more naturally to the allocation path mm, hugetlb: do not rely on overcommit limit during migration mm, hugetlb: get rid of surplus page accounting tricks mm, hugetlb: further simplify hugetlb allocation API Diffstat: include/linux/hugetlb.h | 3 + mm/hugetlb.c | 305 +++++++++++++++++++++++++++--------------------- mm/migrate.c | 3 +- 3 files changed, 175 insertions(+), 136 deletions(-) [1] http://lkml.kernel.org/r/20170622193034.28972-1-mhocko@kernel.org [2] http://lkml.kernel.org/r/20171122152832.iayefrlxbugphorp@dhcp22.suse.cz