From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 63D3CC43219 for ; Tue, 30 Apr 2019 08:19:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 37A8B21670 for ; Tue, 30 Apr 2019 08:19:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726597AbfD3IT0 (ORCPT ); Tue, 30 Apr 2019 04:19:26 -0400 Received: from mx2.suse.de ([195.135.220.15]:55528 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726202AbfD3IT0 (ORCPT ); Tue, 30 Apr 2019 04:19:26 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id B7A6FAE3F; Tue, 30 Apr 2019 08:19:24 +0000 (UTC) From: =?UTF-8?q?Michal=20Koutn=C3=BD?= To: gorcunov@gmail.com Cc: akpm@linux-foundation.org, arunks@codeaurora.org, brgl@bgdev.pl, geert+renesas@glider.be, ldufour@linux.ibm.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, mguzik@redhat.com, mhocko@kernel.org, mkoutny@suse.com, rppt@linux.ibm.com, vbabka@suse.cz, ktkhai@virtuozzo.com Subject: [PATCH 0/3] Reduce mmap_sem usage for args manipulation Date: Tue, 30 Apr 2019 10:18:41 +0200 Message-Id: <20190430081844.22597-1-mkoutny@suse.com> X-Mailer: git-send-email 2.16.4 In-Reply-To: <20190418182321.GJ3040@uranus.lan> References: <20190418182321.GJ3040@uranus.lan> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello. (apologies for late reply) I've aggregated the two previously discussed patches into one series and based on responses made some changes summed below. v2 - insert a patch refactoring validate_prctl_map - move find_vma out of the arg_lock critical section Michal Koutný (3): mm: get_cmdline use arg_lock instead of mmap_sem prctl_set_mm: Refactor checks from validate_prctl_map prctl_set_mm: downgrade mmap_sem to read lock kernel/sys.c | 55 ++++++++++++++++++++++++++++--------------------------- mm/util.c | 4 ++-- 2 files changed, 30 insertions(+), 29 deletions(-) -- 2.16.4