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=-2.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS, USER_AGENT_MUTT autolearn=unavailable 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 B22EBC00319 for ; Thu, 21 Feb 2019 16:09:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 776512084D for ; Thu, 21 Feb 2019 16:09:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1550765343; bh=rl5xboU1d67euJXaVDLtlQ6tGv17029gB53Or/y7ZoA=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=LuFx3K+lUFpdI77Bn4KuxOX2yc1j+unT2BW9vg/vJvLe9H2kjIPpDgU6rydl2rUfe xrgRRT9IbQBFrMLqVhOptqbNrIiA/oed3LQNyJdLtXZA8eZW7DIH41mPjw9N9hUxTJ j6oAP/H1qUH4ozZWCgjxYFOhFOfjmJXs6/j2M8JQ= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728146AbfBUQJC (ORCPT ); Thu, 21 Feb 2019 11:09:02 -0500 Received: from mail.kernel.org ([198.145.29.99]:58412 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725880AbfBUQJB (ORCPT ); Thu, 21 Feb 2019 11:09:01 -0500 Received: from localhost (5356596B.cm-6-7b.dynamic.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id D4B972083E; Thu, 21 Feb 2019 16:09:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1550765341; bh=rl5xboU1d67euJXaVDLtlQ6tGv17029gB53Or/y7ZoA=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=KCFv6eoFlgpGZW8jrpAK8mD2ez77K9Me5rTj8pGVSYWd2WRBvmXZmvc9M657hK5/8 JMjEDXeU+68WD6lAtvQX/CQss+Rt7PB/WT9gshuomxBqXPRU24hoVESYMWYlweE4f4 G912y1kqBmE9/2glh2aVNIvxqOornbiuFl7O0IPc= Date: Thu, 21 Feb 2019 17:08:58 +0100 From: Greg Kroah-Hartman To: Andrey Ryabinin Cc: linux-kernel@vger.kernel.org, stable@vger.kernel.org, Qian Cai , Thomas Gleixner , Ingo Molnar , Borislav Petkov , "H. Peter Anvin" , Alexander Potapenko , Dmitry Vyukov , Andrew Morton , Linus Torvalds Subject: Re: [PATCH 4.19 23/30] x86_64: increase stack size for KASAN_EXTRA Message-ID: <20190221160858.GB25800@kroah.com> References: <20190221125250.543158526@linuxfoundation.org> <20190221125251.864751477@linuxfoundation.org> <953de00c-82df-3ac2-8dd7-a023c511cbb9@virtuozzo.com> <20190221152642.GA23121@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.11.3 (2019-02-01) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Feb 21, 2019 at 06:30:08PM +0300, Andrey Ryabinin wrote: > > > On 2/21/19 6:26 PM, Greg Kroah-Hartman wrote: > > On Thu, Feb 21, 2019 at 06:00:06PM +0300, Andrey Ryabinin wrote: > >> On 2/21/19 5:36 PM, Greg Kroah-Hartman wrote: > >>> 4.19-stable review patch. If anyone has any objections, please let me know. > >>> > >> > >> Drop it please. It increases kernel stack up to 4-order which is above PAGE_ALLOC_COSTLY_ORDER. > >> This changes behavior of the fork() by making it fail with -ENOMEM due of high memory fragmentation. > >> > >> The patch that removes KASAN_EXTRA (not in Linus's tree yet) would be a better fix for the problem. > > > > Ok, should this also be dropped from 4.20.y? > > > > Yes. Great, now dropped from both. thanks, greg k-h