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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 181B9C433EF for ; Tue, 16 Nov 2021 20:06:59 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id C259361BAA for ; Tue, 16 Nov 2021 20:06:58 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org C259361BAA Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linux-foundation.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvack.org Received: by kanga.kvack.org (Postfix) id 540D56B0082; Tue, 16 Nov 2021 15:05:45 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 4F0196B0083; Tue, 16 Nov 2021 15:05:45 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 3BAB76B0085; Tue, 16 Nov 2021 15:05:45 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0056.hostedemail.com [216.40.44.56]) by kanga.kvack.org (Postfix) with ESMTP id 19CD26B0082 for ; Tue, 16 Nov 2021 15:05:45 -0500 (EST) Received: from smtpin17.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id CD8271816C8A9 for ; Tue, 16 Nov 2021 20:05:34 +0000 (UTC) X-FDA: 78815873388.17.8776690 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf09.hostedemail.com (Postfix) with ESMTP id 36168300A191 for ; Tue, 16 Nov 2021 19:47:30 +0000 (UTC) Received: by mail.kernel.org (Postfix) with ESMTPSA id 0E37A619EC; Tue, 16 Nov 2021 19:47:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1637092049; bh=YDwjjZPjbBosiDIc0ptER2N/y0HLsc2nGpu++ORg6UA=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=Am+Q1+gF0bxB8faVGlGR4Lb/Ye7/0XSKjJySMbdzB5QIqA8FLjasOzOTIo2oA9I2x OTnGTyJRKwYGfXRNhdlvx0Zz+7Z+/fu+/B/qbNQky52I5XRZefBoSPwcMR28m2YhJX wBFTARDE7/C+pO0dmxyAONM0SsZ4uImRG+oNe4wc= Date: Tue, 16 Nov 2021 11:47:27 -0800 From: Andrew Morton To: "Drew DeVault" Cc: "Ammar Faizi" , , , "io_uring Mailing List" , "Jens Axboe" , "Pavel Begunkov" , Subject: Re: [PATCH] Increase default MLOCK_LIMIT to 8 MiB Message-Id: <20211116114727.601021d0763be1f1efe2a6f9@linux-foundation.org> In-Reply-To: References: <20211028080813.15966-1-sir@cmpwn.com> <593aea3b-e4a4-65ce-0eda-cb3885ff81cd@gnuweeb.org> <20211115203530.62ff33fdae14927b48ef6e5f@linux-foundation.org> X-Mailer: Sylpheed 3.5.1 (GTK+ 2.24.31; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: 36168300A191 X-Stat-Signature: wuupet316rnyyomnuimzqwue5iq5aun4 Authentication-Results: imf09.hostedemail.com; dkim=pass header.d=linux-foundation.org header.s=korg header.b=Am+Q1+gF; spf=pass (imf09.hostedemail.com: domain of akpm@linux-foundation.org designates 198.145.29.99 as permitted sender) smtp.mailfrom=akpm@linux-foundation.org; dmarc=none X-HE-Tag: 1637092050-9873 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Tue, 16 Nov 2021 07:32:33 +0100 "Drew DeVault" wrote: > > And a question: rather than messing around with a constant which will > > need to be increased again in a couple of years, can we solve this one > > and for all? For example, permit root to set the system-wide > > per-process max mlock size and depend upon initscripts to do this > > appropriately. > > Not sure I understand. Root and init scripts can already manage this > number - the goal of this patch is just to provide a saner default. Well, why change the default? Surely anyone who cares is altering it at runtime anyway. And if they are not, we should encourage them to do so?