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 9DEECC433EF for ; Tue, 16 Nov 2021 20:05:28 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 3434961BBD for ; Tue, 16 Nov 2021 20:05:28 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 3434961BBD Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=cmpwn.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvack.org Received: by kanga.kvack.org (Postfix) id 912976B007E; Tue, 16 Nov 2021 15:05:17 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 8C1E26B0080; Tue, 16 Nov 2021 15:05:17 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 7887F6B0081; Tue, 16 Nov 2021 15:05:17 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0206.hostedemail.com [216.40.44.206]) by kanga.kvack.org (Postfix) with ESMTP id 65C3F6B007E for ; Tue, 16 Nov 2021 15:05:17 -0500 (EST) Received: from forelay.prod.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by fograve04.hostedemail.com (Postfix) with ESMTP id 4FFCC7F8EB for ; Tue, 16 Nov 2021 19:48:00 +0000 (UTC) Received: from smtpin25.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 1C6F2181D8626 for ; Tue, 16 Nov 2021 19:47:50 +0000 (UTC) X-FDA: 78815828700.25.1FD4D54 Received: from out0.migadu.com (out0.migadu.com [94.23.1.103]) by imf06.hostedemail.com (Postfix) with ESMTP id 1389C801E30B for ; Tue, 16 Nov 2021 19:25:36 +0000 (UTC) MIME-Version: 1.0 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cmpwn.com; s=key1; t=1637090734; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=NH4D06+wvki1Y2o8G9uIKdZSfom0w6wnccvPwaGoNTQ=; b=tC1QclNLGPZYG5G+lNBUu61UJQoA9aD6mERtdhl9mxWXld6jHcG39WfFWPkGgYDgX9hYva JBRnijENUJGIvCEjF0s3QXXdwgG8+cPey/+vjUSO+xevG07WiuwOwkHMiWmQxslOweAY9+ YKIgiIwhCh1/YmseHtmKc/sxvw6Pyw+liAK7Mmjhj1M2V04m4wMfm6qQ4UzAMT5qU6fYc+ dhyqsi7KqM+xDTLD55r2/gEymAt1xTQb2DUPYuuU8QfSxkwA3JVi1tyvD6e95Xys2ZAU84 44YhrkldU32fCmxtoRnPAV+hFr0lsyxdCnWK+XwfvrnV4XfUX4lLE5V1q4bw3Q== Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=UTF-8 Date: Tue, 16 Nov 2021 20:25:33 +0100 Message-Id: Subject: Re: [PATCH] Increase default MLOCK_LIMIT to 8 MiB X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. From: "Drew DeVault" To: "Vito Caputo" , "Jens Axboe" Cc: "Matthew Wilcox" , "Andrew Morton" , "Ammar Faizi" , , , "io_uring Mailing List" , "Pavel Begunkov" , References: <20211028080813.15966-1-sir@cmpwn.com> <593aea3b-e4a4-65ce-0eda-cb3885ff81cd@gnuweeb.org> <20211115203530.62ff33fdae14927b48ef6e5f@linux-foundation.org> <20211116192148.vjdlng7pesbgjs6b@shells.gnugeneration.com> In-Reply-To: <20211116192148.vjdlng7pesbgjs6b@shells.gnugeneration.com> X-Migadu-Flow: FLOW_OUT X-Migadu-Auth-User: sir@cmpwn.com X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: 1389C801E30B X-Stat-Signature: who1nctw6ahdiq5hci4eqxqx4tyat88i Authentication-Results: imf06.hostedemail.com; dkim=pass header.d=cmpwn.com header.s=key1 header.b=tC1QclNL; dmarc=pass (policy=none) header.from=cmpwn.com; spf=pass (imf06.hostedemail.com: domain of sir@cmpwn.com designates 94.23.1.103 as permitted sender) smtp.mailfrom=sir@cmpwn.com X-HE-Tag: 1637090736-489974 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 Nov 16, 2021 at 8:21 PM CET, Vito Caputo wrote: > Considering a single fullscreen 32bpp 4K-resolution framebuffer is > ~32MiB, I'm not convinced this is really correct in nearly 2022. Can you name a practical use-case where you'll be doing I/O with uncompressed 4K framebuffers? The kind of I/O which is supported by io_uring, to be specific, not, say, handing it off to libdrm.