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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 83C71C433F5 for ; Sun, 6 Mar 2022 11:33:13 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id BF5076B0071; Sun, 6 Mar 2022 06:33:12 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id BA49F6B0072; Sun, 6 Mar 2022 06:33:12 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id A92E46B0073; Sun, 6 Mar 2022 06:33:12 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0240.hostedemail.com [216.40.44.240]) by kanga.kvack.org (Postfix) with ESMTP id 9BE016B0071 for ; Sun, 6 Mar 2022 06:33:12 -0500 (EST) Received: from smtpin23.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id 4AF5D9DAE6 for ; Sun, 6 Mar 2022 11:33:12 +0000 (UTC) X-FDA: 79213750224.23.EFB71E4 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by imf19.hostedemail.com (Postfix) with ESMTP id F355A1A0009 for ; Sun, 6 Mar 2022 11:33:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=nK6fc9sC8NZv7QaEVaxxTpIxTZq/SzNUDta5FD5I7jI=; b=h03YOdnltrDeha98gsHK8dkXur 5WoXXbWj9PkQijgsFCid6H+5zSNuEWh5HeK1YhrMBrHf+71kA/oDixn2BUGWhQsYkcLEKl1EEFFAb yT27l+88Uc53FamnyVQeFQ/bdxrd4LcHjhphvkOuaSq+T2tznDtehp/m5HjPS2RFVECxEnIcR0mSb Jo/KP09BOhKIMryYd6TEejD8yn3IQ1txvcT7jyWhJqioiy2SYyfZRKLtxU4yFQvD36B10yUCdvd1L 9+3zCnbLTPK2vsrUZhhqP2vVnO/FL6CZa9CI3XROhMMLD5U1DxF3iXCMbbV4oPLok2eUuDa75j9Ip CbR6J1Iw==; Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1nQp8I-00EIzX-Hf; Sun, 06 Mar 2022 11:33:02 +0000 Date: Sun, 6 Mar 2022 11:33:02 +0000 From: Matthew Wilcox To: Jarkko Sakkinen Cc: linux-mm@kvack.org, Dave Hansen , Nathaniel McCallum , Reinette Chatre , Andrew Morton , linux-sgx@vger.kernel.org, linux-kernel@vger.kernel.org, Florian Fainelli , Thomas Bogendoerfer , Matthew Auld , Thomas =?iso-8859-1?Q?Hellstr=F6m?= , Daniel Vetter , Jason Ekstrand , Chris Wilson , Maarten Lankhorst , Greg Kroah-Hartman , Tvrtko Ursulin , Vasily Averin , Shakeel Butt , Michal Hocko , zhangyiru , Alexey Gladkov , Alexander Mikhalitsyn , linux-mips@vger.kernel.org, intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, codalist@coda.cs.cmu.edu, linux-unionfs@vger.kernel.org, linux-fsdevel@vger.kernel.org Subject: Re: [PATCH RFC 0/3] MAP_POPULATE for device memory Message-ID: References: <20220306053211.135762-1-jarkko@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220306053211.135762-1-jarkko@kernel.org> X-Rspamd-Server: rspam10 X-Rspam-User: X-Stat-Signature: czgnfwu6qr8eotkfqty1a9xsmoezubbx Authentication-Results: imf19.hostedemail.com; dkim=pass header.d=infradead.org header.s=casper.20170209 header.b=h03YOdnl; spf=none (imf19.hostedemail.com: domain of willy@infradead.org has no SPF policy when checking 90.155.50.34) smtp.mailfrom=willy@infradead.org; dmarc=none X-Rspamd-Queue-Id: F355A1A0009 X-HE-Tag: 1646566390-620936 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000041, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Sun, Mar 06, 2022 at 07:32:04AM +0200, Jarkko Sakkinen wrote: > For device memory (aka VM_IO | VM_PFNMAP) MAP_POPULATE does nothing. Allow > to use that for initializing the device memory by providing a new callback > f_ops->populate() for the purpose. As I said, NAK.