Received: by 2002:a05:6a10:9848:0:0:0:0 with SMTP id x8csp1014695pxf; Thu, 11 Mar 2021 22:58:11 -0800 (PST) X-Google-Smtp-Source: ABdhPJxMw8N0JGXDPizArOpiUJp10zkN/oKkYG4gqkzRkIYHOUigMMXddbIl2r5kXJd1jpoNZP6a X-Received: by 2002:a17:906:f953:: with SMTP id ld19mr6731839ejb.164.1615532291437; Thu, 11 Mar 2021 22:58:11 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1615532291; cv=none; d=google.com; s=arc-20160816; b=qv7C7sKSZSDb2qbfQW4WsEhpMNbEfbh4eo/82lAbLVa8QSyTMAOyPdNmrP8m1gE2FH nNrsX9GXYBtKLGw2GoIpUxY/PJrBZzbMno6C4m2orl6qe5xCZIYhlZFW3RSPFrYuctcA NghdBxXCJF641iAjW4NgM17Ebw6Rz+ui4FM0qQ1FJnjc1eHa1CxafmWJCpJTshxqgMPX NwCesG+r4ZRopgh5qnTWhl7O9cobxqr5w7B74w4JN5UDGv3H4L4Eek4Zjs0DdJMsHTp0 LZXkPY/wZip79cKheCQfKfzvhr+6N3BxI5NA/hxVFx3uA90LOP1HWwmaHNX+Amt+2q7o y9dg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:user-agent:content-disposition:mime-version :message-id:subject:cc:to:from:date; bh=myGjTtRzTOM65nEbnZiU9p9rbhD16XtIv9yfr9xvL7E=; b=oLVtczTtXsyhI2m4ANODZ9TT6oURub7pDSacIlj54kJnJlkdh9FHTqk94c1dnzU4UN amD6YwDh0zSSUijEZx7wvyj+9GuofX8ZjFEul9iWP9eidwX/3K2qaXpE2w+Cu700PvwF 1IbPWdxJJxeBa4L6B6XPI9LqyglTds7atLDnNqjtcEH3D0AWnh4C6yRrPRG9CWRwMuNv +6hGObo9dEXg7lzB2Gq31a9N46US5G3l4daoxCSCls0Ef1tAe2SDVizViie8nFS4898c rmGhdTSfgXcgtgXrEoN8YZ5tVEEr/lXCVwXIkMYHN/N10dYoBaE4MrtX4lkpshHkSZWq mD7g== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id d12si3306746edx.162.2021.03.11.22.57.48; Thu, 11 Mar 2021 22:58:11 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230136AbhCLGys (ORCPT + 99 others); Fri, 12 Mar 2021 01:54:48 -0500 Received: from verein.lst.de ([213.95.11.211]:43952 "EHLO verein.lst.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229866AbhCLGyQ (ORCPT ); Fri, 12 Mar 2021 01:54:16 -0500 Received: by verein.lst.de (Postfix, from userid 2407) id 6928C68B05; Fri, 12 Mar 2021 07:54:13 +0100 (CET) Date: Fri, 12 Mar 2021 07:54:13 +0100 From: Christoph Hellwig To: Thomas Gleixner Cc: linux-kernel@vger.kernel.org Subject: kmap_local semantics Message-ID: <20210312065413.GA29805@lst.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.17 (2007-11-01) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org So with the new kmap_local interface is it possible / advisable to use local kmaps over code that might schedule(), e.g. to wait for I/O?