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=-3.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no 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 E7593C433E7 for ; Tue, 13 Oct 2020 11:27:02 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 74BE7214D8 for ; Tue, 13 Oct 2020 11:27:02 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="0Wkzg4Ps"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="a/Sp1GZZ" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 74BE7214D8 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References:Message-ID: Subject:To:From:Date:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=yBtrfQKW0kHyfa+ySboJ9zPd+jTrKQmDPld108iYe2M=; b=0Wkzg4PsrujF0tTp289FblMw3 GZfDbkKZDo7cKqiN1F3Cl3Y0IGHstyzli3p26bt/p4jEK/lPLW8ZAG28GStWUUYDVvZgh6HLM0pu2 /MVeX8lARDLsSayjNZxmCKtEIXMWG2ijTEFMXOMiNpJRH75hZr1kio4U3E/0q3wKOFSVwE1cgUFTh NlxZd6XqU2v8NlGBRDjFmF7ZeGDJqbk25EaqDJWY+/8i/FIgZHqnde/XN4rS67kNB0eyxHbyp+FHH dQlGh17IDe1INWVZ9nGECjYHJQ7NEzXXYHd3zU+g2KszCYxBNEI/z+Ge9EthtnfiL9nil4DlzUfcZ a1Zwy25Sg==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kSIRD-0002sg-Fl; Tue, 13 Oct 2020 11:25:51 +0000 Received: from casper.infradead.org ([2001:8b0:10b:1236::1]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kSIRB-0002sH-MA; Tue, 13 Oct 2020 11:25:49 +0000 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=ap+vugPRXoOSJhloW5EJc9FGxy9ZwiLwbnG+7+pEMhA=; b=a/Sp1GZZiVtkIrsbDZFKKgQTkQ FS+JHTt9pp+5vCrBdk0ac5b7U8ZgZGFScrKiULCJv4PZD4wWqOSzzq06ZoGh/8vFLI33VuvYYBdii wZ4VlXJvl5fnmlD+q4pIJJmvrTs/0jX/FIDmEAYUX2+Mt6vIwB3sAbRYRgWIA8hB4i4EWyZuWPFOQ rIaV+GwSaVBgBLKvO/SsFSj7I46VHFxg38PLmJQ+Oh1DkRIQcIx5NIWLGcWnDXshQ14JMdlpURiF2 LxyBxRGv+1Wkfh31jf6dzRr+U4xHgvz3PsshAxeZoaF0OQPY6Fl5VA2XZOxLonra6CTBCfgsfUBp/ 6eTYHzgA==; Received: from hch by casper.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1kSIR6-0001VK-7P; Tue, 13 Oct 2020 11:25:44 +0000 Date: Tue, 13 Oct 2020 12:25:44 +0100 From: Christoph Hellwig To: ira.weiny@intel.com Subject: Re: [PATCH RFC PKS/PMEM 24/58] fs/freevxfs: Utilize new kmap_thread() Message-ID: <20201013112544.GA5249@infradead.org> References: <20201009195033.3208459-1-ira.weiny@intel.com> <20201009195033.3208459-25-ira.weiny@intel.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20201009195033.3208459-25-ira.weiny@intel.com> X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-aio@kvack.org, linux-efi@vger.kernel.org, kvm@vger.kernel.org, linux-doc@vger.kernel.org, Peter Zijlstra , linux-mmc@vger.kernel.org, Dave Hansen , dri-devel@lists.freedesktop.org, linux-mm@kvack.org, target-devel@vger.kernel.org, linux-mtd@lists.infradead.org, linux-kselftest@vger.kernel.org, samba-technical@lists.samba.org, Thomas Gleixner , drbd-dev@lists.linbit.com, devel@driverdev.osuosl.org, cluster-devel@redhat.com, linux-nilfs@vger.kernel.org, linux-scsi@vger.kernel.org, linux-nvdimm@lists.01.org, linux-rdma@vger.kernel.org, x86@kernel.org, ceph-devel@vger.kernel.org, amd-gfx@lists.freedesktop.org, io-uring@vger.kernel.org, Christoph Hellwig , Ingo Molnar , intel-wired-lan@lists.osuosl.org, xen-devel@lists.xenproject.org, linux-ext4@vger.kernel.org, Fenghua Yu , linux-afs@lists.infradead.org, linux-cifs@vger.kernel.org, linux-um@lists.infradead.org, intel-gfx@lists.freedesktop.org, ecryptfs@vger.kernel.org, linux-erofs@lists.ozlabs.org, reiserfs-devel@vger.kernel.org, linux-block@vger.kernel.org, linux-bcache@vger.kernel.org, Borislav Petkov , Andy Lutomirski , Dan Williams , Andrew Morton , linux-cachefs@redhat.com, linux-nfs@vger.kernel.org, linux-ntfs-dev@lists.sourceforge.net, netdev@vger.kernel.org, kexec@lists.infradead.org, linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-fsdevel@vger.kernel.org, bpf@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-btrfs@vger.kernel.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-mtd" Errors-To: linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org > - kaddr = kmap(pp); > + kaddr = kmap_thread(pp); > memcpy(kaddr, vip->vii_immed.vi_immed + offset, PAGE_SIZE); > - kunmap(pp); > + kunmap_thread(pp); You only Cced me on this particular patch, which means I have absolutely no idea what kmap_thread and kunmap_thread actually do, and thus can't provide an informed review. That being said I think your life would be a lot easier if you add helpers for the above code sequence and its counterpart that copies to a potential hughmem page first, as that hides the implementation details from most users. ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/