From patchwork Fri Oct 9 19:50:06 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ira Weiny X-Patchwork-Id: 11827715 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 302091580 for ; Fri, 9 Oct 2020 19:52:46 +0000 (UTC) Received: from ml01.01.org (ml01.01.org [198.145.21.10]) (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 E3D7922475 for ; Fri, 9 Oct 2020 19:52:45 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E3D7922475 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-nvdimm-bounces@lists.01.org Received: from ml01.vlan13.01.org (localhost [IPv6:::1]) by ml01.01.org (Postfix) with ESMTP id CE30E1594D30D; Fri, 9 Oct 2020 12:52:45 -0700 (PDT) Received-SPF: Pass (mailfrom) identity=mailfrom; client-ip=192.55.52.115; helo=mga14.intel.com; envelope-from=ira.weiny@intel.com; receiver= Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id EF4501594D309 for ; Fri, 9 Oct 2020 12:52:41 -0700 (PDT) IronPort-SDR: X3G4xl/CPQhepw8p0NrlO3TqmTjiZpcfuqXsyHGws2hVWt7ANtjTX1D3aXG27XwaKliKPOY+4u GUIHHgeoW9Aw== X-IronPort-AV: E=McAfee;i="6000,8403,9769"; a="164743947" X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="164743947" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:52:41 -0700 IronPort-SDR: L0Vefok2A93xih84zuFNBu3LKLwMRamDsDkR1F4Gust5uwQPsEktlHxFcxfQt1U0vxS4VptD4d rIp50GoBaQKg== X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="345148048" Received: from iweiny-desk2.sc.intel.com (HELO localhost) ([10.3.52.147]) by orsmga008-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:52:40 -0700 From: ira.weiny@intel.com To: Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski , Peter Zijlstra Subject: [PATCH RFC PKS/PMEM 31/58] fs/vboxsf: Utilize new kmap_thread() Date: Fri, 9 Oct 2020 12:50:06 -0700 Message-Id: <20201009195033.3208459-32-ira.weiny@intel.com> X-Mailer: git-send-email 2.28.0.rc0.12.gb6a658bd00c9 In-Reply-To: <20201009195033.3208459-1-ira.weiny@intel.com> References: <20201009195033.3208459-1-ira.weiny@intel.com> MIME-Version: 1.0 Message-ID-Hash: 7EK2MBYVYI5AJNGYFWBRRW43DSW7LZOC X-Message-ID-Hash: 7EK2MBYVYI5AJNGYFWBRRW43DSW7LZOC X-MailFrom: ira.weiny@intel.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; suspicious-header CC: Hans de Goede , x86@kernel.org, Dave Hansen , Fenghua Yu , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, kexec@lists.infradead.org, linux-bcache@vger.kernel.org, linux-mtd@lists.infradead.org, devel@driverdev.osuosl.org, linux-efi@vger.kernel.org, linux-mmc@vger.kernel.org, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, linux-nfs@vger.kernel.org, ceph-devel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-aio@kvack.org, io-uring@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-um@lists.infradead.org, linux-ntfs-dev@lists.sourceforge.net, reiserfs-devel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-nilfs@vger.kernel.org, cluster-devel@redhat.com, ecryptfs@vger.k ernel.org, linux-cifs@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-afs@lists.infradead.org, linux-rdma@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, drbd-dev@lists.linbit.com, linux-block@vger.kernel.org, xen-devel@lists.xenproject.org, linux-cachefs@redhat.com, samba-technical@lists.samba.org, intel-wired-lan@lists.osuosl.org X-Mailman-Version: 3.1.1 Precedence: list List-Id: "Linux-nvdimm developer list." Archived-At: List-Archive: List-Help: List-Post: List-Subscribe: List-Unsubscribe: From: Ira Weiny The kmap() calls in this FS are localized to a single thread. To avoid the over head of global PKRS updates use the new kmap_thread() call. Cc: Hans de Goede Signed-off-by: Ira Weiny --- fs/vboxsf/file.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/fs/vboxsf/file.c b/fs/vboxsf/file.c index c4ab5996d97a..d9c7e6b7b4cc 100644 --- a/fs/vboxsf/file.c +++ b/fs/vboxsf/file.c @@ -216,7 +216,7 @@ static int vboxsf_readpage(struct file *file, struct page *page) u8 *buf; int err; - buf = kmap(page); + buf = kmap_thread(page); err = vboxsf_read(sf_handle->root, sf_handle->handle, off, &nread, buf); if (err == 0) { @@ -227,7 +227,7 @@ static int vboxsf_readpage(struct file *file, struct page *page) SetPageError(page); } - kunmap(page); + kunmap_thread(page); unlock_page(page); return err; } @@ -268,10 +268,10 @@ static int vboxsf_writepage(struct page *page, struct writeback_control *wbc) if (!sf_handle) return -EBADF; - buf = kmap(page); + buf = kmap_thread(page); err = vboxsf_write(sf_handle->root, sf_handle->handle, off, &nwrite, buf); - kunmap(page); + kunmap_thread(page); kref_put(&sf_handle->refcount, vboxsf_handle_release); @@ -302,10 +302,10 @@ static int vboxsf_write_end(struct file *file, struct address_space *mapping, if (!PageUptodate(page) && copied < len) zero_user(page, from + copied, len - copied); - buf = kmap(page); + buf = kmap_thread(page); err = vboxsf_write(sf_handle->root, sf_handle->handle, pos, &nwritten, buf + from); - kunmap(page); + kunmap_thread(page); if (err) { nwritten = 0;