From patchwork Fri Oct 9 19:50:05 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ira Weiny X-Patchwork-Id: 11829009 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 863821580 for ; Fri, 9 Oct 2020 20:04:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6FB82222BA for ; Fri, 9 Oct 2020 20:04:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391028AbgJIUDk (ORCPT ); Fri, 9 Oct 2020 16:03:40 -0400 Received: from mga11.intel.com ([192.55.52.93]:40561 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390977AbgJITwj (ORCPT ); Fri, 9 Oct 2020 15:52:39 -0400 IronPort-SDR: Exjvp/k/vju92C/1HmDJJ3INkGiq2BDsyk1PJOB/fYIXN4StFZXIuvzbkTFTF8uhXPVM7irVri H8miumYbiukQ== X-IronPort-AV: E=McAfee;i="6000,8403,9769"; a="162068015" X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="162068015" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:52:38 -0700 IronPort-SDR: y48WLHg756NhaQ3a3jufh8VKJ1E37wUwe8fJ/HzDHZ6hDk/W8p1+XzOieTDyZGUDdKxAAVZp75 YdcYJzI+gesw== X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="349957490" Received: from iweiny-desk2.sc.intel.com (HELO localhost) ([10.3.52.147]) by fmsmga002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:52:36 -0700 From: ira.weiny@intel.com To: Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski , Peter Zijlstra Cc: Ira Weiny , x86@kernel.org, Dave Hansen , Dan Williams , 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.kernel.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 Subject: [PATCH RFC PKS/PMEM 30/58] fs/romfs: Utilize new kmap_thread() Date: Fri, 9 Oct 2020 12:50:05 -0700 Message-Id: <20201009195033.3208459-31-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 Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org 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. Signed-off-by: Ira Weiny --- fs/romfs/super.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/romfs/super.c b/fs/romfs/super.c index e582d001f792..9050074c6755 100644 --- a/fs/romfs/super.c +++ b/fs/romfs/super.c @@ -107,7 +107,7 @@ static int romfs_readpage(struct file *file, struct page *page) void *buf; int ret; - buf = kmap(page); + buf = kmap_thread(page); if (!buf) return -ENOMEM; @@ -136,7 +136,7 @@ static int romfs_readpage(struct file *file, struct page *page) SetPageUptodate(page); flush_dcache_page(page); - kunmap(page); + kunmap_thread(page); unlock_page(page); return ret; }