From patchwork Fri Oct 9 19:50:08 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ira Weiny X-Patchwork-Id: 11827735 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 956841580 for ; Fri, 9 Oct 2020 19:52:50 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 55CFF223FB for ; Fri, 9 Oct 2020 19:52:50 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 55CFF223FB Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 6697F6EDE3; Fri, 9 Oct 2020 19:52:49 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga06.intel.com (mga06.intel.com [134.134.136.31]) by gabe.freedesktop.org (Postfix) with ESMTPS id A7BF36EDE0; Fri, 9 Oct 2020 19:52:48 +0000 (UTC) IronPort-SDR: 7gU58w6IycpobbkB3swVMW13shYz4NgatlMbkfWCP4VL4tkm9VrYLwKsNBM1uE9r8oIYMYsgD4 qIgyMgNWS3LA== X-IronPort-AV: E=McAfee;i="6000,8403,9769"; a="227179069" X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="227179069" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:52:48 -0700 IronPort-SDR: 0rzHuL4N+KM4WVW+vmL+eEj1y192PC4ThPKt2jdycOAoxaq6uEUOpoOJAuFDFbsfnCMTEcEeiF lMErav9d18Iw== X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="419537108" Received: from iweiny-desk2.sc.intel.com (HELO localhost) ([10.3.52.147]) by fmsmga001-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:52:47 -0700 From: ira.weiny@intel.com To: Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski , Peter Zijlstra Date: Fri, 9 Oct 2020 12:50:08 -0700 Message-Id: <20201009195033.3208459-34-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 Subject: [Intel-gfx] [PATCH RFC PKS/PMEM 33/58] fs/cramfs: Utilize new kmap_thread() X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development 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, 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, Ira Weiny , ceph-devel@vger.kernel.org, drbd-dev@lists.linbit.com, devel@driverdev.osuosl.org, linux-cifs@vger.kernel.org, linux-nilfs@vger.kernel.org, linux-scsi@vger.kernel.org, linux-nvdimm@lists.01.org, linux-rdma@vger.kernel.org, x86@kernel.org, amd-gfx@lists.freedesktop.org, linux-afs@lists.infradead.org, cluster-devel@redhat.com, linux-cachefs@redhat.com, intel-wired-lan@lists.osuosl.org, xen-devel@lists.xenproject.org, linux-ext4@vger.kernel.org, Fenghua Yu , 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, Dan Williams , io-uring@vger.kernel.org, linux-nfs@vger.kernel.org, Nicolas Pitre , 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 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" 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: Nicolas Pitre Signed-off-by: Ira Weiny Acked-by: Nicolas Pitre --- fs/cramfs/inode.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/fs/cramfs/inode.c b/fs/cramfs/inode.c index 912308600d39..003c014a42ed 100644 --- a/fs/cramfs/inode.c +++ b/fs/cramfs/inode.c @@ -247,8 +247,8 @@ static void *cramfs_blkdev_read(struct super_block *sb, unsigned int offset, struct page *page = pages[i]; if (page) { - memcpy(data, kmap(page), PAGE_SIZE); - kunmap(page); + memcpy(data, kmap_thread(page), PAGE_SIZE); + kunmap_thread(page); put_page(page); } else memset(data, 0, PAGE_SIZE); @@ -826,7 +826,7 @@ static int cramfs_readpage(struct file *file, struct page *page) maxblock = (inode->i_size + PAGE_SIZE - 1) >> PAGE_SHIFT; bytes_filled = 0; - pgdata = kmap(page); + pgdata = kmap_thread(page); if (page->index < maxblock) { struct super_block *sb = inode->i_sb; @@ -914,13 +914,13 @@ static int cramfs_readpage(struct file *file, struct page *page) memset(pgdata + bytes_filled, 0, PAGE_SIZE - bytes_filled); flush_dcache_page(page); - kunmap(page); + kunmap_thread(page); SetPageUptodate(page); unlock_page(page); return 0; err: - kunmap(page); + kunmap_thread(page); ClearPageUptodate(page); SetPageError(page); unlock_page(page);