From patchwork Fri Oct 9 19:50:30 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ira Weiny X-Patchwork-Id: 11828027 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 1CA8D1580 for ; Fri, 9 Oct 2020 19:54:04 +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 0360622B48 for ; Fri, 9 Oct 2020 19:54:03 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0360622B48 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 E4BA3159C2229; Fri, 9 Oct 2020 12:54:03 -0700 (PDT) Received-SPF: Pass (mailfrom) identity=mailfrom; client-ip=192.55.52.93; helo=mga11.intel.com; envelope-from=ira.weiny@intel.com; receiver= Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) (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 B286E159C222A for ; Fri, 9 Oct 2020 12:54:01 -0700 (PDT) IronPort-SDR: 6kblP8MEQesOAWbqjpSlaRnJVh2H9EOhrWijg6FOCevgeHm0Cj+2nof7ViTbiDF1uYu1bjQgII SZOZKcYzDNlg== X-IronPort-AV: E=McAfee;i="6000,8403,9769"; a="162068246" X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="162068246" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:54:01 -0700 IronPort-SDR: vscQ8/PPGEHFzlszF4epup1/yO0Zdiea6PUky2hcTMxo6TNU67DufPr1A76ntRogBKZEHAEf8L bsjRzl3g/9bQ== X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="529054196" Received: from iweiny-desk2.sc.intel.com (HELO localhost) ([10.3.52.147]) by orsmga005-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:54:00 -0700 From: ira.weiny@intel.com To: Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski , Peter Zijlstra Subject: [PATCH RFC PKS/PMEM 55/58] samples: Utilize new kmap_thread() Date: Fri, 9 Oct 2020 12:50:30 -0700 Message-Id: <20201009195033.3208459-56-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: O2UR5LYIT3XLJXLGVGQYKZYIDR5HZRY4 X-Message-ID-Hash: O2UR5LYIT3XLJXLGVGQYKZYIDR5HZRY4 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: Kirti Wankhede , 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 .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 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 These kmap() calls are localized to a single thread. To avoid the over head of global PKRS updates use the new kmap_thread() call. Cc: Kirti Wankhede Signed-off-by: Ira Weiny --- samples/vfio-mdev/mbochs.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/samples/vfio-mdev/mbochs.c b/samples/vfio-mdev/mbochs.c index 3cc5e5921682..6d95422c0b46 100644 --- a/samples/vfio-mdev/mbochs.c +++ b/samples/vfio-mdev/mbochs.c @@ -479,12 +479,12 @@ static ssize_t mdev_access(struct mdev_device *mdev, char *buf, size_t count, pos -= MBOCHS_MMIO_BAR_OFFSET; poff = pos & ~PAGE_MASK; pg = __mbochs_get_page(mdev_state, pos >> PAGE_SHIFT); - map = kmap(pg); + map = kmap_thread(pg); if (is_write) memcpy(map + poff, buf, count); else memcpy(buf, map + poff, count); - kunmap(pg); + kunmap_thread(pg); put_page(pg); } else {