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Fri, 09 Oct 2020 19:54:03 +0000 Received: from mga12.intel.com (unknown [192.55.52.136]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id f6f54446-46d1-4920-a493-c209ac9ecba7; Fri, 09 Oct 2020 19:54:02 +0000 (UTC) Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:54:01 -0700 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 X-Outflank-Mailman: Message body and most headers restored to incoming version X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: f6f54446-46d1-4920-a493-c209ac9ecba7 IronPort-SDR: s702jsQClR22uyUIa1DJCn3AxvMbIytbcDnPsENmUbh0L/kV/PkPNi2T5tmbu+/56fcl6uR0LT +MZiIYckw7Rw== X-IronPort-AV: E=McAfee;i="6000,8403,9769"; a="144851103" X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="144851103" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False IronPort-SDR: vscQ8/PPGEHFzlszF4epup1/yO0Zdiea6PUky2hcTMxo6TNU67DufPr1A76ntRogBKZEHAEf8L bsjRzl3g/9bQ== X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="529054196" From: ira.weiny@intel.com To: Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski , Peter Zijlstra Cc: Ira Weiny , Kirti Wankhede , 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 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 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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 -=3D MBOCHS_MMIO_BAR_OFFSET; poff =3D pos & ~PAGE_MASK; pg =3D __mbochs_get_page(mdev_state, pos >> PAGE_SHIFT); - map =3D kmap(pg); + map =3D 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); =20 } else { --=20 2.28.0.rc0.12.gb6a658bd00c9