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Fri, 09 Oct 2020 19:53:46 +0000 Received: from mga03.intel.com (unknown [134.134.136.65]) by us1-amaz-eas2.inumbo.com (Halon) with ESMTPS id 1ae675ba-8138-4d44-9dc2-c2b7720986d2; Fri, 09 Oct 2020 19:53:43 +0000 (UTC) Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:53:41 -0700 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 12:53:40 -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: 1ae675ba-8138-4d44-9dc2-c2b7720986d2 IronPort-SDR: NFNuK0DA20GFM7n/UmsvLHztqJht3MxNKx1+P/wchXae5yacImepU1iGMpU18ZqQI3Wjm8b9Jw njiXbjFJKd6Q== X-IronPort-AV: E=McAfee;i="6000,8403,9769"; a="165592519" X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="165592519" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False IronPort-SDR: t/zSGeR++7wfj+VtFM7nhfyp5h0blfdWqDlNHnP/5jl48Bm08GFuTiLpDu6MwkEQ7bZpMY8SQr l7ztZVCdgy3g== X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="419537249" From: ira.weiny@intel.com To: Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski , Peter Zijlstra Cc: Ira Weiny , Greg Kroah-Hartman , 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 49/58] drivers/misc: Utilize new kmap_thread() Date: Fri, 9 Oct 2020 12:50:24 -0700 Message-Id: <20201009195033.3208459-50-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: Greg Kroah-Hartman Signed-off-by: Ira Weiny --- drivers/misc/vmw_vmci/vmci_queue_pair.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/drivers/misc/vmw_vmci/vmci_queue_pair.c b/drivers/misc/vmw_vmc= i/vmci_queue_pair.c index 8531ae781195..f308abb8ad03 100644 --- a/drivers/misc/vmw_vmci/vmci_queue_pair.c +++ b/drivers/misc/vmw_vmci/vmci_queue_pair.c @@ -343,7 +343,7 @@ static int qp_memcpy_to_queue_iter(struct vmci_queue *q= ueue, size_t to_copy; =20 if (kernel_if->host) - va =3D kmap(kernel_if->u.h.page[page_index]); + va =3D kmap_thread(kernel_if->u.h.page[page_index]); else va =3D kernel_if->u.g.vas[page_index + 1]; /* Skip header. */ @@ -357,12 +357,12 @@ static int qp_memcpy_to_queue_iter(struct vmci_queue = *queue, if (!copy_from_iter_full((u8 *)va + page_offset, to_copy, from)) { if (kernel_if->host) - kunmap(kernel_if->u.h.page[page_index]); + kunmap_thread(kernel_if->u.h.page[page_index]); return VMCI_ERROR_INVALID_ARGS; } bytes_copied +=3D to_copy; if (kernel_if->host) - kunmap(kernel_if->u.h.page[page_index]); + kunmap_thread(kernel_if->u.h.page[page_index]); } =20 return VMCI_SUCCESS; @@ -391,7 +391,7 @@ static int qp_memcpy_from_queue_iter(struct iov_iter *t= o, int err; =20 if (kernel_if->host) - va =3D kmap(kernel_if->u.h.page[page_index]); + va =3D kmap_thread(kernel_if->u.h.page[page_index]); else va =3D kernel_if->u.g.vas[page_index + 1]; /* Skip header. */ @@ -405,12 +405,12 @@ static int qp_memcpy_from_queue_iter(struct iov_iter = *to, err =3D copy_to_iter((u8 *)va + page_offset, to_copy, to); if (err !=3D to_copy) { if (kernel_if->host) - kunmap(kernel_if->u.h.page[page_index]); + kunmap_thread(kernel_if->u.h.page[page_index]); return VMCI_ERROR_INVALID_ARGS; } bytes_copied +=3D to_copy; if (kernel_if->host) - kunmap(kernel_if->u.h.page[page_index]); + kunmap_thread(kernel_if->u.h.page[page_index]); } =20 return VMCI_SUCCESS; --=20 2.28.0.rc0.12.gb6a658bd00c9