From patchwork Fri Oct 9 19:50:16 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ira Weiny X-Patchwork-Id: 11827847 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 B04CA14D5 for ; Fri, 9 Oct 2020 19:53:19 +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 622F02240A for ; Fri, 9 Oct 2020 19:53:19 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 622F02240A 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 416DB159C2201; Fri, 9 Oct 2020 12:53:19 -0700 (PDT) Received-SPF: Pass (mailfrom) identity=mailfrom; client-ip=134.134.136.100; helo=mga07.intel.com; envelope-from=ira.weiny@intel.com; receiver= Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) (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 A60E4159C2202 for ; Fri, 9 Oct 2020 12:53:16 -0700 (PDT) IronPort-SDR: 4M9QMTsH9wJJvZ4D+P9iIShJg+FNAVRbt0VZSQrSs2o3q5uVLF/Uux/AK2Kjr6coeogMehU5L0 wSRVLH3+20kQ== X-IronPort-AV: E=McAfee;i="6000,8403,9769"; a="229715312" X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="229715312" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:53:16 -0700 IronPort-SDR: tpdf2AjeaRc5H+9J2CTgDjuzQWeL2r1NHpqYA6zEYh1sueM+cncDhIB0ZXYbhrsfqtXGL/LVMU w/znFNAZKmjw== X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="518801571" Received: from iweiny-desk2.sc.intel.com (HELO localhost) ([10.3.52.147]) by fmsmga006-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:53:15 -0700 From: ira.weiny@intel.com To: Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski , Peter Zijlstra Subject: [PATCH RFC PKS/PMEM 41/58] drivers/target: Utilize new kmap_thread() Date: Fri, 9 Oct 2020 12:50:16 -0700 Message-Id: <20201009195033.3208459-42-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: 6IBFX6JFK7HWHV6OT6Q2PN3JTPVEX62Q X-Message-ID-Hash: 6IBFX6JFK7HWHV6OT6Q2PN3JTPVEX62Q 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: 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 in this driver 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 --- drivers/target/target_core_iblock.c | 4 ++-- drivers/target/target_core_rd.c | 4 ++-- drivers/target/target_core_transport.c | 4 ++-- 3 files changed, 6 insertions(+), 6 deletions(-) diff --git a/drivers/target/target_core_iblock.c b/drivers/target/target_core_iblock.c index 1c181d31f4c8..df7b1568edb3 100644 --- a/drivers/target/target_core_iblock.c +++ b/drivers/target/target_core_iblock.c @@ -415,7 +415,7 @@ iblock_execute_zero_out(struct block_device *bdev, struct se_cmd *cmd) unsigned char *buf, *not_zero; int ret; - buf = kmap(sg_page(sg)) + sg->offset; + buf = kmap_thread(sg_page(sg)) + sg->offset; if (!buf) return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; /* @@ -423,7 +423,7 @@ iblock_execute_zero_out(struct block_device *bdev, struct se_cmd *cmd) * incoming WRITE_SAME payload does not contain zeros. */ not_zero = memchr_inv(buf, 0x00, cmd->data_length); - kunmap(sg_page(sg)); + kunmap_thread(sg_page(sg)); if (not_zero) return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; diff --git a/drivers/target/target_core_rd.c b/drivers/target/target_core_rd.c index 408bd975170b..dbbdd39c5bf9 100644 --- a/drivers/target/target_core_rd.c +++ b/drivers/target/target_core_rd.c @@ -159,9 +159,9 @@ static int rd_allocate_sgl_table(struct rd_dev *rd_dev, struct rd_dev_sg_table * sg_assign_page(&sg[j], pg); sg[j].length = PAGE_SIZE; - p = kmap(pg); + p = kmap_thread(pg); memset(p, init_payload, PAGE_SIZE); - kunmap(pg); + kunmap_thread(pg); } page_offset += sg_per_table; diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c index ff26ab0a5f60..8d0bae5a92e5 100644 --- a/drivers/target/target_core_transport.c +++ b/drivers/target/target_core_transport.c @@ -1692,11 +1692,11 @@ int target_submit_cmd_map_sgls(struct se_cmd *se_cmd, struct se_session *se_sess unsigned char *buf = NULL; if (sgl) - buf = kmap(sg_page(sgl)) + sgl->offset; + buf = kmap_thread(sg_page(sgl)) + sgl->offset; if (buf) { memset(buf, 0, sgl->length); - kunmap(sg_page(sgl)); + kunmap_thread(sg_page(sgl)); } }