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Fri, 9 Oct 2020 19:53:18 +0000 (UTC) IronPort-SDR: ZCR9s9EoGh68TBRBxsLCG5kGqzziq5zSdqE7s5qQ7V6KRT6iWBcx4TQ8HS8vHbiFn0QlZLt8tP 0XRdGRBkf5cQ== X-IronPort-AV: E=McAfee;i="6000,8403,9769"; a="227179134" X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="227179134" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by orsmga104.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 Cc: Ira Weiny , 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 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 Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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, st= ruct se_cmd *cmd) unsigned char *buf, *not_zero; int ret; =20 - buf =3D kmap(sg_page(sg)) + sg->offset; + buf =3D 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, st= ruct se_cmd *cmd) * incoming WRITE_SAME payload does not contain zeros. */ not_zero =3D memchr_inv(buf, 0x00, cmd->data_length); - kunmap(sg_page(sg)); + kunmap_thread(sg_page(sg)); =20 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_de= v, struct rd_dev_sg_table * sg_assign_page(&sg[j], pg); sg[j].length =3D PAGE_SIZE; =20 - p =3D kmap(pg); + p =3D kmap_thread(pg); memset(p, init_payload, PAGE_SIZE); - kunmap(pg); + kunmap_thread(pg); } =20 page_offset +=3D sg_per_table; diff --git a/drivers/target/target_core_transport.c b/drivers/target/targ= et_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 =3D NULL; =20 if (sgl) - buf =3D kmap(sg_page(sgl)) + sgl->offset; + buf =3D kmap_thread(sg_page(sgl)) + sgl->offset; =20 if (buf) { memset(buf, 0, sgl->length); - kunmap(sg_page(sgl)); + kunmap_thread(sg_page(sgl)); } } =20 --=20 2.28.0.rc0.12.gb6a658bd00c9