From mboxrd@z Thu Jan 1 00:00:00 1970 From: ira.weiny@intel.com Date: Fri, 09 Oct 2020 19:49:42 +0000 Subject: [PATCH RFC PKS/PMEM 07/58] drivers/drbd: Utilize new kmap_thread() Message-Id: <20201009195033.3208459-8-ira.weiny@intel.com> List-Id: References: <20201009195033.3208459-1-ira.weiny@intel.com> In-Reply-To: <20201009195033.3208459-1-ira.weiny@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski , Peter Zijlstra Cc: linux-aio@kvack.org, linux-efi@vger.kernel.org, kvm@vger.kernel.org, linux-doc@vger.kernel.org, kexec@lists.infradead.org, Dave Hansen , dri-devel@lists.freedesktop.org, linux-mm@kvack.org, target-devel@vger.kernel.org, linux-mtd@lists.infradead.org, linux-kselftest@vger.kernel.org, samba-technical@lists.samba.org, Ira Weiny , ceph-devel@vger.kernel.org, drbd-dev@lists.linbit.com, devel@driverdev.osuosl.org, linux-cifs@vger.kernel.org, linux-nilfs@vger.kernel.org, linux-scsi@vger.kernel.org, linux-nvdimm@lists.01.org, linux-rdma@vger.kernel.org, x86@kernel.org, amd-gfx@lists.freedesktop.org, linux-afs@lists.infradead.org, cluster-devel@redhat.com, linux-cachefs@redhat.com, intel-wired-lan@lists.osuosl.org, xen-devel@lists.xenproject.org, linux-ext4@vger.kernel.org, Fenghua Yu , linux-um@lists.infradead.org, intel-gfx@lists.freedesktop.org, ecryptfs@vger.kernel.org, linux-erofs@lists.ozlabs.org, reiserfs-devel@vger.kernel.org, linux-block@vger.kernel.org, linux-bcache@vger.kernel.org, Dan Williams , io-uring@vger.kernel.org, Jens Axboe , linux-nfs@vger.kernel.org, linux-ntfs-dev@lists.sourceforge.net, netdev@vger.kernel.org, linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-fsdevel@vger.kernel.org, bpf@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-btrfs@vger.kernel.org Archived-At: List-Archive: List-Post: From: Ira Weiny The 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. Cc: Jens Axboe Signed-off-by: Ira Weiny --- drivers/block/drbd/drbd_main.c | 4 ++-- drivers/block/drbd/drbd_receiver.c | 12 ++++++------ 2 files changed, 8 insertions(+), 8 deletions(-) diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c index 573dbf6f0c31..f0d0c6b0745e 100644 --- a/drivers/block/drbd/drbd_main.c +++ b/drivers/block/drbd/drbd_main.c @@ -1532,9 +1532,9 @@ static int _drbd_no_send_page(struct drbd_peer_device *peer_device, struct page int err; socket = peer_device->connection->data.socket; - addr = kmap(page) + offset; + addr = kmap_thread(page) + offset; err = drbd_send_all(peer_device->connection, socket, addr, size, msg_flags); - kunmap(page); + kunmap_thread(page); if (!err) peer_device->device->send_cnt += size >> 9; return err; diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c index 422363daa618..4704bc0564e2 100644 --- a/drivers/block/drbd/drbd_receiver.c +++ b/drivers/block/drbd/drbd_receiver.c @@ -1951,13 +1951,13 @@ read_in_block(struct drbd_peer_device *peer_device, u64 id, sector_t sector, page = peer_req->pages; page_chain_for_each(page) { unsigned len = min_t(int, ds, PAGE_SIZE); - data = kmap(page); + data = kmap_thread(page); err = drbd_recv_all_warn(peer_device->connection, data, len); if (drbd_insert_fault(device, DRBD_FAULT_RECEIVE)) { drbd_err(device, "Fault injection: Corrupting data on receive\n"); data[0] = data[0] ^ (unsigned long)-1; } - kunmap(page); + kunmap_thread(page); if (err) { drbd_free_peer_req(device, peer_req); return NULL; @@ -1992,7 +1992,7 @@ static int drbd_drain_block(struct drbd_peer_device *peer_device, int data_size) page = drbd_alloc_pages(peer_device, 1, 1); - data = kmap(page); + data = kmap_thread(page); while (data_size) { unsigned int len = min_t(int, data_size, PAGE_SIZE); @@ -2001,7 +2001,7 @@ static int drbd_drain_block(struct drbd_peer_device *peer_device, int data_size) break; data_size -= len; } - kunmap(page); + kunmap_thread(page); drbd_free_pages(peer_device->device, page, 0); return err; } @@ -2033,10 +2033,10 @@ static int recv_dless_read(struct drbd_peer_device *peer_device, struct drbd_req D_ASSERT(peer_device->device, sector = bio->bi_iter.bi_sector); bio_for_each_segment(bvec, bio, iter) { - void *mapped = kmap(bvec.bv_page) + bvec.bv_offset; + void *mapped = kmap_thread(bvec.bv_page) + bvec.bv_offset; expect = min_t(int, data_size, bvec.bv_len); err = drbd_recv_all_warn(peer_device->connection, mapped, expect); - kunmap(bvec.bv_page); + kunmap_thread(bvec.bv_page); if (err) return err; data_size -= expect; -- 2.28.0.rc0.12.gb6a658bd00c9