From mboxrd@z Thu Jan 1 00:00:00 1970 From: ira.weiny@intel.com Date: Fri, 09 Oct 2020 19:50:23 +0000 Subject: [PATCH RFC PKS/PMEM 48/58] drivers/md: Utilize new kmap_thread() Message-Id: <20201009195033.3208459-49-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, linux-mmc@vger.kernel.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, Kent Overstreet , 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, Coly Li , linux-block@vger.kernel.org, linux-bcache@vger.kernel.org, Dan Williams , io-uring@vger.kernel.org, linux-nfs@vger.kernel.org, linux-ntfs-dev@lists.sourceforge.net, netdev@vger.kernel.org, kexec@lists.infradead.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 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: Coly Li (maintainer:BCACHE (BLOCK LAYER CACHE)) Cc: Kent Overstreet (maintainer:BCACHE (BLOCK LAYER CACHE)) Signed-off-by: Ira Weiny --- drivers/md/bcache/request.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/md/bcache/request.c b/drivers/md/bcache/request.c index c7cadaafa947..a4571f6d09dd 100644 --- a/drivers/md/bcache/request.c +++ b/drivers/md/bcache/request.c @@ -44,10 +44,10 @@ static void bio_csum(struct bio *bio, struct bkey *k) uint64_t csum = 0; bio_for_each_segment(bv, bio, iter) { - void *d = kmap(bv.bv_page) + bv.bv_offset; + void *d = kmap_thread(bv.bv_page) + bv.bv_offset; csum = bch_crc64_update(csum, d, bv.bv_len); - kunmap(bv.bv_page); + kunmap_thread(bv.bv_page); } k->ptr[KEY_PTRS(k)] = csum & (~0ULL >> 1); -- 2.28.0.rc0.12.gb6a658bd00c9