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Fri, 9 Oct 2020 19:53:40 +0000 (UTC) IronPort-SDR: Mf1RUk6FStgqPBuRha9v0zVI0latSxcXkWkNaNYzhBYv0rJOAkC65TZq6ZtS/fCAteuMfjkrLC 8JzxSWlV/MMQ== X-IronPort-AV: E=McAfee;i="6000,8403,9769"; a="162893645" X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="162893645" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:53:38 -0700 IronPort-SDR: 77OyjRxsHRqLdlwGyIEmSTWShPVNVQULX7LnGcMeG3NkwcCC4UbesWRkZ9bTTqcjV6t6jmiGf4 lDgqS7BTpvKw== X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="389237394" Received: from iweiny-desk2.sc.intel.com (HELO localhost) ([10.3.52.147]) by orsmga001-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:53:37 -0700 From: ira.weiny@intel.com To: Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski , Peter Zijlstra Cc: Ira Weiny , Coly Li , Kent Overstreet , 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 48/58] drivers/md: Utilize new kmap_thread() Date: Fri, 9 Oct 2020 12:50:23 -0700 Message-Id: <20201009195033.3208459-49-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 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 =3D 0; =20 bio_for_each_segment(bv, bio, iter) { - void *d =3D kmap(bv.bv_page) + bv.bv_offset; + void *d =3D kmap_thread(bv.bv_page) + bv.bv_offset; =20 csum =3D bch_crc64_update(csum, d, bv.bv_len); - kunmap(bv.bv_page); + kunmap_thread(bv.bv_page); } =20 k->ptr[KEY_PTRS(k)] =3D csum & (~0ULL >> 1); --=20 2.28.0.rc0.12.gb6a658bd00c9