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Fri, 9 Oct 2020 19:53:55 +0000 (UTC) IronPort-SDR: qYYBz/f81y5rxmWx9PxwC3u8ehMXJgioYjKc98v5xUCcGfvwtjeEP8eKOZzvtiC8uggX4/BURc zEdd4Ywvm2cQ== X-IronPort-AV: E=McAfee;i="6000,8403,9769"; a="145397679" X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="145397679" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:53:54 -0700 IronPort-SDR: bZn0Zma13YkX7FJFkNsCYMjMNff2FSiB/MgoUwYT50qMOfu0yRYfZtOtUYx1uwuwPtN+tdFX+r hwly4wq6Ikyg== X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="519847271" Received: from iweiny-desk2.sc.intel.com (HELO localhost) ([10.3.52.147]) by fmsmga005-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:53:53 -0700 From: ira.weiny@intel.com To: Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski , Peter Zijlstra Cc: Ira Weiny , Alexander Viro , =?utf-8?b?SsOpcsO0bWUgR2xpc3Nl?= , Martin KaFai Lau , Song Liu , Yonghong Song , Andrii Nakryiko , John Fastabend , KP Singh , 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 53/58] lib: Utilize new kmap_thread() Date: Fri, 9 Oct 2020 12:50:28 -0700 Message-Id: <20201009195033.3208459-54-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 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: Alexander Viro Cc: "Jérôme Glisse" Cc: Martin KaFai Lau Cc: Song Liu Cc: Yonghong Song Cc: Andrii Nakryiko Cc: John Fastabend Cc: KP Singh Signed-off-by: Ira Weiny --- lib/iov_iter.c | 12 ++++++------ lib/test_bpf.c | 4 ++-- lib/test_hmm.c | 8 ++++---- 3 files changed, 12 insertions(+), 12 deletions(-) diff --git a/lib/iov_iter.c b/lib/iov_iter.c index 5e40786c8f12..1d47f957cf95 100644 --- a/lib/iov_iter.c +++ b/lib/iov_iter.c @@ -208,7 +208,7 @@ static size_t copy_page_to_iter_iovec(struct page *page, size_t offset, size_t b } /* Too bad - revert to non-atomic kmap */ - kaddr = kmap(page); + kaddr = kmap_thread(page); from = kaddr + offset; left = copyout(buf, from, copy); copy -= left; @@ -225,7 +225,7 @@ static size_t copy_page_to_iter_iovec(struct page *page, size_t offset, size_t b from += copy; bytes -= copy; } - kunmap(page); + kunmap_thread(page); done: if (skip == iov->iov_len) { @@ -292,7 +292,7 @@ static size_t copy_page_from_iter_iovec(struct page *page, size_t offset, size_t } /* Too bad - revert to non-atomic kmap */ - kaddr = kmap(page); + kaddr = kmap_thread(page); to = kaddr + offset; left = copyin(to, buf, copy); copy -= left; @@ -309,7 +309,7 @@ static size_t copy_page_from_iter_iovec(struct page *page, size_t offset, size_t to += copy; bytes -= copy; } - kunmap(page); + kunmap_thread(page); done: if (skip == iov->iov_len) { @@ -1742,10 +1742,10 @@ int iov_iter_for_each_range(struct iov_iter *i, size_t bytes, return 0; iterate_all_kinds(i, bytes, v, -EINVAL, ({ - w.iov_base = kmap(v.bv_page) + v.bv_offset; + w.iov_base = kmap_thread(v.bv_page) + v.bv_offset; w.iov_len = v.bv_len; err = f(&w, context); - kunmap(v.bv_page); + kunmap_thread(v.bv_page); err;}), ({ w = v; err = f(&w, context);}) diff --git a/lib/test_bpf.c b/lib/test_bpf.c index ca7d635bccd9..441f822f56ba 100644 --- a/lib/test_bpf.c +++ b/lib/test_bpf.c @@ -6506,11 +6506,11 @@ static void *generate_test_data(struct bpf_test *test, int sub) if (!page) goto err_kfree_skb; - ptr = kmap(page); + ptr = kmap_thread(page); if (!ptr) goto err_free_page; memcpy(ptr, test->frag_data, MAX_DATA); - kunmap(page); + kunmap_thread(page); skb_add_rx_frag(skb, 0, page, 0, MAX_DATA, MAX_DATA); } diff --git a/lib/test_hmm.c b/lib/test_hmm.c index e7dc3de355b7..e40d26f97f45 100644 --- a/lib/test_hmm.c +++ b/lib/test_hmm.c @@ -329,9 +329,9 @@ static int dmirror_do_read(struct dmirror *dmirror, unsigned long start, if (!page) return -ENOENT; - tmp = kmap(page); + tmp = kmap_thread(page); memcpy(ptr, tmp, PAGE_SIZE); - kunmap(page); + kunmap_thread(page); ptr += PAGE_SIZE; bounce->cpages++; @@ -398,9 +398,9 @@ static int dmirror_do_write(struct dmirror *dmirror, unsigned long start, if (!page || xa_pointer_tag(entry) != DPT_XA_TAG_WRITE) return -ENOENT; - tmp = kmap(page); + tmp = kmap_thread(page); memcpy(tmp, ptr, PAGE_SIZE); - kunmap(page); + kunmap_thread(page); ptr += PAGE_SIZE; bounce->cpages++;