From patchwork Fri Oct 9 19:50:10 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ira Weiny X-Patchwork-Id: 11827753 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id B39A01580 for ; Fri, 9 Oct 2020 19:52:57 +0000 (UTC) Received: from ml01.01.org (ml01.01.org [198.145.21.10]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 959FA223FB for ; Fri, 9 Oct 2020 19:52:57 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 959FA223FB Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-nvdimm-bounces@lists.01.org Received: from ml01.vlan13.01.org (localhost [IPv6:::1]) by ml01.01.org (Postfix) with ESMTP id 85A451594D315; Fri, 9 Oct 2020 12:52:57 -0700 (PDT) Received-SPF: Pass (mailfrom) identity=mailfrom; client-ip=134.134.136.126; helo=mga18.intel.com; envelope-from=ira.weiny@intel.com; receiver= Received: from mga18.intel.com (mga18.intel.com [134.134.136.126]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id 8A77B1503868D for ; Fri, 9 Oct 2020 12:52:55 -0700 (PDT) IronPort-SDR: VNI0Hq+e453j1sn9I1w48iNNJfpnDlJBi0elJEP54z9M+dWCIswbh2SixtLeswUDX+AQsij3/S 0MA7fF2C28vg== X-IronPort-AV: E=McAfee;i="6000,8403,9769"; a="153363713" X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="153363713" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga005.jf.intel.com ([10.7.209.41]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:52:55 -0700 IronPort-SDR: TN82OMSOJnR+1dzdu/wtYu+HarPMiqU5tCJLq9k+HDWuiKzSJliaVoZHfBedXzzykRk72guGi9 gJFQG6Pg4N1Q== X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="529053748" Received: from iweiny-desk2.sc.intel.com (HELO localhost) ([10.3.52.147]) by orsmga005-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:52:54 -0700 From: ira.weiny@intel.com To: Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski , Peter Zijlstra Subject: [PATCH RFC PKS/PMEM 35/58] fs: Utilize new kmap_thread() Date: Fri, 9 Oct 2020 12:50:10 -0700 Message-Id: <20201009195033.3208459-36-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 Message-ID-Hash: 45I22ONTN63SAPGLYAO2WA7ZBJM3VVDS X-Message-ID-Hash: 45I22ONTN63SAPGLYAO2WA7ZBJM3VVDS X-MailFrom: ira.weiny@intel.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; suspicious-header CC: Alexander Viro , Jens Axboe , x86@kernel.org, Dave Hansen , 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, cluste r-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 X-Mailman-Version: 3.1.1 Precedence: list List-Id: "Linux-nvdimm developer list." Archived-At: List-Archive: List-Help: List-Post: List-Subscribe: List-Unsubscribe: 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: Jens Axboe Signed-off-by: Ira Weiny --- fs/aio.c | 4 ++-- fs/binfmt_elf.c | 4 ++-- fs/binfmt_elf_fdpic.c | 4 ++-- fs/exec.c | 10 +++++----- fs/io_uring.c | 4 ++-- fs/splice.c | 4 ++-- 6 files changed, 15 insertions(+), 15 deletions(-) diff --git a/fs/aio.c b/fs/aio.c index d5ec30385566..27f95996d25f 100644 --- a/fs/aio.c +++ b/fs/aio.c @@ -1223,10 +1223,10 @@ static long aio_read_events_ring(struct kioctx *ctx, avail = min(avail, nr - ret); avail = min_t(long, avail, AIO_EVENTS_PER_PAGE - pos); - ev = kmap(page); + ev = kmap_thread(page); copy_ret = copy_to_user(event + ret, ev + pos, sizeof(*ev) * avail); - kunmap(page); + kunmap_thread(page); if (unlikely(copy_ret)) { ret = -EFAULT; diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c index 13d053982dd7..1a332ef1ae03 100644 --- a/fs/binfmt_elf.c +++ b/fs/binfmt_elf.c @@ -2430,9 +2430,9 @@ static int elf_core_dump(struct coredump_params *cprm) page = get_dump_page(addr); if (page) { - void *kaddr = kmap(page); + void *kaddr = kmap_thread(page); stop = !dump_emit(cprm, kaddr, PAGE_SIZE); - kunmap(page); + kunmap_thread(page); put_page(page); } else stop = !dump_skip(cprm, PAGE_SIZE); diff --git a/fs/binfmt_elf_fdpic.c b/fs/binfmt_elf_fdpic.c index 50f845702b92..8fbe188e0fdd 100644 --- a/fs/binfmt_elf_fdpic.c +++ b/fs/binfmt_elf_fdpic.c @@ -1542,9 +1542,9 @@ static bool elf_fdpic_dump_segments(struct coredump_params *cprm) bool res; struct page *page = get_dump_page(addr); if (page) { - void *kaddr = kmap(page); + void *kaddr = kmap_thread(page); res = dump_emit(cprm, kaddr, PAGE_SIZE); - kunmap(page); + kunmap_thread(page); put_page(page); } else { res = dump_skip(cprm, PAGE_SIZE); diff --git a/fs/exec.c b/fs/exec.c index a91003e28eaa..3948b8511e3a 100644 --- a/fs/exec.c +++ b/fs/exec.c @@ -575,11 +575,11 @@ static int copy_strings(int argc, struct user_arg_ptr argv, if (kmapped_page) { flush_kernel_dcache_page(kmapped_page); - kunmap(kmapped_page); + kunmap_thread(kmapped_page); put_arg_page(kmapped_page); } kmapped_page = page; - kaddr = kmap(kmapped_page); + kaddr = kmap_thread(kmapped_page); kpos = pos & PAGE_MASK; flush_arg_page(bprm, kpos, kmapped_page); } @@ -593,7 +593,7 @@ static int copy_strings(int argc, struct user_arg_ptr argv, out: if (kmapped_page) { flush_kernel_dcache_page(kmapped_page); - kunmap(kmapped_page); + kunmap_thread(kmapped_page); put_arg_page(kmapped_page); } return ret; @@ -871,11 +871,11 @@ int transfer_args_to_stack(struct linux_binprm *bprm, for (index = MAX_ARG_PAGES - 1; index >= stop; index--) { unsigned int offset = index == stop ? bprm->p & ~PAGE_MASK : 0; - char *src = kmap(bprm->page[index]) + offset; + char *src = kmap_thread(bprm->page[index]) + offset; sp -= PAGE_SIZE - offset; if (copy_to_user((void *) sp, src, PAGE_SIZE - offset) != 0) ret = -EFAULT; - kunmap(bprm->page[index]); + kunmap_thread(bprm->page[index]); if (ret) goto out; } diff --git a/fs/io_uring.c b/fs/io_uring.c index aae0ef2ec34d..f59bb079822d 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -2903,7 +2903,7 @@ static ssize_t loop_rw_iter(int rw, struct file *file, struct kiocb *kiocb, iovec = iov_iter_iovec(iter); } else { /* fixed buffers import bvec */ - iovec.iov_base = kmap(iter->bvec->bv_page) + iovec.iov_base = kmap_thread(iter->bvec->bv_page) + iter->iov_offset; iovec.iov_len = min(iter->count, iter->bvec->bv_len - iter->iov_offset); @@ -2918,7 +2918,7 @@ static ssize_t loop_rw_iter(int rw, struct file *file, struct kiocb *kiocb, } if (iov_iter_is_bvec(iter)) - kunmap(iter->bvec->bv_page); + kunmap_thread(iter->bvec->bv_page); if (nr < 0) { if (!ret) diff --git a/fs/splice.c b/fs/splice.c index ce75aec52274..190c4d218c30 100644 --- a/fs/splice.c +++ b/fs/splice.c @@ -815,9 +815,9 @@ static int write_pipe_buf(struct pipe_inode_info *pipe, struct pipe_buffer *buf, void *data; loff_t tmp = sd->pos; - data = kmap(buf->page); + data = kmap_thread(buf->page); ret = __kernel_write(sd->u.file, data + buf->offset, sd->len, &tmp); - kunmap(buf->page); + kunmap_thread(buf->page); return ret; }