From patchwork Fri Oct 9 19:49:56 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ira Weiny X-Patchwork-Id: 11829163 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 DE79515E6 for ; Fri, 9 Oct 2020 20:06:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C8DE02225B for ; Fri, 9 Oct 2020 20:06:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390515AbgJIUFf (ORCPT ); Fri, 9 Oct 2020 16:05:35 -0400 Received: from mga01.intel.com ([192.55.52.88]:3555 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389053AbgJITwO (ORCPT ); Fri, 9 Oct 2020 15:52:14 -0400 IronPort-SDR: ZY1DEGETObfXdZFnoxsbKB7fzbzbRt8xd8bKb+YrYXtkHifcbpn+XQoZG1l3r2KlCKayB9JESb /9AfAPRZl62Q== X-IronPort-AV: E=McAfee;i="6000,8403,9769"; a="182976216" X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="182976216" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:52:01 -0700 IronPort-SDR: tVhE30/49ehqkoc80ZCcDXB4dMTZze5YTnWPIjaBRWP4P6o/AEUDuRNENWQluyt3yOqCx99fob q9C+vTCoMURQ== X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="519846944" 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 12:52:01 -0700 From: ira.weiny@intel.com To: Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski , Peter Zijlstra Cc: Ira Weiny , Trond Myklebust , Anna Schumaker , 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 21/58] fs/nfs: Utilize new kmap_thread() Date: Fri, 9 Oct 2020 12:49:56 -0700 Message-Id: <20201009195033.3208459-22-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 Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org From: Ira Weiny The kmap() calls in this FS are localized to a single thread. To avoid the over head of global PKRS updates use the new kmap_thread() call. Cc: Trond Myklebust Cc: Anna Schumaker Signed-off-by: Ira Weiny --- fs/nfs/dir.c | 20 ++++++++++---------- 1 file changed, 10 insertions(+), 10 deletions(-) diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index cb52db9a0cfb..fee321acccb4 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -213,7 +213,7 @@ int nfs_readdir_make_qstr(struct qstr *string, const char *name, unsigned int le static int nfs_readdir_add_to_array(struct nfs_entry *entry, struct page *page) { - struct nfs_cache_array *array = kmap(page); + struct nfs_cache_array *array = kmap_thread(page); struct nfs_cache_array_entry *cache_entry; int ret; @@ -235,7 +235,7 @@ int nfs_readdir_add_to_array(struct nfs_entry *entry, struct page *page) if (entry->eof != 0) array->eof_index = array->size; out: - kunmap(page); + kunmap_thread(page); return ret; } @@ -347,7 +347,7 @@ int nfs_readdir_search_array(nfs_readdir_descriptor_t *desc) struct nfs_cache_array *array; int status; - array = kmap(desc->page); + array = kmap_thread(desc->page); if (*desc->dir_cookie == 0) status = nfs_readdir_search_for_pos(array, desc); @@ -359,7 +359,7 @@ int nfs_readdir_search_array(nfs_readdir_descriptor_t *desc) desc->current_index += array->size; desc->page_index++; } - kunmap(desc->page); + kunmap_thread(desc->page); return status; } @@ -602,10 +602,10 @@ int nfs_readdir_page_filler(nfs_readdir_descriptor_t *desc, struct nfs_entry *en out_nopages: if (count == 0 || (status == -EBADCOOKIE && entry->eof != 0)) { - array = kmap(page); + array = kmap_thread(page); array->eof_index = array->size; status = 0; - kunmap(page); + kunmap_thread(page); } put_page(scratch); @@ -669,7 +669,7 @@ int nfs_readdir_xdr_to_array(nfs_readdir_descriptor_t *desc, struct page *page, goto out; } - array = kmap(page); + array = kmap_thread(page); status = nfs_readdir_alloc_pages(pages, array_size); if (status < 0) @@ -691,7 +691,7 @@ int nfs_readdir_xdr_to_array(nfs_readdir_descriptor_t *desc, struct page *page, nfs_readdir_free_pages(pages, array_size); out_release_array: - kunmap(page); + kunmap_thread(page); nfs4_label_free(entry.label); out: nfs_free_fattr(entry.fattr); @@ -803,7 +803,7 @@ int nfs_do_filldir(nfs_readdir_descriptor_t *desc) struct nfs_cache_array *array = NULL; struct nfs_open_dir_context *ctx = file->private_data; - array = kmap(desc->page); + array = kmap_thread(desc->page); for (i = desc->cache_entry_index; i < array->size; i++) { struct nfs_cache_array_entry *ent; @@ -827,7 +827,7 @@ int nfs_do_filldir(nfs_readdir_descriptor_t *desc) if (array->eof_index >= 0) desc->eof = true; - kunmap(desc->page); + kunmap_thread(desc->page); dfprintk(DIRCACHE, "NFS: nfs_do_filldir() filling ended @ cookie %Lu; returning = %d\n", (unsigned long long)*desc->dir_cookie, res); return res;