From patchwork Tue Jul 26 00:35:17 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Kirill A . Shutemov" X-Patchwork-Id: 9247457 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id C444B60B17 for ; Tue, 26 Jul 2016 00:45:40 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B3D0A2787C for ; Tue, 26 Jul 2016 00:45:40 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id A8BB427AC2; Tue, 26 Jul 2016 00:45:40 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 458242787C for ; Tue, 26 Jul 2016 00:45:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756842AbcGZAmc (ORCPT ); Mon, 25 Jul 2016 20:42:32 -0400 Received: from mga02.intel.com ([134.134.136.20]:14905 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755300AbcGZAgC (ORCPT ); Mon, 25 Jul 2016 20:36:02 -0400 Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by orsmga101.jf.intel.com with ESMTP; 25 Jul 2016 17:36:02 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.28,421,1464678000"; d="scan'208";a="145359355" Received: from black.fi.intel.com ([10.237.72.93]) by fmsmga004.fm.intel.com with ESMTP; 25 Jul 2016 17:35:57 -0700 Received: by black.fi.intel.com (Postfix, from userid 1000) id 6587C7A0; Tue, 26 Jul 2016 03:35:47 +0300 (EEST) From: "Kirill A. Shutemov" To: "Theodore Ts'o" , Andreas Dilger , Jan Kara Cc: Alexander Viro , Hugh Dickins , Andrea Arcangeli , Andrew Morton , Dave Hansen , Vlastimil Babka , Matthew Wilcox , Ross Zwisler , linux-ext4@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-block@vger.kernel.org, "Kirill A. Shutemov" Subject: [PATCHv1, RFC 15/33] filemap: allocate huge page in pagecache_get_page(), if allowed Date: Tue, 26 Jul 2016 03:35:17 +0300 Message-Id: <1469493335-3622-16-git-send-email-kirill.shutemov@linux.intel.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1469493335-3622-1-git-send-email-kirill.shutemov@linux.intel.com> References: <1469493335-3622-1-git-send-email-kirill.shutemov@linux.intel.com> Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Write path allocate pages using pagecache_get_page(). We should be able to allocate huge pages there, if it's allowed. As usually, fallback to small pages, if failed. Signed-off-by: Kirill A. Shutemov --- mm/filemap.c | 17 +++++++++++++++-- 1 file changed, 15 insertions(+), 2 deletions(-) diff --git a/mm/filemap.c b/mm/filemap.c index 566c7e6ca423..ad73b99c5ba7 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -1274,13 +1274,16 @@ repeat: no_page: if (!page && (fgp_flags & FGP_CREAT)) { + pgoff_t hoffset; int err; if ((fgp_flags & FGP_WRITE) && mapping_cap_account_dirty(mapping)) gfp_mask |= __GFP_WRITE; if (fgp_flags & FGP_NOFS) gfp_mask &= ~__GFP_FS; - page = __page_cache_alloc(gfp_mask); + page = page_cache_alloc_huge(mapping, offset, gfp_mask); +no_huge: if (!page) + page = __page_cache_alloc(gfp_mask); if (!page) return NULL; @@ -1291,14 +1294,24 @@ no_page: if (fgp_flags & FGP_ACCESSED) __SetPageReferenced(page); - err = add_to_page_cache_lru(page, mapping, offset, + if (PageTransHuge(page)) + hoffset = round_down(offset, HPAGE_PMD_NR); + else + hoffset = offset; + + err = add_to_page_cache_lru(page, mapping, hoffset, gfp_mask & GFP_RECLAIM_MASK); if (unlikely(err)) { put_page(page); + if (PageTransHuge(page)) { + page = NULL; + goto no_huge; + } page = NULL; if (err == -EEXIST) goto repeat; } + page += offset - hoffset; } return page;