From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755146AbaFPJ0j (ORCPT ); Mon, 16 Jun 2014 05:26:39 -0400 Received: from szxga01-in.huawei.com ([119.145.14.64]:10325 "EHLO szxga01-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754904AbaFPJ0h (ORCPT ); Mon, 16 Jun 2014 05:26:37 -0400 Message-ID: <539EB7EA.7020705@huawei.com> Date: Mon, 16 Jun 2014 17:24:58 +0800 From: Xishi Qiu User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:12.0) Gecko/20120428 Thunderbird/12.0.1 MIME-Version: 1.0 To: Andrew Morton , Wanpeng Li , Greg Kroah-Hartman , , Peter Zijlstra , Rik van Riel , Johannes Weiner , Michal Hocko CC: Linux MM , LKML , Xishi Qiu , Li Zefan Subject: [PATCH 3/8] mm: implement page cache limit feature Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit X-Originating-IP: [10.177.25.179] X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add hooks when a page is added to page cache. Signed-off-by: Xishi Qiu --- mm/filemap.c | 3 +++ mm/hugetlb.c | 3 +++ mm/vmscan.c | 3 +++ 3 files changed, 9 insertions(+), 0 deletions(-) diff --git a/mm/filemap.c b/mm/filemap.c index 088358c..0e71a04 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -622,6 +622,9 @@ int add_to_page_cache_lru(struct page *page, struct address_space *mapping, void *shadow = NULL; int ret; + if (vm_cache_limit_mbytes && page_cache_over_limit()) + shrink_page_cache(gfp_mask); + __set_page_locked(page); ret = __add_to_page_cache_locked(page, mapping, offset, gfp_mask, &shadow); diff --git a/mm/hugetlb.c b/mm/hugetlb.c index c82290b..4dc8173 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -2851,6 +2851,9 @@ retry: int err; struct inode *inode = mapping->host; + if (vm_cache_limit_mbytes && page_cache_over_limit()) + shrink_page_cache(GFP_KERNEL); + err = add_to_page_cache(page, mapping, idx, GFP_KERNEL); if (err) { put_page(page); diff --git a/mm/vmscan.c b/mm/vmscan.c index ad01ff4..707d3e3 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -2977,6 +2977,9 @@ static unsigned long balance_pgdat(pg_data_t *pgdat, int order, }; count_vm_event(PAGEOUTRUN); + if (vm_cache_limit_mbytes && page_cache_over_limit()) + shrink_page_cache(GFP_KERNEL); + do { unsigned long lru_pages = 0; unsigned long nr_attempted = 0; -- 1.6.0.2