From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pa0-f51.google.com (mail-pa0-f51.google.com [209.85.220.51]) by kanga.kvack.org (Postfix) with ESMTP id 76C4F6B0031 for ; Mon, 16 Jun 2014 05:27:45 -0400 (EDT) Received: by mail-pa0-f51.google.com with SMTP id hz1so1113063pad.38 for ; Mon, 16 Jun 2014 02:27:45 -0700 (PDT) Received: from szxga01-in.huawei.com (szxga01-in.huawei.com. [119.145.14.64]) by mx.google.com with ESMTPS id oe5si10285008pbc.154.2014.06.16.02.27.41 for (version=TLSv1 cipher=RC4-SHA bits=128/128); Mon, 16 Jun 2014 02:27:44 -0700 (PDT) Message-ID: <539EB7EA.7020705@huawei.com> Date: Mon, 16 Jun 2014 17:24:58 +0800 From: Xishi Qiu MIME-Version: 1.0 Subject: [PATCH 3/8] mm: implement page cache limit feature Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Andrew Morton , Wanpeng Li , Greg Kroah-Hartman , aquini@redhat.com, Peter Zijlstra , Rik van Riel , Johannes Weiner , Michal Hocko Cc: Linux MM , LKML , Xishi Qiu , Li Zefan 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 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org