From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755224AbaFPJ1g (ORCPT ); Mon, 16 Jun 2014 05:27:36 -0400 Received: from szxga02-in.huawei.com ([119.145.14.65]:20666 "EHLO szxga02-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755164AbaFPJ0r (ORCPT ); Mon, 16 Jun 2014 05:26:47 -0400 Message-ID: <539EB7EE.3050502@huawei.com> Date: Mon, 16 Jun 2014 17:25:02 +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 4/8] mm: introduce cache_reclaim_s 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 This patch introduces a parameters cache_reclaim_s. It is used to reclaim page cache in circles. Signed-off-by: Xishi Qiu --- include/linux/swap.h | 2 ++ kernel/sysctl.c | 8 ++++++++ mm/vmscan.c | 4 ++++ 3 files changed, 14 insertions(+), 0 deletions(-) diff --git a/include/linux/swap.h b/include/linux/swap.h index dcbe1a3..bd85493 100644 --- a/include/linux/swap.h +++ b/include/linux/swap.h @@ -359,6 +359,8 @@ extern unsigned long vm_cache_limit_ratio_max; extern unsigned long vm_cache_limit_mbytes; extern unsigned long vm_cache_limit_mbytes_min; extern unsigned long vm_cache_limit_mbytes_max; +extern unsigned long vm_cache_reclaim_s; +extern unsigned long vm_cache_reclaim_s_min; extern int cache_limit_ratio_sysctl_handler(struct ctl_table *table, int write, void __user *buffer, size_t *length, loff_t *ppos); extern int cache_limit_mbytes_sysctl_handler(struct ctl_table *table, int write, diff --git a/kernel/sysctl.c b/kernel/sysctl.c index 9bb6f38..a8a09c4 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -1290,6 +1290,14 @@ static struct ctl_table vm_table[] = { .extra1 = &vm_cache_limit_mbytes_min, .extra2 = &vm_cache_limit_mbytes_max, }, + { + .procname = "cache_reclaim_s", + .data = &vm_cache_reclaim_s, + .maxlen = sizeof(vm_cache_reclaim_s), + .mode = 0644, + .proc_handler = proc_doulongvec_minmax, + .extra1 = &vm_cache_reclaim_s_min, + }, #ifdef CONFIG_COMPACTION { .procname = "compact_memory", diff --git a/mm/vmscan.c b/mm/vmscan.c index 707d3e3..61cedfc 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -137,6 +137,8 @@ unsigned long vm_cache_limit_ratio_max; unsigned long vm_cache_limit_mbytes __read_mostly; unsigned long vm_cache_limit_mbytes_min; unsigned long vm_cache_limit_mbytes_max; +unsigned long vm_cache_reclaim_s __read_mostly; +unsigned long vm_cache_reclaim_s_min; static LIST_HEAD(shrinker_list); static DECLARE_RWSEM(shrinker_rwsem); @@ -3390,6 +3392,8 @@ static void shrink_page_cache_init(void) vm_cache_limit_mbytes = 0; vm_cache_limit_mbytes_min = 0; vm_cache_limit_mbytes_max = totalram_pages; + vm_cache_reclaim_s = 0; + vm_cache_reclaim_s_min = 0; } static unsigned long __shrink_page_cache(gfp_t mask) -- 1.6.0.2