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 4879B6B0036 for ; Mon, 16 Jun 2014 05:29:18 -0400 (EDT) Received: by mail-pa0-f51.google.com with SMTP id hz1so1114352pad.38 for ; Mon, 16 Jun 2014 02:29:18 -0700 (PDT) Received: from szxga02-in.huawei.com (szxga02-in.huawei.com. [119.145.14.65]) by mx.google.com with ESMTPS id ey5si10324407pbb.58.2014.06.16.02.29.15 for (version=TLSv1 cipher=RC4-SHA bits=128/128); Mon, 16 Jun 2014 02:29:17 -0700 (PDT) Message-ID: <539EB803.9070001@huawei.com> Date: Mon, 16 Jun 2014 17:25:23 +0800 From: Xishi Qiu MIME-Version: 1.0 Subject: [PATCH 8/8] doc: update Documentation/sysctl/vm.txt 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 Update the doc. Signed-off-by: Xishi Qiu --- Documentation/sysctl/vm.txt | 43 +++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 43 insertions(+), 0 deletions(-) diff --git a/Documentation/sysctl/vm.txt b/Documentation/sysctl/vm.txt index dd9d0e3..8008e53 100644 --- a/Documentation/sysctl/vm.txt +++ b/Documentation/sysctl/vm.txt @@ -20,6 +20,10 @@ Currently, these files are in /proc/sys/vm: - admin_reserve_kbytes - block_dump +- cache_limit_mbytes +- cache_limit_ratio +- cache_reclaim_s +- cache_reclaim_weight - compact_memory - dirty_background_bytes - dirty_background_ratio @@ -97,6 +101,45 @@ information on block I/O debugging is in Documentation/laptops/laptop-mode.txt. ============================================================== +cache_limit_mbytes + +This is used to limit page cache amount. The input unit is MB, value range +is from 0 to totalram_pages. If this is set to 0, it will not limit page cache. +When written to the file, cache_limit_ratio will be updated too. + +The default value is 0. + +============================================================== + +cache_limit_ratio + +This is used to limit page cache amount. The input unit is percent, value +range is from 0 to 100. If this is set to 0, it will not limit page cache. +When written to the file, cache_limit_mbytes will be updated too. + +The default value is 0. + +============================================================== + +cache_reclaim_s + +This is used to reclaim page cache in circles. The input unit is second, +the minimum value is 0. If this is set to 0, it will disable the feature. + +The default value is 0. + +============================================================== + +cache_reclaim_weight + +This is used to speed up page cache reclaim. It depend on enabling +cache_limit_mbytes/cache_limit_ratio or cache_reclaim_s. Value range is +from 1(slow) to 100(fast). + +The default value is 1. + +============================================================== + compact_memory Available only when CONFIG_COMPACTION is set. When 1 is written to the file, -- 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