Update the doc. Signed-off-by: Xishi Qiu <qiuxishi@xxxxxxxxxx> --- 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@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>