From: Hideo AOKI Attached patch is a short description for /proc/sys/vm/swap_token_timeout. Signed-off-by: Hideo Aoki Signed-off-by: Andrew Morton --- 25-akpm/Documentation/filesystems/proc.txt | 8 ++++++++ 25-akpm/Documentation/sysctl/vm.txt | 2 +- 2 files changed, 9 insertions(+), 1 deletion(-) diff -puN Documentation/filesystems/proc.txt~vm-thrashing-control-tuning-docs Documentation/filesystems/proc.txt --- 25/Documentation/filesystems/proc.txt~vm-thrashing-control-tuning-docs Thu Oct 7 13:59:19 2004 +++ 25-akpm/Documentation/filesystems/proc.txt Thu Oct 7 13:59:19 2004 @@ -1295,6 +1295,14 @@ block_dump block_dump enables block I/O debugging when set to a nonzero value. More information on block I/O debugging is in Documentation/laptop-mode.txt. +swap_token_timeout +------------------ + +This file contains valid hold time of swap out protection token. The Linux +VM has token based thrashing control mechanism and uses the token to prevent +unnecessary page faults in thrashing situation. The unit of the value is +second. The value would be useful to tune thrashing behavior. + 2.5 /proc/sys/dev - Device specific parameters ---------------------------------------------- diff -puN Documentation/sysctl/vm.txt~vm-thrashing-control-tuning-docs Documentation/sysctl/vm.txt --- 25/Documentation/sysctl/vm.txt~vm-thrashing-control-tuning-docs Thu Oct 7 13:59:19 2004 +++ 25-akpm/Documentation/sysctl/vm.txt Thu Oct 7 13:59:19 2004 @@ -31,7 +31,7 @@ Currently, these files are in /proc/sys/ dirty_ratio, dirty_background_ratio, dirty_expire_centisecs, dirty_writeback_centisecs, vfs_cache_pressure, laptop_mode, -block_dump: +block_dump, swap_token_timeout: See Documentation/filesystems/proc.txt _