From arve@android.com Fri Jan 16 18:13:31 2009 From: Arve Hjønnevåg Date: Wed, 14 Jan 2009 16:54:16 -0800 Subject: Staging: android: Add lowmemorykiller documentation. To: greg@kroah.com Cc: Alan Cox , Pavel Machek , Brian Swetland , San Mehat , Robert Love , linux-kernel@vger.kernel.org, Arve Hjønnevåg Message-ID: <1231980856-30600-1-git-send-email-arve@android.com> Signed-off-by: Arve Hjønnevåg Signed-off-by: Greg Kroah-Hartman --- drivers/staging/android/lowmemorykiller.txt | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) --- /dev/null +++ b/drivers/staging/android/lowmemorykiller.txt @@ -0,0 +1,16 @@ +The lowmemorykiller driver lets user-space specify a set of memory thresholds +where processes with a range of oom_adj values will get killed. Specify the +minimum oom_adj values in /sys/module/lowmemorykiller/parameters/adj and the +number of free pages in /sys/module/lowmemorykiller/parameters/minfree. Both +files take a comma separated list of numbers in ascending order. + +For example, write "0,8" to /sys/module/lowmemorykiller/parameters/adj and +"1024,4096" to /sys/module/lowmemorykiller/parameters/minfree to kill processes +with a oom_adj value of 8 or higher when the free memory drops below 4096 pages +and kill processes with a oom_adj value of 0 or higher when the free memory +drops below 1024 pages. + +The driver considers memory used for caches to be free, but if a large +percentage of the cached memory is locked this can be very inaccurate +and processes may not get killed until the normal oom killer is triggered. +