This patch adds documentation about new reclaim field in proc.txt Cc: Rob Landley <rob@xxxxxxxxxxx> Signed-off-by: Minchan Kim <minchan@xxxxxxxxxx> --- Documentation/filesystems/proc.txt | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt index 488c094..c1f5ee4 100644 --- a/Documentation/filesystems/proc.txt +++ b/Documentation/filesystems/proc.txt @@ -136,6 +136,7 @@ Table 1-1: Process specific entries in /proc maps Memory maps to executables and library files (2.4) mem Memory held by this process root Link to the root directory of this process + reclaim Reclaim pages in this process stat Process status statm Process memory status information status Process status in human readable form @@ -489,6 +490,29 @@ To clear the soft-dirty bit Any other value written to /proc/PID/clear_refs will have no effect. +The /proc/PID/reclaim is used to reclaim pages in this process. +To reclaim file-backed pages, + > echo 1 > /proc/PID/reclaim + +To reclaim anonymous pages, + > echo 2 > /proc/PID/reclaim + +To reclaim both pages, + > echo 3 > /proc/PID/reclaim + +Also, you can specify address range of process so part of address space +will be reclaimed. The format is following as + > echo 4 addr size > /proc/PID/reclaim + +To reclaim file-backed pages in address range, + > echo 4 $((1<<20) 4096 > /proc/PID/reclaim + +To reclaim anonymous pages in address range, + > echo 5 $((1<<20) 4096 > /proc/PID/reclaim + +To reclaim both pages in address range, + > echo 6 $((1<<20) 4096 > /proc/PID/reclaim + The /proc/pid/pagemap gives the PFN, which can be used to find the pageflags using /proc/kpageflags and number of times a page is mapped using /proc/kpagecount. For detailed explanation, see Documentation/vm/pagemap.txt. -- 1.8.2 -- 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>