This patch adds stuff about new reclaim field in proc.txt

Acked-by: Rob Landley <>
Signed-off-by: Minchan Kim <>
 Documentation/filesystems/proc.txt | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/Documentation/filesystems/proc.txt 
index 488c094..ee4cef1 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 +490,25 @@ To clear the soft-dirty bit
 Any other value written to /proc/PID/clear_refs will have no effect.
+The file /proc/PID/reclaim is used to reclaim pages in this process.
+To reclaim file-backed pages,
+    > echo file > /proc/PID/reclaim
+To reclaim anonymous pages,
+    > echo anon > /proc/PID/reclaim
+To reclaim all pages,
+    > echo all > /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 addr size-byte > /proc/PID/reclaim
+NOTE: addr should be page-aligned.
+Below is example which try to reclaim 2M from 0x100000.
+    > echo 0x100000 2M > /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.

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

Reply via email to