Re: [PATCH v2 6/6] add documentation on proc.txt

From: Rob Landley
Date: Wed Apr 24 2013 - 02:49:54 EST

On 04/23/2013 08:41:04 PM, Minchan Kim wrote:
This patch adds stuff about new reclaim field in proc.txt

Cc: Rob Landley <rob@xxxxxxxxxxx>
Signed-off-by: Minchan Kim <minchan@xxxxxxxxxx>

Rob, I didn't add your Acked-by because interface was slight changed.
I hope you give Acke-by after review again.

Documentation/filesystems/proc.txt | 22 ++++++++++++++++++++++
mm/Kconfig | 7 +------
2 files changed, 23 insertions(+), 6 deletions(-)

diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt
index 488c094..1411ad0 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 +490,27 @@ 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.

And size in bytes should be a multiple of page size?

+Below is example which try to reclaim 2 pages from 0x100000.
+To reclaim both pages in address range,
+ > echo $((1<<20) 8192 > /proc/PID/reclaim

Would you like to balance your parentheses?

Acked-by: Rob Landley <rob@xxxxxxxxxxx>

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