Re: [PATCH 2.6] vm-thrashing-control-tuning

[Hideo AOKI <aoki@sdl.hitachi.co.jp>]

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Andrew Morton wrote:

>>[vm-thrashing-control-tuning.patch  text/plain (3256 bytes)]
> 
> Please send an additional patch to update Documentation/filesystems/proc.txt
> and Documentation/sysctl/vm.txt

Certainly.

Attached patch is a short description for /proc/sys/vm/swap_token_timeout.


Best regards,

Hideo AOKI

Systems Development Laboratory, Hitachi, Ltd.

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 filesystems/proc.txt |    8 ++++++++
 sysctl/vm.txt        |    2 +-
 2 files changed, 9 insertions(+), 1 deletion(-)

Signed-off-by: Hideo Aoki <aoki@sdl.hitachi.co.jp>

diff -uprN linux-2.6.9-rc3-vm-thrashing-control-tuning/Documentation/filesystems/proc.txt linux-2.6.9-rc3-vm-tuning-doc/Documentation/filesystems/proc.txt
--- linux-2.6.9-rc3-vm-thrashing-control-tuning/Documentation/filesystems/proc.txt	2004-10-07 10:47:23.000000000 +0900
+++ linux-2.6.9-rc3-vm-tuning-doc/Documentation/filesystems/proc.txt	2004-10-07 21:31:37.316226768 +0900
@@ -1269,6 +1269,14 @@ 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 -uprN linux-2.6.9-rc3-vm-thrashing-control-tuning/Documentation/sysctl/vm.txt linux-2.6.9-rc3-vm-tuning-doc/Documentation/sysctl/vm.txt
--- linux-2.6.9-rc3-vm-thrashing-control-tuning/Documentation/sysctl/vm.txt	2004-10-07 10:47:53.000000000 +0900
+++ linux-2.6.9-rc3-vm-tuning-doc/Documentation/sysctl/vm.txt	2004-10-07 16:48:56.969591368 +0900
@@ -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