linux-kernel - Re: [PATCH] oom_adj/oom

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Message-ID: <20060801153712.GA2259@99RXZYP.ibm.com>
Date:	Tue, 1 Aug 2006 17:37:12 +0200
From:	Jan-Frode Myklebust <mykleb@...ibm.com>
To:	Andrew Morton <akpm@...l.org>
Cc:	linux-kernel@...r.kernel.org, Alan Cox <alan@...rguk.ukuu.org.uk>
Subject: Re: [PATCH] oom_adj/oom_score documentation

Got some spelling/language advice from Alan Cox (thanks!), so here's 
an updated patch. Hope it reads better now.


Signed-off-by: Jan-Frode Myklebust <mykleb@...ibm.com>
 
---

diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt
index 99902ae..172098a 100644
--- a/Documentation/filesystems/proc.txt
+++ b/Documentation/filesystems/proc.txt
@@ -39,6 +39,8 @@ Table of Contents
   2.9	Appletalk
   2.10	IPX
   2.11	/proc/sys/fs/mqueue - POSIX message queues filesystem
+  2.12	/proc/<pid>/oom_adj - Adjust the oom-killer score
+  2.13	/proc/<pid>/oom_score - Display current oom-killer score
 
 ------------------------------------------------------------------------------
 Preface
@@ -1958,6 +1960,22 @@ a queue must be less or equal then msg_m
 maximum  message size value (it is every  message queue's attribute set during
 its creation).
 
+2.12 /proc/<pid>/oom_adj - Adjust the oom-killer score
+------------------------------------------------------
+
+This file can be used to adjust the score used to select which processes 
+should be killed in an  out-of-memory  situation.  Giving it a high score will 
+increase the likelihood of this process being killed by the oom-killer.  Valid
+values are in the range -16 to +15, plus the special value -17, which disables
+oom-killing altogether for this process.
+
+2.13 /proc/<pid>/oom_score - Display current oom-killer score
+-------------------------------------------------------------
+
+------------------------------------------------------------------------------
+This file can be used to check the current score used by the oom-killer is for
+any given <pid>. Use it together with /proc/<pid>/oom_adj to tune which
+process should be killed in an out-of-memory situation.
 
 ------------------------------------------------------------------------------
 Summary
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