linux-kernel - [PATCH] making /proc/<pid>/limits writable

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Message-Id: <200807302157.46261.ajohansson@suse.de>
Date:	Wed, 30 Jul 2008 21:57:45 +0200
From:	Anders Johansson <ajohansson@...e.de>
To:	linux-kernel@...r.kernel.org
Subject: [PATCH] making /proc/<pid>/limits writable

(For any replies, please cc. me, because I'm not subscribed)

Attached is a patch making the limits for a process writable, so it is 
possible to change the limits of a task other than current.

There are many reasons why this is desirable. The core limit is to me the most 
important. If a process hangs, because of some sort of race condition that 
happens once in a blue moon, and ulimit -c is set to 0, it might take forever 
to reproduce. It would be nice to be able to change that limit dynamically, to 
be able to get a core dump.

Other limits should also be settable, but for now I've only done core size.

The patch is against 2.6.27-rc1

btw, in case it isn't painfully obvious: this is my very first kernel patch 
that isn't a simple one-or-two-line bug fix

Anders

View attachment "pid_limits.diff" of type "text/x-patch" (3601 bytes)