linux-kernel - Re: [PATCH]: proc: export a processes resource limits via proc/<pid>

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Date:	Tue, 21 Aug 2007 11:56:11 -0700
From:	Andy Isaacson <adi@...apodia.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Neil Horman <nhorman@...driver.com>, Valdis.Kletnieks@...edu,
	linux-kernel@...r.kernel.org, torvalds@...ux-foundation.org
Subject: Re: [PATCH]: proc: export a processes resource limits via proc/<pid>

On Fri, Aug 17, 2007 at 12:45:47PM -0700, Andrew Morton wrote:
> On Fri, 17 Aug 2007 06:59:18 -0400
> Neil Horman <nhorman@...driver.com> wrote:
> > Currently, there exists no method for a process to query the resource
> > limits of another process.  They can be inferred via some mechanisms
> > but they cannot be explicitly determined.  Given that this
> > information can be usefull to know during the debugging of an
> > application, I've written this patch which exports all of a
> > processes limits via /proc/<pid>/limits.
> 
> I'm struggling with this a bit.  Sure, it _might_ be handy on some
> occasions to be able to get at this information.  But I've never seen
> anyone ask for it before, and it _is_ determinable by other means, if only
> strace.

I've wanted this information on multiple occasions in the past and was
mystified that there was no way to determine it.  And no, I don't feel
that strace is an answer -- given a running process, how do I use strace
to find out what its current ulimits are?

-andy
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