linux-kernel - Re: [PATCH] binfmt_elf: core dump masking support

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Date:	Sun, 14 Jan 2007 21:01:57 +0100
From:	Pavel Machek <pavel@....cz>
To:	"Kawai, Hidehiro" <hidehiro.kawai.ez@...achi.com>
Cc:	Andrew Morton <akpm@...l.org>, linux-kernel@...r.kernel.org,
	gregkh@...e.de, james.bottomley@...eleye.com,
	Satoshi OSHIMA <soshima@...hat.com>,
	"Hideo AOKI@...hat" <haoki@...hat.com>,
	sugita <yumiko.sugita.yf@...achi.com>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Alan Cox <alan@...rguk.ukuu.org.uk>
Subject: Re: [PATCH] binfmt_elf: core dump masking support

Hi!

> > Well, you can have it as set of 0-1 "limits"...
> 
> I have come up with a similar idea of regarding the ulimit
> value as a bitmask, and I think it may work.
> But it will be confusable for users to add the new concept of
> 0-1 limitation into the traditional resouce limitation feature.
> Additionaly, this approach needs a modification of each shell
> command.
> What do you think about these demerits?

> The /proc/<pid>/ approach doesn't have these demerits, and it
> has an advantage that users can change the bitmask of any process
> at anytime.

Well... not sure if it is advantage. Semantics of ulimit inheritance
are well given, for example. How is this going to be inherited?

Anyway, yes, I see 0/1 "limits" have bad sides, too, so...
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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