linux-kernel - Re: [PATCH] proc: revert to show stack information in /proc/{pid}/status

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Message-ID: <1262420776.18097.3.camel@wall-e>
Date:	Sat, 02 Jan 2010 09:26:16 +0100
From:	Stefani Seibold <stefani@...bold.net>
To:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
Cc:	Samuel Thibault <samuel.thibault@...-lyon.org>,
	LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Alexey Dobriyan <adobriyan@...il.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Randy Dunlap <randy.dunlap@...cle.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] proc: revert to show stack information in 
 /proc/{pid}/status

Am Samstag, den 02.01.2010, 14:53 +0900 schrieb KOSAKI Motohiro:
> 2010/1/2 Stefani Seibold <stefani@...bold.net>:
> > Am Freitag, den 01.01.2010, 23:05 +0100 schrieb Samuel Thibault:
> >> Stefani Seibold, le Fri 01 Jan 2010 16:10:16 +0100, a écrit :
> >> > But ps is not a performance critical application nor a cat
> >> > /proc/*/status!
> >>
> >> Errr, maybe not so much as some other operations, but a lot of tools use
> >> them, so it's really worth considering it.
> >
> > Right. And i am still trying to find some optimization. Stay tuned.
> 
> I can understand you feel sad. but don't worry. reverting is very usual event
> on kernel development. You can retry anytime if you make optimized code.

I had analyzed the problem and there is only one solution. Create a new
proc/<pid>/stack_usage entry, which was my first idea. This has absolut
now side effects.

I will write a patch and post it in the next days.

Stefani


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