linux-kernel - Re: [PATCH] proc: fix ->stack

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Date:	Sun, 01 Nov 2009 16:06:46 +0100
From:	Stefani Seibold <stefani@...bold.net>
To:	Alexey Dobriyan <adobriyan@...il.com>
Cc:	akpm@...ux-foundation.org, m.s.tsirkin@...il.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] proc: fix ->stack_start in compat mode

Am Sonntag, den 01.11.2009, 15:43 +0300 schrieb Alexey Dobriyan:
> > >  Stefani, I get "Stack usage: 0 kB", you may want to look at it.
> > > 
> > 
> > Under which circumstance do you get 0 kb reported? What is your system
> > (mmu/nommu, 32bit/64bit, architecture and so on).
> 
> Well, no wonder it doesn't work:
> 
> 	#define KSTK_ESP(tsk)           -1 /* sorry. doesn't work for syscall. */
> 
> How does it supposed to work on live task?

Okay, you are right. That's really strange. I just build a 64 bit kernel
i will try to fix this odd behavior. This is a break in the kernel API.
KSTP_ESP should return the value of the kernel stack and not a -1. Sh..


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