linux-kernel - Re: [patch] add /proc/pid/stack to dump task's stack trace

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Date:	Fri, 7 Nov 2008 11:20:03 +0300
From:	Alexey Dobriyan <adobriyan@...il.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Ken Chen <kenchen@...gle.com>, linux-kernel@...r.kernel.org,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: [patch] add /proc/pid/stack to dump task's stack trace

On Fri, Nov 07, 2008 at 08:59:25AM +0100, Ingo Molnar wrote:
> 
> * Ingo Molnar <mingo@...e.hu> wrote:
> 
> > > > + * buffer size used for proc read.  See proc_info_read().
> > > > + * 4K page size but our output routines use some slack for overruns
> > > > + */
> > > > +#define PROC_BLOCK_SIZE	(3*1024)
> > 
> > That sounds like a proper limit - the hard limit for this particular 
> > printout function is 4096-170, so we are well within the 
> > PROC_BLOCK_SIZE range.
> 
> ok, i've added Ken's patch to tip/core/stacktrace and started testing 
> it.
> 
> Alexey, i've added your Acked-by because you appeared to like the 
> patch - let me know if i should remove it.

Of course, I don't like it!

Switch to seqfiles, add entry in TID table as well.

The idea is good, though.
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