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From: Linus Torvalds <torvalds@linux-foundation.org>
To: Roland McGrath <roland@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] show_task: real_parent
Date: Wed, 9 Jan 2008 08:03:51 -0800 (PST)	[thread overview]
Message-ID: <alpine.LFD.1.00.0801090800360.3148@woody.linux-foundation.org> (raw)
In-Reply-To: <20080109080323.8FCDC26F9A7@magilla.localdomain>



On Wed, 9 Jan 2008, Roland McGrath wrote:
> 
> The show_task function invoked by sysrq-t et al displays the
> pid and parent's pid of each task.  It seems more useful to
> show the actual process hierarchy here than who is using
> ptrace on each process.

Hmm. It could go both ways. If the problem is some ptrace()/wait4() 
interaction issue (which is certainly not unheard of!) the parent that 
matters for the kernel may be the right thing to print out.

I wonder if we should just print out both (or perhaps print out the 
ptrace parent only if it differs from the normal parent?)

I'll apply this, because I agree that it's sensible in general, I just 
wonder how often anybody really even cares about the parent information 
when it's not about some wait-related issue..

		Linus

  parent reply	other threads:[~2008-01-09 16:05 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-01-09  8:03 [PATCH] show_task: real_parent Roland McGrath
2008-01-09  9:16 ` Ingo Molnar
2008-01-09 16:03 ` Linus Torvalds [this message]
2008-01-09 20:15   ` Roland McGrath

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