Date: Mon, 16 May 2011 14:39:30 +0200
From: Jan Kratochvil <jan.kratochvil@redhat.com>
To: Tejun Heo <tj@kernel.org>
Cc: Oleg Nesterov <oleg@redhat.com>, vda.linux@googlemail.com,
        linux-kernel@vger.kernel.org, torvalds@linux-foundation.org,
        akpm@linux-foundation.org, indan@nul.nu
Subject: Re: waitpid(WNOHANG) should report SIGCHLD-notified signals  [Re:
 [PATCH 09/11] job control: reorganize wait_task_stopped()]
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Hi Tejun,

On Mon, 16 May 2011 14:27:56 +0200, Tejun Heo wrote:
> On Mon, May 16, 2011 at 02:11:16PM +0200, Jan Kratochvil wrote:
> > It cannot as various GDB-supported platforms do not support threads properly.
> > And you want to have a common codebase to get it will supported.
> > 
> > Besides that it is a matter of coding style, I perfer "poll() model" even on
> > threads-supporting GNU/Linux.
> 
> The above wouldn't be linux kernel's top design concerns, right?

They are - as without threads one needs reliable WNOHANG - while which you say
it is not reliable.


> It's not like new interface is gonna break that, but I think it's gonna be
> more fragile.  Well, it shouldn't be worse than now.

BTW I really do not think this WNOHANG issue is anyhow related to this whole
discussion.


Thanks,
Jan
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