linux-kernel - Re: [PATCH] coredump: wait on the core pattern umh at least once

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Message-ID: <20111031211851.GA5437@neilslaptop.think-freely.org>
Date:	Mon, 31 Oct 2011 17:18:51 -0400
From:	Neil Horman <nhorman@...driver.com>
To:	Scott James Remnant <scott@...split.com>
Cc:	Oleg Nesterov <oleg@...hat.com>, linux-kernel@...r.kernel.org,
	Mandeep Singh Baines <msb@...omium.org>
Subject: Re: [PATCH] coredump: wait on the core pattern umh at least once

On Sat, Oct 29, 2011 at 11:01:44AM -0700, Scott James Remnant wrote:
> On Sat, Oct 29, 2011 at 7:13 AM, Oleg Nesterov <oleg@...hat.com> wrote:
> 
> > On 10/28, Scott James Remnant wrote:
> > >
> > > If a thread crashes as a result of a signal on the thread group leader
> > > that signal can still be pending,
> >
> > No. do_coredump() clears TIF_SIGPENDING.
> >
> I'm definitely seeing cases where SIGTERM sent to the process group
> that chrome is in results in one of chrome's thread's crashing (not
> your concern, obviously), but at the point it enters this function
> TIF_SIGPENDING is definitely set and the signal is SIGTERM.
> 
> The SIGTERM is in the shared pending set.
> 
> > I already tried to explain why this signal_pending() was added, but
> > apparently I was not clear. I'll try again in the previous thread.
> >
> Could you add me to the Cc: of that thread?
> 
> Scott
> 
FWIW, this is the (huge) thread, and specific post that originated the change
we're looking at:
https://lkml.org/lkml/2009/7/2/98
Neil

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