linux-kernel - Re: [PATCH respin, was PATCH for review] During VM oom condition, kill all threads in process group

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Date:	Tue, 24 Jul 2007 09:28:44 -0500
From:	Will Schmidt <will_schmidt@...t.ibm.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Christoph Hellwig <hch@...radead.org>, Andi Kleen <ak@...e.de>,
	linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org
Subject: Re: [PATCH respin, was PATCH for review] During VM oom condition,
	kill all threads in process group

On Mon, 2007-07-23 at 14:16 -0700, Andrew Morton wrote:
> On Mon, 23 Jul 2007 13:09:45 -0500
> Will Schmidt <will_schmidt@...t.ibm.com> wrote:
> 
> > During VM oom condition, kill all threads in process group.
> > 
> > We have had complaints where a threaded application is left in a bad
> > state after one of it's threads is killed when we hit a VM: out_of_memory
> > condition.
> > Killing just one of the process threads can leave the application in a
> > bad state, whereas killing the entire process group would allow for
> > the application to restart, or be otherwise handled, and makes it very
> > obvious that something has gone wrong.
> > 
> > This change allows the entire process group to be taken down, rather
> > than just the one thread.
> 
> Just checking...
> 
> blackfin
> h8300
> m68knommu
> uml
> v850
> 
> were not changed.  Intentional?

Yes.  Those arch's don't have the VM oom code that I could see.   There
is an occasional do_exit() reference elsewhere in the fault handler
code, for reasons other than VM oom, so I deliberately didn't touch
those either.    



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