linux-kernel - Re: [PATCH 1/3] [PATCH i386] during VM oom condition, kill all threads in process group

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Message-Id: <20070607171018.d51fc5da.akpm@linux-foundation.org>
Date:	Thu, 7 Jun 2007 17:10:18 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Anton Blanchard <anton@...ba.org>
Cc:	Will Schmidt <will_schmidt@...t.ibm.com>,
	linux-kernel@...r.kernel.org, liuxppc-dev@...abs.org
Subject: Re: [PATCH 1/3] [PATCH i386] during VM oom condition, kill all
 threads in process group

On Thu, 7 Jun 2007 18:16:21 -0500
Anton Blanchard <anton@...ba.org> wrote:

>  
> Hi,
> 
> > zap_other_threads() requires tasklist_lock.
> > 
> > If we're going to do this then we should probably create some new function
> > (with a better name) which takes tasklsit_lock and then calls
> > zap_other_threads().
> > 
> > Does this patch fix any observed-in-the-real-world problem?  If so, please
> > describe it.
> 
> Yeah we have had complaints where threaded apps have only one thread
> shot down instead of the entire process. This leaves the application in
> a bad state, whereas if it had been killed cleanly the application could
> have restarted.
> 
> My understanding is that fatal signals should kill all threads in the
> group.
> 

OK, well could we please get all that info appropriatelt captured in #2's
changelog?

Other architectures will probably need to implement this.
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