Subject: Re: [PATCH 2/3] [PATCH powerpc] during VM oom condition, kill all
	threads in process group
From: Will Schmidt <will_schmidt@vnet.ibm.com>
Reply-To: will_schmidt@vnet.ibm.com
To: linux-kernel@vger.kernel.org
Cc: anton@samba.org, linuxppc-dev@ozlabs.org
In-Reply-To: <20070605174838.21740.55720.stgit@farscape.rchland.ibm.com>
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	 <20070605174838.21740.55720.stgit@farscape.rchland.ibm.com>
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Date: Tue, 05 Jun 2007 13:17:14 -0500
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Whoops..  sorry about any reply bounces, I flubbed the cc to
linuxppc-dev@ozlabs.org . 

-Will

On Tue, 2007-05-06 at 12:48 -0500, Will Schmidt wrote:
> When we get into a state where VM has ran out of memory, and it's time to
> thwack a process, we should take out the entire process group, rather than
> just one thread.
> 
> Tested on POWER5.
> 
> Signed-off-by: Will Schmidt <will_schmidt@vnet.ibm.com>
> ---
> 
>  arch/powerpc/mm/fault.c |    4 +++-
>  1 files changed, 3 insertions(+), 1 deletions(-)
> 
> diff --git a/arch/powerpc/mm/fault.c b/arch/powerpc/mm/fault.c
> index 03aeb3a..9afe871 100644
> --- a/arch/powerpc/mm/fault.c
> +++ b/arch/powerpc/mm/fault.c
> @@ -392,8 +392,10 @@ out_of_memory:
>  		goto survive;
>  	}
>  	printk("VM: killing process %s\n", current->comm);
> -	if (user_mode(regs))
> +	if (user_mode(regs)) {
> +		zap_other_threads(current);
>  		do_exit(SIGKILL);
> +	}
>  	return SIGKILL;
>  
>  do_sigbus:
> 
> 

-
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