Re: [PATCH 02/11] oom: oom_kill_process() doesn't select kthreadchild

[Minchan Kim]

On Thu, Jul 01, 2010 at 09:07:02AM +0900, KOSAKI Motohiro wrote:
> > On Wed, Jun 30, 2010 at 06:27:52PM +0900, KOSAKI Motohiro wrote:
> > > Now, select_bad_process() have PF_KTHREAD check, but oom_kill_process
> > > doesn't. It mean oom_kill_process() may choose wrong task, especially,
> > > when the child are using use_mm().
> > 
> > Is it possible child is kthread even though parent isn't kthread?
> 
> Usually unhappen. but crappy driver can do any strange thing freely.
> As I said, oom code should have conservative assumption as far as possible.

Okay. You change the check with oom_unkillable_task at last. 
The oom_unkillable_task is generic function so that the kthread check in
oom_kill_process is tivial, I think. 

Reviewed-by: Minchan Kim <minchan.kim@xxxxxxxxx>


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-- 
Kind regards,
Minchan Kim
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