On Thu, 1 Nov 2012, Luigi Semenzato wrote:

So which one should I try first, David's change or Mel's?

Does Mel's change take into account the fact that the exiting process
is already deep into do_exit() (exit_mm() to be precise) when it tries
to allocate?

Mel's patch is addressing a separate issue since you've already proven 
that your problem is calling the oom killer which wouldn't occur if your 
thread had SIGKILL prior to Mel's patch.  It would allow my suggested 
workaround of killing the hung task to end the livelock, though, but that 
shouldn't be needed after my patch.

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