> > @@ -291,9 +309,10 @@ static struct task_struct *select_bad_process(unsigned long *ppoints,
> > * Otherwise we could get an easy OOM deadlock.
> > */
> > if (p->flags & PF_EXITING) {
> > - if (p != current)
> > + if (p != current) {
> > + boost_dying_task_prio(p, mem);
> > return ERR_PTR(-1UL);
> > -
> > + }
> > chosen = p;
> > *ppoints = ULONG_MAX;
> > }
>
> This has the potential to actually make it harder to free memory if p is
> waiting to acquire a writelock on mm->mmap_sem in the exit path while the
> thread holding mm->mmap_sem is trying to run.
if p is waiting, changing prio have no effect. It continue tol wait to release mmap_sem.
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