On Tue, 30 Oct 2012, Luigi Semenzato wrote:
> For completeness, I would like to report that the page fault in
> mm_release looks legitimate. The fault happens near here:
>
> if (unlikely(tsk->robust_list)) {
> exit_robust_list(tsk);
> tsk->robust_list = NULL;
> }
>
> and robust_list is a userspace structure.
>
This is the only place where the hang occurs when there are several
threads in the exit path with PF_EXITING and it causes the oom killer to
defer killing a process? If that's the case, then a simple
tsk->robust_list check would be sufficient to avoid deferring incorrectly.
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@xxxxxxxxx. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>