* Nick Piggin <[email protected]> wrote:
> Yes, that patch is basically what I had in mind.
>
> Is -rt ever allocating memory from really-hard-don't-preempt-me
> context? I guess not, unless the zone->lock is one of those locks too,
> right?
no. zone->lock (and all the slab locks, and all the other MM locks) are
fully preemptible too.
> Should you add a
>
> #else
> BUG_ON(_really_dont_preempt_me());
> #endif
>
> just for safety, or will such misusage get caught elsewhere (eg. when
> attempting to take zone->lock).
it should be caught immediately, by the cond_resched().
Ingo
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