Messages in this thread | | | Date | Thu, 30 Mar 2006 09:13:22 +0200 | From | Ingo Molnar <> | Subject | Re: 2.6.16-rt10 crash on ppc |
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* Nick Piggin <nickpiggin@yahoo.com.au> 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().
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