Messages in this thread | | | Date | Tue, 04 Mar 2008 13:27:56 -0800 | From | Jeremy Fitzhardinge <> | Subject | Re: preempt bug in set_pmd_pfn? |
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Ingo Molnar wrote: > * Jeremy Fitzhardinge <jeremy@goop.org> wrote: > > >> I think set_pmd_pfn, which is only called by __set_fixmap, might have >> a preempt bug in it. >> > > yes, and we had similar preemption bugs in the past. I guess most places > are either infrequent or have some natural atomicity anyway. Wanna send > a patch? >
Sure. Should it just disable preemption, or take a lock? It calls set_pte_at without holding any pte locks; that seems to be relatively common. Is it OK when you're operating on init_mm?
J
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