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* David Mosberger <davidm@napali.hpl.hp.com> wrote: > Now, Ingo says that the order is reversed with his patch, i.e., > switch_mm() happens after switch_to(). That means flush_tlb_mm() may > now see a current->active_mm which hasn't really been activated yet. > That should be OK since it would just mean that we'd do an early (and > duplicate) activate_context(). While it does not give me a warm and > fuzzy feeling to have this inconsistent state be observable by > interrupt-handlers (and, in particular, IPI-handlers), I don't see any > problem with it off hand. thanks for the analysis. I fundamentally dont have any fuzzy feeling from having _any_ portion of the context-switch path nonatomic, but with more complex hardware it's just not possible it seems. Ingo - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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