Messages in this thread | | | Date | Thu, 22 Feb 2001 18:01:03 -0600 | From | Philipp Rumpf <> | Subject | Re: Linux 2.4.1-ac15 |
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On Thu, Feb 22, 2001 at 10:22:56AM +0000, Alan Cox wrote: > > > We can take page faults in interrupt handlers in 2.4 so I had to use a > > > spinlock, but that sounds the same > > > > We can? Woah, please explain. > > vmalloc does a lazy load of the tlb. That can lead to the exception table > being walked on an IRQ
But will that ever get to the search_exception_table code ? (I don't think that would be valid, but other exceptions in interrupts might be - cf some of the self-modifying mmx copy versions).
Oh, like rdmsr_eio on SMP systems. Definitely valid, and it can deadlock with both the semaphore and the spinlock AFAICS. Alan, is this an issue ? - 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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