Messages in this thread | | | Date | Thu, 21 Nov 2019 11:20:20 -0500 (EST) | From | Alan Stern <> | Subject | Re: possible deadlock in mon_bin_vma_fault |
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On Thu, 21 Nov 2019, Pete Zaitcev wrote:
> Anyway... If you are looking at it too, what do you think about not using > any locks in mon_bin_vma_fault() at all? Isn't it valid? I think I tried > to be "safe", but it only uses things that are constants unless we're > opening and closing; a process cannot make page faults unless it has > some thing mapped; and that is only possible if device is open and stays > open. Can you find a hole in this reasoning?
I think you're right. But one thing concerns me: What happens if the same buffer is mapped by more than one process? Do you allow that? I haven't read the code in enough detail to see.
Alan Stern
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