Messages in this thread | | | Date | Thu, 13 Jan 2000 18:12:45 +0100 (CET) | From | Andrea Arcangeli <> | Subject | Re: [RFC] 2.3.39 zone balancing |
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On Wed, 12 Jan 2000, Kanoj Sarcar wrote:
>+There are two reasons to be requesting non __GFP_WAIT allocations: >+the caller can not sleep (typically intr context), or does not want >+to incur cost overheads of page stealing and possible swap io.
You may be in a place where you can sleep but you can't do I/O to avoid deadlocking and so you shouldn't use __GFP_IO and nothing more (it has nothing to do with __GFP_WAIT).
But if it can sleep and there aren't deadlock conditons going on and it doesn't use __GFP_WAIT, it means it's buggy and has to be fixed.
I have not read the rest and the patch yet (I'll continue ASAP).
Andrea
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