Messages in this thread |  | | Date | Tue, 12 Nov 1996 23:40:39 +0000 (GMT) | From | Gerard Roudier <> | Subject | Re: Module loading (2.0.24) fails with "Unable to allocate DMA memory" |
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On Mon, 11 Nov 1996, Alan Cox wrote:
> > In preceeding versions of 2.0 I had the same problem with ppp and > > cdrom, rare and not reproducible. Another person menions the problem > > PPP doesnt use DMA memory , so PPP isnt going to be subject to that. The PPP > problems would have to have been something totally different.
PPP probably does some (too much ??) GFP_ATOMIC allocations that may fail, and probably is not able to recover from those failures.
I noticed that modules do GFP_ATOMIC allocations at initialisation (load). Is it a constraint under Linux or could they use some cooler allocation priorities? (or is it just untrue?)
Why, when I switch some benchmark from a 1K fs to a 4K fs, the process doing IOs eats about 100% CPU for about 1 IO every 2 seconds, during about 20 seconds?
OK. That is not a normal case and fortunately Linux behaviour is OK in normal situations. In my opinion, that shows that memory stress may often happen under Linux.
> Alan
Gerard.
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