Messages in this thread | | | Date | Tue, 17 Jun 2008 11:35:10 +0200 (CEST) | From | Jan Engelhardt <> | Subject | Re: AZFS file system proposal |
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On Tuesday 2008-06-17 11:06, Maxim Shchetynin wrote: > >> (a) What is axonram? >> (b) why is axonram direct_access, and my other devices (including >> standard PC RAM) not? > >[Axonram is a module specific for IBM CellBlade and allows access to >a DDR2 memory attached onto Axon controller.] You don't need >direct_access and not azfs for main memory because there is already >a pretty nice tmpfs for it.
So the reason azfs could be useful is...?
>> >+ Mounting such device with azfs gives memory mapped >> >access to the + underlying memory to user space. >> >> Can't I just mmap(/dev/theblockdevice), why would I need to go through >> azfs? > >Yes, you can mmap it. But what does it have to do with a file system.
Exactly, that's what I was asking myself.
>I would say you can either mmap it or place a file system on it.
The help text implies that I *need* azfs to mmap it - and that sounds like a Rube Goldberg machine.
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