Messages in this thread | | | Date | Tue, 17 Jun 2008 11:06:55 +0200 | From | Maxim Shchetynin <> | Subject | Re: AZFS file system proposal |
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> >+config AZ_FS > >+ tristate "AZFS filesystem support" > > This is slightly redundant, it should probably be > tristate "AZ filesystem support"
I have called it the same way as other file systems (in Kconfig they say "JFS filesystem support", "XFS filesystem support", "NTFS file system support", ...)
> >+ help > >+ azfs is a file system for I/O attached memory backing. It requires > >+ a block device with direct_access capability, e.g. axonram. > > (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.
> >+ 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. I would say you can either mmap it or place a file system on it.
-- Mit freundlichen Grüßen / met vriendelijke groeten / avec regards
Maxim V. Shchetynin Linux Kernel Entwicklung IBM Deutschland Entwicklung GmbH Linux für Cell, Abteilung 3250 Schönaicher Straße 220 71032 Böblingen
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