Messages in this thread | | | Subject | Re: Areca RAID driver remaining items? | From | Arjan van de Ven <> | Date | Thu, 23 Feb 2006 13:07:32 +0100 |
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On Thu, 2006-02-23 at 19:51 +0800, erich wrote: > If Linux can not assurent the contingous memory space allocating of > "dma_alloc_coherent" .
coherent memory is guaranteed to be in the "lower" 32 bit of memory! So that is good news, I think you are just fine.
[Exception is that you can say that you are ok with a bigger mask for this type of memory, but just don't do that if you're not]
> When arcmsr get a physical ccb address from areca's firmware. > Does linux has any functions for converting of "bus to virtual" ?
not without using pools. You would have to search the list of memory you gave it to find that out.
(USB has a similar problem, afaik they solved it with pools)
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