Re: Will __pa(vmalloc()) ever work?

[Timur Tabi]

Christoph Hellwig wrote:

> It will return the correct physical address for the start of the buffer.
> But given that vmalloc is a non-contingous allocator that's pretty useless.

So as long as the vmalloc'd memory fits inside one page, __pa() will always give the 
correct address?  If so, then can't I just call __pa() for every page in the buffer and 
get a list of physical addresses?  If I can do that, then how the memory be virtually 
contiguous but not physicall contiguous?

> As are physical addresses for anything but low-level architecture code.

I don't understand what that means.

--
Timur Tabi
Staff Software Engineer
timur.tabi@xxxxxxxxxxx

One thing a Southern boy will never say is,
"I don't think duct tape will fix it."
     -- Ed Smylie, NASA engineer for Apollo 13
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