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SubjectRe: pci_pool reap?
On Tue, Feb 12, 2002 at 04:36:34PM +0100, Daniel Stodden wrote:
> ARM does GFP_KERNEL, and then __ioremaps the underlying pages.
> ugh. is that the only way to get the area coherent?

Yes. Cache bits are in the page tables, and it would be idiotic to
manipulate the cache bits on a 1MB granularity over the kernel
direct mapped space.

> furthermore i don't see why this could not be interrupt safe.

GFP_KERNEL in the page table allocation functions mainly. We've been
around and around this recently on this mailing list, so I'm not going
to say anything further. I don't want another long discussion about
this subject taking my time away from doing real work on ARM. If you're
really interested in the outcome, please examine the lkml archives.

Russell King ( The developer of ARM Linux

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