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 (rmk@arm.linux.org.uk) The developer of ARM Linux
http://www.arm.linux.org.uk/personal/aboutme.html
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This archive was generated by hypermail 2b29 : Fri Feb 15 2002 - 21:00:50 EST