mingo@chiara.csoma.elte.hu said:

On Thu, 12 Feb 1998, Alan Cox wrote:

quoted

On the intel its a huge win to map PCI frame buffers using 4Mbyte pages, but
the kernel mmap really can't hack the idea right now. A pity cos if you
hack it in and make sure you never unmap it you get 2-3% better X 
performance

i tried to hack this half a year ago, but had to find out that 4MB pages
are only valid for kernel mappings, which means we'd have to make X a ring
0 process too ...

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alan@lxorguk.ukuu.org.uk said:

 The way its done is ok normally. I guess you need to make X over
Linux/RT call the rtlinux kernel to handle it. Note X _has_ to do
those global cli/sti's to meet hardware needs

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GGI (well, KGI) should be able to fix both of these, shouldn't it?




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