Messages in this thread | | | Subject | Re: uncached page allocator | From | Peter Zijlstra <> | Date | Tue, 21 Aug 2007 16:56:05 +0200 |
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On Tue, 2007-08-21 at 16:05 +1000, Dave Airlie wrote:
> So you can see why some sort of uncached+writecombined page cache > would be useful, I could just allocate a bunch of pages at startup as > uncached+writecombined, and allocate pixmaps from them and when I > bind/free the pixmap I don't need the flush at all, now I'd really > like this to be part of the VM so that under memory pressure it can > just take the pages I've got in my cache back and after flushing turn > them back into cached pages, the other option is for the DRM to do > this on its own and penalise the whole system.
Can't you make these pages part of the regular VM by sticking them all into an address_space.
And for this reclaim behaviour you'd only need to set PG_private and have a_ops->releasepage() dtrt.
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