On Wed, 2005-04-06 at 15:26, Catalin Marinas wrote: > Bas Vermeulen <[EMAIL PROTECTED]> wrote: > > I am currently working on the bfinnommu linux port for the BlackFin 533. > > I need to grab the top 1 MB of memory so I can give it out to drivers > > that need non-cached memory for DMA operations. > > I did this long time ago (on a 2.4 kernel), trying to avoid a hardware > problem. I re-ordered the zones so that ZONE_DMA came after > ZONE_NORMAL. Since the DMA memory was quite small (less than 1MB), I > also put a "break" before "case ZONE_DMA" in the > build_zonelists_node() functions to avoid the allocation fallback.
This will put me in the zone of 'it ain't ever going to be integrated'. I'd preferrably find a solution without changing the zones. My ideal solution would be grabbing pages before they are assigned to a zone, or at least for the zone to recognize them as used. Bas Vermeulen - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
