[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [RFC PATCH] page_alloc: use first half of higher order chunks when halving
On 26/03/14 10:17, Matt Wilson wrote: > > Konrad, what's the possibility of fixing this in Linux Xen PV setup > code? I think it'd be a matter batching up pages and doing larger > order allocations in linux/arch/x86/xen/setup.c:xen_do_chunk(), > falling back to smaller pages if allocations fail due to > fragmentation, etc. We plan to fix problems caused by non-machine-contiguous memory by setting up the IOMMU to have 1:1 bus to pseudo-physical mappings. This would avoid using the swiotlb always[1], regardless of the machine layout of dom0 or the driver domain. I think I would prefer this approach rather than making xen/setup.c even more horribly complicated. Malcolm has a working prototype of this already. David [1] Unless you have a non-64 bit DMA capable device, but we don't care about performance with these. _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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