| Date | Fri, 12 Oct 2018 18:04:56 +0100 | From | Catalin Marinas <> | Subject | Re: [PATCH 08/10] swiotlb: don't dip into swiotlb pool for coherent allocations |
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On Mon, Oct 08, 2018 at 10:02:44AM +0200, Christoph Hellwig wrote: > All architectures that support swiotlb also have a zone that backs up > these less than full addressing allocations (usually ZONE_DMA32). > > Because of that it is rather pointless to fall back to the global swiotlb > buffer if the normal dma direct allocation failed - the only thing this > will do is to eat up bounce buffers that would be more useful to serve > streaming mappings. > > Signed-off-by: Christoph Hellwig <hch@lst.de> > --- > arch/arm64/mm/dma-mapping.c | 6 +-- > include/linux/swiotlb.h | 5 -- > kernel/dma/swiotlb.c | 105 +----------------------------------- > 3 files changed, 5 insertions(+), 111 deletions(-)
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
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