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H A D | dma-iommu.c | 4604393c Thu Sep 03 06:34:04 CDT 2020 Robin Murphy <robin.murphy@arm.com> iommu/dma: Remove broken huge page handling
The attempt to handle huge page allocations was originally added since the comments around stripping __GFP_COMP in other implementations were nonsensical, and we naively assumed that split_huge_page() could simply be called equivalently to split_page(). It turns out that this doesn't actually work correctly, so just get rid of it - there's little point going to the effort of allocating huge pages if we're only going to split them anyway.
Reported-by: Roman Gushchin <guro@fb.com> Signed-off-by: Robin Murphy <robin.murphy@arm.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/e287dbe69aa0933abafd97c80631940fd188ddd1.1599132844.git.robin.murphy@arm.com Signed-off-by: Joerg Roedel <jroedel@suse.de> 4604393c Thu Sep 03 06:34:04 CDT 2020 Robin Murphy <robin.murphy@arm.com> iommu/dma: Remove broken huge page handling The attempt to handle huge page allocations was originally added since the comments around stripping __GFP_COMP in other implementations were nonsensical, and we naively assumed that split_huge_page() could simply be called equivalently to split_page(). It turns out that this doesn't actually work correctly, so just get rid of it - there's little point going to the effort of allocating huge pages if we're only going to split them anyway. Reported-by: Roman Gushchin <guro@fb.com> Signed-off-by: Robin Murphy <robin.murphy@arm.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/e287dbe69aa0933abafd97c80631940fd188ddd1.1599132844.git.robin.murphy@arm.com Signed-off-by: Joerg Roedel <jroedel@suse.de>
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