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...we can just long term pin user memory here. E.g. for confidential computing cases we can't even ever do DMA straight to userspace. I had that conversation with Meta's block folks who want to do something similar with io_uring and the only option is an an allocator for memory that is known DMAable, e.g. through dma-bufs. You guys really all need to get together and come up with a scheme that actually works instead of piling these hacks over hacks.

At OLS we had a couple of "Xen Mini Summit" sessions. Although there weren''t any formal minutes, here''s a rough summary of what we discussed/concluded. Status as of 24 July 2005 ========================= Summary: We have a couple of annoying bugs, but things are coming together nicely. x86_32p (PAE 16GB) and x86_64 ports are close to being feature complete with

Hi all, this series replaced the DMA_ATTR_NON_CONSISTENT flag to dma_alloc_attrs with a separate new dma_alloc_pages API, which is available on all platforms. In addition to cleaning up the convoluted code path, this ensures that other drivers that have asked for better support for non-coherent DMA to pages with incurring bounce buffering over can finally be properly supported. I'm still a

Hi all, this series replaced the DMA_ATTR_NON_CONSISTENT flag to dma_alloc_attrs with a separate new dma_alloc_pages API, which is available on all platforms. In addition to cleaning up the convoluted code path, this ensures that other drivers that have asked for better support for non-coherent DMA to pages with incurring bounce buffering over can finally be properly supported. As a follow up I