Messages in this thread | | | Subject | Re: [PATCH v8 00/10] Introduce VDUSE - vDPA Device in Userspace | From | Jason Wang <> | Date | Tue, 29 Jun 2021 12:12:57 +0800 |
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在 2021/6/28 下午6:32, Yongji Xie 写道: >> The large barrier is bounce-buffer mapping: SPDK requires hugepages >> for NVMe over PCIe and RDMA, so take some preallcoated hugepages to >> map as bounce buffer is necessary. Or it's hard to avoid an extra >> memcpy from bounce-buffer to hugepage. >> If you can add an option to map hugepages as bounce-buffer, >> then SPDK could also be a potential user of vduse. >> > I think we can support registering user space memory for bounce-buffer > use like XDP does. But this needs to pin the pages, so I didn't > consider it in this initial version. >
Note that userspace should be unaware of the existence of the bounce buffer.
So we need to think carefully of mmap() vs umem registering.
Thanks
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