Re: [PATCH v2 1/8] io_uring/uring_cmd: add io_uring_cmd_import_fixed_full()

[Pavel Begunkov <asml.silence@gmail.com>]

On 10/27/25 22:28, Joanne Koong wrote:
> Add an API for fetching the registered buffer associated with a
> io_uring cmd. This is useful for callers who need access to the buffer
> but do not have prior knowledge of the buffer's user address or length.

Joanne, is it needed because you don't want to pass {offset,size}
via fuse uapi? It's often more convenient to allocate and register
one large buffer and let requests to use subchunks. Shouldn't be
different for performance, but e.g. if you try to overlay it onto
huge pages it'll be severely overaccounted.

-- 
Pavel Begunkov