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    SubjectRe: [RFC] /dev/ioasid uAPI proposal
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    在 2021/6/10 上午10:00, Jason Wang 写道:
    >
    > 在 2021/6/8 下午9:20, Jason Gunthorpe 写道:
    >> On Tue, Jun 08, 2021 at 09:10:42AM +0800, Jason Wang wrote:
    >>
    >>> Well, this sounds like a re-invention of io_uring which has already
    >>> worked
    >>> for multifds.
    >> How so? io_uring is about sending work to the kernel, not getting
    >> structued events back?
    >
    >
    > Actually it can. Userspace can poll multiple fds via preparing
    > multiple sqes with IORING_OP_ADD flag.


    IORING_OP_POLL_ADD actually.

    Thanks


    >
    >
    >>
    >> It is more like one of the perf rings
    >
    >
    > This means another ring and we need introduce ioctl() to add or remove
    > ioasids from the poll. And it still need a kind of fallback like a
    > list if the ring is full.
    >
    > Thanks
    >
    >
    >>
    >> Jason
    >>

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