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    SubjectRe: [PATCH v3 4/4] io_uring: add support for zone-append
    On Fri, Jul 10, 2020 at 6:39 PM Christoph Hellwig <hch@infradead.org> wrote:
    >
    > On Thu, Jul 09, 2020 at 12:50:27PM -0600, Jens Axboe wrote:
    > > It might, if you have IRQ context for the completion. task_work isn't
    > > expensive, however. It's not like a thread offload.
    > >
    > > > Using flags have not been liked here, but given the upheaval involved so
    > > > far I have begun to feel - it was keeping things simple. Should it be
    > > > reconsidered?
    > >
    > > It's definitely worth considering, especially since we can use cflags
    > > like Pavel suggested upfront and not need any extra storage. But it
    > > brings us back to the 32-bit vs 64-bit discussion, and then using blocks
    > > instead of bytes. Which isn't exactly super pretty.
    >
    > block doesn't work for the case of writes to files that don't have
    > to be aligned in any way. And that I think is the more broadly
    > applicable use case than zone append on block devices.

    But when can it happen that we do zone-append on a file (zonefs I
    asssume), and device returns a location (write-pointer essentially)
    which is not in multiple of 512b?


    --
    Joshi

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