Re: seastar temporary_buffer/packet and ceph::buffer

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On Tue, Jan 16, 2018 at 4:48 AM, Casey Bodley <cbodley@xxxxxxxxxx> wrote:
>
> On 01/15/2018 02:30 PM, Matt Benjamin wrote:
>>
>> It's the buffer::raw class that abstracts foreign buffer
>> representations now, is it now? A mechanism to allow seastar to
>> single-allocate a composite buffer::raw and temporary_buffer<char>
>> seems possible to imagine.
>>
>> Matt
>
>
> Thanks Matt. I think that's effectively what I did with
> https://github.com/cbodley/ceph/commit/67ae06e488c50a6102c66d34b942ff207493ffd6.
> It allocates a buffer::raw subclass that stores temporary_buffer<char> as a
> member. The raw allocation here is the same one we'd see with any other
> buffer type, so I was mistaken in thinking of this as extra overhead. The
> allocation in the other direction is effectively seastar's version of this
> same abstraction. So I think these conversions are fine as they are.
>
> I do still think there are wins in generalizing denc to avoid these
> conversions, but we'll have to explore whether it's worth the extra
> complexity.

i see. is https://github.com/tchaikov/ceph/tree/wip-seastar-msg
something more close to what you are thinking about?

-- 
Regards
Kefu Chai
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