Re: [RFC 0/5] support nonblock submission for splice pipe to pipe

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On 6/8/22 05:19, Hao Xu wrote:
On 6/7/22 17:27, Pavel Begunkov wrote:
On 6/7/22 09:06, Hao Xu wrote:
From: Hao Xu <howeyxu@xxxxxxxxxxx>

splice from pipe to pipe is a trivial case, and we can support nonblock
try for it easily. splice depends on iowq at all which is slow. Let's
build a fast submission path for it by supporting nonblock.

fwiw,

https://www.spinics.net/lists/kernel/msg3652757.html


Thanks, Pavel. Seems it has been discussed for a long time but the
result remains unclear...For me, I think this patch is necessary for getting a good SPLICE_F_NONBLOCK user experience.

I quite agree here, something like this is much needed.
The performance of io_uring pipe I/O is miserably slow

--
Pavel Begunkov



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