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Ugh [LWN.net]
wtarreau · 2026-06-07 · via LWN.net comments

Ugh

Posted Jun 7, 2026 10:55 UTC (Sun) by wtarreau (subscriber, #51152)
In reply to: Ugh by koverstreet
Parent article: Splicing out vmsplice()

In fact even without doing architectural code changes like iouring, we could imagine that sendmsg() could return EINPROGRESS just like connect(), as a way to mean "data are in the process of being sent, we'll wakeup poll once no longer needed". But MSG_ZEROCOPY does almost that, via a receive channel indicating what can be freed.


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