sendfile(2) SF_NOPUSH flag proposal

[Igor Sysoev]

On Wed, 28 May 2003, Terry Lambert wrote:

> Igor Sysoev wrote:
> > > will result in you sleeping with PRUS_MORETOCOME set, but with
> > > no more being sent because the send buffer doesn't get emptied,
> > > as it's waiting for more data to send.
> > 
> > But as I understand PRUS_MORETOCOME is not set if socket is non-blocking.
> 
> Then the bug is still not fixed by setting it, since your total
> send size might be less than `sysctl net.inet.tcp.sendspace`.

Why ? We can reset TF_MORETOCOME if the sending is completed.

> You guys should really just have a buffer finalize function
> that gets called on block/return cases, and impute the flags
> you need on the socket while it's being used for sendfile.


Igor Sysoev
http://sysoev.ru/en/