Re: [Fwd: [Fwd: Is sendfile all that sexy? (fwd)]]

[Ingo Molnar]

On Wed, 17 Jan 2001, Rick Jones wrote:

> i'd heard interesting generalities but no specifics. for instance,
> when the send is small, does TCP wait exclusively for the app to
> flush, or is there an "if all else fails" sort of timer running?

yes there is a per-socket timer for this. According to RFC 1122 a TCP
stack 'MUST NOT' buffer app-sent TCP data indefinitely if the PSH bit
cannot be explicitly set by a SEND operation. Was this a trick question?
:-)

        Ingo

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