Re: Gigabit Linux Server Bottlenecks

[Jes Sorensen]

>>>>> "Zachary" == Zachary Amsden <[EMAIL PROTECTED]> writes:

Zachary> Yes, this works fine for UDP, but you can't do TCP this way
Zachary> without COW VM support for scatter skbufs, because TCP needs
Zachary> to buffer data until it has been acknowledged.  Even then,
Zachary> you need the application to behave properly and not touch
Zachary> anything in the same page as the output data until an ACK is
Zachary> received.  This is easy enough to hack into high bandwidth
Zachary> servers, like ftp or rcp, and that is mostly the only place
Zachary> you will need it.

Well there is still one simple case where this makes a lot of sense,
think sendfile(). I'd love to see the COW added as well so we can
utilize this for regular write() but sendfile() is a good first
step.

Jes

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