Re: Early SPECWeb99 results on 2.5.33 with TSO on e1000

From: Jeff Garzik (
Date: Mon Sep 16 2002 - 18:08:15 EST

David Woodhouse wrote:
> said:
>>> Er, surely the same goes for sys_sendfile? Why have a new system
>>> call rather than just swapping the 'in' and 'out' fds?
>>There is an assumption that one is a linear stream of output (in this
>>case a socket) and the other one is a page cache based file.
> That's an implementation detail and it's not clear we should be exposing it
> to the user. It's not entirely insane to contemplate socket->socket or
> file->file sendfile either -- would we invent new system calls for those
> too? File descriptors are file descriptors.

I was rather disappointed when file->file sendfile was [purposefully?]
broken in 2.5.x...


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