Messages in this thread |  | | From | David Woodhouse <> | Subject | Re: Early SPECWeb99 results on 2.5.33 with TSO on e1000 | Date | Tue, 17 Sep 2002 00:03:19 +0100 |
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davem@redhat.com 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.
> It would be nice to extend sys_sendfile to work properly in both ways > in a manner that Linus would accept, want to work on that?
Yeah -- I'll add it to the TODO list. Scheduled for some time in 2007 :)
More seriously though, I'd hope that whoever implemented what you call 'sys_receivefile' would solve this issue, as 'sys_receivefile' isn't really useful as anything more than a handy nomenclature for describing the process in question.
-- dwmw2
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