On Thu, 21 Sep 2006, Peter Jeremy wrote:
On Wed, 2006-Sep-20 23:59:13 +0200, Andre Oppermann wrote:
I have rewritten kern_sendfile() to work in two loops, the inner which
turns as many pages into mbufs as it can up to the free send socket buffer
space.
The 64K blocks sounds good but how does this interact with TCP slow start?
Is there the possibility that a couple (for some reasonably large value of
'couple') of TCP connections slowly accepting a file could eat all the mbuf
space?
In principle, existing socket buffer resource limits are the way to prevent
this from happening -- sendfile() should continue to obey them as before, we
are just better able to use the available buffer space if it exists.
Robert N M Watson
Computer Laboratory
University of Cambridge
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