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17408
2013 Jun 12
26
Interesting observation with network event notification and batching
Hi all
I''m hacking on a netback trying to identify whether TLB flushes causes
heavy performance penalty on Tx path. The hack is quite nasty (you would
not want to know, trust me).
Basically what is doesn''t is, 1) alter network protocol to pass along
mfns instead of grant references, 2) when the backend sees a new mfn,
map it RO and cache it in its own address space.
With this