On Mon, 12 Nov 2007, Eric Dumazet wrote: > Christoph Lameter a écrit : > > On Mon, 12 Nov 2007, Herbert Xu wrote: > > > > > David Miller <[EMAIL PROTECTED]> wrote: > > > > Each IP compression tunnel instance does an alloc_percpu(). > > > Actually all IPComp tunnels share one set of objects which are > > > allocated per-cpu. So only the first tunnel would do that. > > > > Ahh so the need to be able to expand per cpu memory storage on demand is not > > as critical as we thought. > > > > Yes, but still desirable for future optimizations. > > For example, I do think using a per cpu memory storage on net_device refcnt & > last_rx could give us some speedups.
Note that there was a new patchset posted (titled cpu alloc v1) that provides on demand extension of the cpu areas. See http://marc.info/?l=linux-kernel&m=119438261304093&w=2
