On 2017年01月04日 00:54, John Fastabend wrote:
+ /* Changing the headroom in buffers is a disruptive operation because
+ * existing buffers must be flushed and reallocated. This will happen
+ * when a xdp program is initially added or xdp is disabled by removing
+ * the xdp program.
+ */
We probably need reset the device here, but maybe Michale has more ideas. And if
we do this, another interesting thing to do is to disable EWMA and always use a
single page for each packet, this could almost eliminate linearizing.
Well with normal MTU 1500 size we should not hit the linearizing case right?
My reply may be not clear, for 1500 I mean for small buffer only.
Thanks
The
question is should we cap the MTU at GOOD_PACKET_LEN vs the current cap of
(PAGE_SIZE - overhead).
