tree 541546c9e967a1d4c6be385231980637149599be
parent d956a048cd3fc1ba154101a1a50fb37950081ff6
author Jesper Dangaard Brouer <brouer@redhat.com> 1560863158 +0200
committer David S. Miller <davem@davemloft.net> 1560957793 -0400

xdp: add tracepoints for XDP mem

These tracepoints make it easier to troubleshoot XDP mem id disconnect.

The xdp:mem_disconnect tracepoint cannot be replaced via kprobe. It is
placed at the last stable place for the pointer to struct xdp_mem_allocator,
just before it's scheduled for RCU removal. It also extract info on
'safe_to_remove' and 'force'.

Detailed info about in-flight pages is not available at this layer. The next
patch will added tracepoints needed at the page_pool layer for this.

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>