@@ -158,6 +158,7 @@ struct xenvif {
unsigned long tx_zerocopy_sent;
unsigned long tx_zerocopy_success;
unsigned long tx_zerocopy_fail;
+ unsigned long tx_frag_overflow;
/* Miscellaneous private stuff. */
struct net_device *dev;
@@ -254,6 +254,13 @@ static const struct xenvif_stat {
"tx_zerocopy_fail",
offsetof(struct xenvif, tx_zerocopy_fail)
},
+ /* Number of packets exceeding MAX_SKB_FRAG slots. You should use
+ * a guest with the same MAX_SKB_FRAG
+ */
+ {
+ "tx_frag_overflow",
+ offsetof(struct xenvif, tx_frag_overflow)
+ },
};
static int xenvif_get_sset_count(struct net_device *dev, int string_set)
@@ -1656,6 +1656,7 @@ static int xenvif_tx_submit(struct xenvif *vif, int budget)
skb_shinfo(skb)->tx_flags |= SKBTX_DEV_ZEROCOPY;
skb_shinfo(nskb)->tx_flags |= SKBTX_DEV_ZEROCOPY;
vif->tx_zerocopy_sent += 2;
+ vif->tx_frag_overflow++;
nskb = skb;
skb = skb_copy_expand(skb, 0, 0, GFP_ATOMIC | __GFP_NOWARN);
These counters help determine how often the guest sends a packet with more than MAX_SKB_FRAGS frags. Signed-off-by: Zoltan Kiss <zoltan.kiss@citrix.com> --- drivers/net/xen-netback/common.h | 1 + drivers/net/xen-netback/interface.c | 7 +++++++ drivers/net/xen-netback/netback.c | 1 + 3 files changed, 9 insertions(+) -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html