Messages in this thread Patch in this message | | | From | Zoltan Kiss <> | Subject | [PATCH net-next v6 8/10] xen-netback: Add stat counters for frag_list skbs | Date | Tue, 4 Mar 2014 22:32:19 +0000 |
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These counters help determine how often the guest sends a packet with more than MAX_SKB_FRAGS frags.
NOTE: if bisect brought you here, you should apply the series up until #9, otherwise malicious guests can block other guests by not releasing their sent packets.
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(+)
diff --git a/drivers/net/xen-netback/common.h b/drivers/net/xen-netback/common.h index eac171e..d8a2298 100644 --- a/drivers/net/xen-netback/common.h +++ b/drivers/net/xen-netback/common.h @@ -170,6 +170,7 @@ 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; diff --git a/drivers/net/xen-netback/interface.c b/drivers/net/xen-netback/interface.c index adfed30..ba5be2f 100644 --- a/drivers/net/xen-netback/interface.c +++ b/drivers/net/xen-netback/interface.c @@ -252,6 +252,13 @@ 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)
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