Subject: Re: [Xen-devel] [PATCH net-next v6 8/10] xen-netback: Add stat counters for frag_list skbs

From: Zoltan Kiss <[email-masked]>
Date: Wed, 5 Mar 2014 19:17:33 +0000

Hi,

I've changed the numbers to actual patch names, thanks. Btw. your 
replies doesn't have In-reply-to header, it breaks sorting into threads.

Zoli

On 05/03/14 02:17, Konrad Rzeszutek Wilk wrote:
>
> On Mar 4, 2014 5:32 PM, Zoltan Kiss <[email-masked]> wrote:
>>
>> 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,
>
> s/#9/"the name of the patch.."
>
>> otherwise malicious guests can block other guests by not releasing their sent
>> packets.
>>
>> Signed-off-by: Zoltan Kiss <[email-masked]>
>> ---
>> 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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