From: Vlad Yasevich <vyasevic@redhat.com>
To: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Thomas Huth <thuth@linux.vnet.ibm.com>,
David Miller <davem@davemloft.net>,
netdev@vger.kernel.org
Subject: Re: [PATCH] macvtap: fix two races
Date: Fri, 09 Aug 2013 14:01:00 -0400 [thread overview]
Message-ID: <52052E5C.6060000@redhat.com> (raw)
In-Reply-To: <1376070067.20509.1.camel@edumazet-glaptop>
On 08/09/2013 01:41 PM, Eric Dumazet wrote:
> On Fri, 2013-08-09 at 13:16 -0400, Vlad Yasevich wrote:
>
>> I was looking at this a bit more and I think this call to
>> macvlan_count_rx() is double counting the packets.
>>
>> In macvlan_handle_frame(), we call macvlan_count_rx() after we call
>> vlan->receive(). For macvtap, receive() function is essentially
>> macvtap_forward() which just tacks the data onto the queue.
>>
>> Then, the above code counts the data again as we pull it off the queue
>> socket queue to give to the user.
>
> Hmm, it seems a different issue, and probably needs a patch on its own.
>
> When was this problem added ?
>
>
Looks like both macvlan and macvtap packet counting has been there since
the beginning...
-vlad
next prev parent reply other threads:[~2013-08-09 18:01 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-07 14:43 macvtap bug: using smp_processor_id() in preemptible code Thomas Huth
2013-08-07 15:26 ` Eric Dumazet
2013-08-08 8:25 ` Thomas Huth
2013-08-08 13:21 ` Eric Dumazet
2013-08-08 13:56 ` Thomas Huth
2013-08-08 14:04 ` Eric Dumazet
2013-08-08 15:06 ` [PATCH] macvtap: fix two races Eric Dumazet
2013-08-09 17:16 ` Vlad Yasevich
2013-08-09 17:41 ` Eric Dumazet
2013-08-09 18:01 ` Vlad Yasevich [this message]
2013-08-12 4:50 ` David Miller
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