netdev - Re: [PATCH 2/5] net: mvneta: use per_cpu stats to fix an SMP lock up

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Message-ID: <1389573903.31367.190.camel@edumazet-glaptop2.roam.corp.google.com>
Date:	Sun, 12 Jan 2014 16:45:03 -0800
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Willy Tarreau <w@....eu>
Cc:	davem@...emloft.net, netdev@...r.kernel.org,
	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
	Gregory CLEMENT <gregory.clement@...e-electrons.com>
Subject: Re: [PATCH 2/5] net: mvneta: use per_cpu stats to fix an SMP lock up

On Sun, 2014-01-12 at 23:09 +0100, Willy Tarreau wrote:

> But we can have multiple tx in parallel, one per queue. And it's only
> when I explicitly bind two servers to two distinct CPU cores that I
> can trigger the issue, which seems to confirm that this is the cause
> of the issue.

So this driver has multiqueue ?

Definitely it should have one syncp per queue.

Or per cpu stats, as your patch did.

Thanks !


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