linux-kernel - Re: [BUG] Regression in 2fdac010 drivers/net/ethernet/via/via-velocity.c: update napi implementation

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Message-ID: <alpine.DEB.2.02.1309301353150.2036@localhost6.localdomain6>
Date:	Mon, 30 Sep 2013 13:54:06 +0200 (CEST)
From:	Julia Lawall <julia.lawall@...6.fr>
To:	"Ruslan N. Marchenko" <me@...f.mobi>
cc:	linux-kernel@...r.kernel.org, Julia Lawall <Julia.Lawall@...6.fr>
Subject: Re: [BUG] Regression in 2fdac010 drivers/net/ethernet/via/via-velocity.c:
 update napi implementation

On Mon, 30 Sep 2013, Ruslan N. Marchenko wrote:

> Hi Julia et al.,
> 
> With this commit VIA NANO board get CPU lockup in random places on any network activity.
> The error is random, most of the times dead locked CPU on boot.
> 
> After loading via-velocity module it hangs for a while and then spits kernel mesages
> about hanged tasks from varios places - like ata, rcu_preempt or network stack.
> Also, if you boot the box with network disconnected - it works, until you plug the network cable.
> 
> On some kernel builds (like ubuntu stock) behaviour varies, sometimes the box itself works,
> but network stack dies after multiple ICMPv6 skb errors, so box ends up with network disconnected.
> Reloading network susbsys helps to recover for some time (depending on how fast eth led is blinking).
> 
> Reverting the patch allows me to boot without problems even from latest Linus trunk and send this mail.

You can find the discussion and improved patch in this thread:

http://www.spinics.net/lists/netdev/msg251287.html
Bug - regression - Via velocity interface coming up freezes kernel
From: Dirk Kraft <dirk.kraft@...xxxxxx>
Date: Sun, 22 Sep 2013 19:28:52 +0200

julia




> 
> Regards,
> Ruslan
> 
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