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Date: Mon, 30 Sep 2013 13:43:35 +0200 (CEST) From: Julia Lawall <julia.lawall@...6.fr> To: "Ruslan N. Marchenko" <me@...f.mobi> cc: linux-kernel@...r.kernel.org 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. There has already been a discussion about this, and a patch has already been proposed. It has to do with lock managament. I will look for the email. julia -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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