From: Eric Dumazet <eric.dumazet@gmail.com>
To: Li Yu <raise.sail@gmail.com>
Cc: netdev@vger.kernel.org
Subject: Re: [PATCH net-next] rps: introduce a new sysctl switch rps_workaround_buggy_driver
Date: Thu, 05 Apr 2012 13:07:07 +0200 [thread overview]
Message-ID: <1333624027.18626.579.camel@edumazet-glaptop> (raw)
In-Reply-To: <4F7D7464.7040503@gmail.com>
On Thu, 2012-04-05 at 18:31 +0800, Li Yu wrote:
> We encountered a buggy NIC driver or hardware/firmware, it keeps
> non-zero constant skb->rxhash for long time, so if we enabled RPS,
> the targeted CPU keeps same for long time too.
>
> This patch introduces a sysctl switch to workaround for such problem,
> if the switch was on, RPS core discards the skb->rxhash that is
> computed by NIC hardware.
>
> Hope this patch also can help others, thanks.
Really ?
to disable this driver rxhash, you should try :
ethtool -K eth0 rxhash off
next prev parent reply other threads:[~2012-04-05 11:07 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-05 10:31 [PATCH net-next] rps: introduce a new sysctl switch rps_workaround_buggy_driver Li Yu
2012-04-05 10:44 ` David Miller
2012-04-05 11:07 ` Eric Dumazet [this message]
2012-04-06 2:07 ` Li Yu
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