On Wed, 2007-05-16 at 15:00 +0200, Mikulas Patocka wrote:
> Hi
>
> On one of my machines with tickless kernel and plip I get messages :
I bet this is a machine a P4 with Hyperthreading enabled ?
> NOHZ: local_softirq_pending 08
>
> always when using plip (on other machine with tickless kernel and plip I
> get no errors). Thebug happens both on 2.6.21 and 2.6.22-rc1
>
> This patch fixes that. Note that plip calls netif_rx neither from hardware
> interrupt nor from ksoftirqd, so there is no one who would wake
> ksoftirqd then. netif_tx calls only
> __raise_softirq_irqoff(NET_RX_SOFTIRQ), which sets softirq bit, but
> doesn't wake ksoftirqd.
Dave,
can we please get rid of __raise_softirq_irqoff() at all ? These micro
optimizations are causing more trouble than they are worth.
tglx
> Mikulas
>
> Signed-off-by: Mikulas Patocka <[email protected]
>
> --- linux-2.6.22-rc1/net/core/dev.c_ Fri May 18 07:51:01 2007
> +++ linux-2.6.22-rc1/net/core/dev.c Fri May 18 07:51:06 2007
> @@ -1117,7 +1117,7 @@
> dev->quota += dev->weight;
> else
> dev->quota = dev->weight;
> - __raise_softirq_irqoff(NET_RX_SOFTIRQ);
> + raise_softirq_irqoff(NET_RX_SOFTIRQ);
> local_irq_restore(flags);
> }
> EXPORT_SYMBOL(__netif_rx_schedule);
-
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