netdev - Re: [PATCH] slip: fix NOHZ local_softirq

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Date:	Wed, 10 Aug 2011 16:33:28 +0200
From:	Oliver Hartkopp <socketcan@...tkopp.net>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>, matvejchikov@...il.com
CC:	netdev@...r.kernel.org
Subject: Re: [PATCH] slip: fix NOHZ local_softirq_pending 08 warning

On 10.08.2011 11:28, Alan Cox wrote:
>>   2) From tty_flip_buffer_push() which schedules the flush_to_ldisc to
>> work or calls it directly if the tty->low_latency set.
>>
>> So the only thing we must take into account that with tty->low_latency
>> set we can be in IRQ context when doing with netif_rx_ni(). But if we
> 
> A driver is not permitted to directly call into flush_to_ldisc from an
> interrupt so that case doesn't happen.
> 

Thanks to both of you for the explanation!

I'll send a patch for slcan.c then.

Best regards,
Oliver
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