netdev - Re: BUG: using smp_processor_id() in preemptible [00000000] code: avahi-daemon: caller is netif

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Message-Id: <20100415.003711.159334670.davem@davemloft.net>
Date:	Thu, 15 Apr 2010 00:37:11 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	xiaosuo@...il.com
Cc:	eric.dumazet@...il.com, therbert@...gle.com, eparis@...hat.com,
	netdev@...r.kernel.org
Subject: Re: BUG: using smp_processor_id() in preemptible [00000000] code:
 avahi-daemon: caller is netif_rx

From: Changli Gao <xiaosuo@...il.com>
Date: Thu, 15 Apr 2010 15:30:44 +0800

> Should netif_rx() be used only when preemption is disabled? If not,
> netif_rx_ni() should be used instead.?

netif_rx() must be invoked from a hardware or software interrupt,
which implies preemption disabled.

In netif_rx_ni(), the "ni" means "not interrupt".
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