Linux-kernel mailing list archive 1998-49,: Re: 2.1.131-ac3 3c509 no irq_save in the sender code

# Re: 2.1.131-ac3 3c509 no irq_save in the sender code

Andrea Arcangeli (andrea@e-mind.com)
Wed, 9 Dec 1998 17:20:43 +0100 (CET)

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On Wed, 9 Dec 1998, Alan Cox wrote:

>> to run while the TX is on the fly. But to do that we don' t need the
>> spin_lock in el3_interrupt, update_stats will just spin on the lock itself
>> if needed. And disable_irq() just synchronize_irqs itself btw (I was wrong
>> in my last email).
>
>You need the lock to protect update stats being called by user space
>(eg cat /proc/net/dev) during an IRQ on the other processor or you have
>a similar pattern of accidents with the read fifo pulling data out of the
>stats buffer

Ah, OK...

Andrea Arcangeli

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