Re: tx_timeout and timer serialisation

[Andrew Morton <andrewm@xxxxxxxxxx>]

Andrey Savochkin wrote:
> 
> We need to serialize the timer handler with outside code (which runs not in
> BH or IRQ context).  For 2.2 del_timer call should be in bh_atomic section.

hmm.. I'm not too familiar with that part of 2.2.  Could you please cook
up a patch to show me what you mean, then I'll torture it a bit.

Does the BH synchronisation work within a BH or an IRQ?  What happens if
we call del_timer within a BH or IRQ when the handler is currently
running? 


-- 
-akpm-