Re: [Xen-devel] 3.0.4: Soft lockup in netfront in SMP build

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 21/4/07 22:45, "Graham, Simon" <Simon.Graham@xxxxxxxxxxx> wrote:

> Oops! 
> 
> I see from the unstable tree that this code was recently modified to use
> spin_lock_bh() instead of spin_lock() as part of a mega-merge of IA64 code -
> clearly we cant merge this changeset into 3.0.4.
> 
> I haven't looked too closely at all of the code yet, but I'm wondering if a
> judicious change of spin_lock to spin_lock_bh in netfront would be the best
> approach?

Actually the fixes are localised in changesets 14844 and 14851. These should
be easily portable to the kernel(s) of your choice. Thanks are due again to
Jeremy for finding these nasty lurking deadlocks (albeit with automated
assistance :-).

 -- Keir



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