On Wed, Dec 18, 2002 at 04:53:00AM +0900, Kyunghwan Kim wrote:
> On Tue, Dec 17, 2002 at 02:31:31PM -0500, Andrew Gallatin wrote:
> >  > mbuf and bpf routines are all mp-safe, so it seems that
> >  > it is safe to make network device drivers out of Giant lock.
> >  > Or is there any unresolved related issues?
> > 
> > Yes, the mbuf allocator must occasionally call kmem_malloc(), which
> > requires Giant.    This means no net driver can be made INTR_MPSAFE,
> > or it will eventually panic when kmem_malloc is called. 
> I found and read the thread that you and Alan had discussed about this
> problem just before. Then what about making updated version of mb_pop_cont()
> that accepts occasionally acquiring Giant?

Oh, sorry. Conclusion of the thread was preallocation.
But it doesn't seem that preallocation is the correct way.
Kyunghwan Kim

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