Re: [patch 3/9] mempool - Make mempools NUMA aware

Pavel Machek
2006-01-28T22:59:07Z

Hi!

> >If sending routines can work with constant ammount of memory, why use
> >kmalloc at all? Anyway I thought we were talking receiving side
> >earlier in the thread.
> >
> >Ouch and wait a moment. You claim that GFP_KERNEL allocations can't
> >block/sleep? Of course they can, that's why they are GFP_KERNEL and
> >not GFP_ATOMIC.
> >
> I didn't meant GFP_KERNEL allocations cannot block/sleep? When in
> emergency, we
> want even the GFP_KERNEL allocations that are made by critical sockets
> not to block/sleep.
> So my original critical sockets patches changes the gfp flag passed to
> these allocation requests
> to GFP_KERNEL|GFP_CRITICAL.

Could we get description of what you are really trying to achieve?
I don't know what "critical socket" is, when you are "in emergency",
etc. When I am in emergency, I just dial 112...

[Having enough memory on the send side will not mean you'll be able to
send data at TCP layer.]

You seem to have some rather strange needs, that are maybe best served
by s/GFP_KERNEL/GFP_ATOMIC/ in network layer; but we can't / don't
want to do that in vanilla kernel -- your case is too specialized for
that. (Ouch and it does not work anyway without rewriting network
stack...)
Pavel
--
Thanks, Sharp!