Re: [PATCH] SLUB use cmpxchg_local

[Christoph Lameter]

On Mon, 27 Aug 2007, Mathieu Desnoyers wrote:

> > The slow path would require disable preemption and two interrupt disables.
> If the slow path have to call new_slab, then yes. But it seems that not
> every slow path must call it, so for the other slow paths, only one
> interrupt disable would be required.

If we include new_slab then we get to 3 times:

1. In the cmpxchg_local emulation that fails

2. For the slow path

3. When calling the page allocator.

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