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SubjectRe: [patch 08/10] SLUB: Optional fast path using cmpxchg_local
On Sun, 28 Oct 2007, Pekka J Enberg wrote:

> Can you please write a comment of the locking rules when cmpxchg_local()
> is used? Looks as if we could push that local_irq_save() to slub_lock()
> and local_irq_restore() to slub_unlock() and deal with the unused flags
> variable for the non-CONFIG_FAST_CMPXCHG_LOCAL case with a macro, no?

Hmmmm... Maybe .. The locking rules are not changed at all by this patch.
The cmpxchg_local is only used for the per cpu object list. The per cpu
slabs are frozen.

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