Messages in this thread | | | Date | Sun, 28 Oct 2007 19:59:27 -0700 (PDT) | From | Christoph Lameter <> | Subject | Re: [patch 08/10] SLUB: Optional fast path using cmpxchg_local |
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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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