Re: [patch 08/10] SLUB: Optional fast path using cmpxchg_local

[Christoph Lameter]

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.

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/