On Mon, 4 Mar 2013, Joonsoo Kim wrote: > With SMP and enabling kmap_high_get(), it makes users of kmap_atomic() > sequential ordered, because kmap_high_get() use global kmap_lock(). > It is not welcome situation, so turn off this optimization for SMP.
I'm not sure I understand the problem. The lock taken by kmap_high_get() is released right away before that function returns and therefore this is not actually serializing anything. Nicolas -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/