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Date: Tue, 16 Feb 2010 22:45:28 +0200 From: Pekka Enberg <penberg@...helsinki.fi> To: Nick Piggin <npiggin@...e.de> CC: David Rientjes <rientjes@...gle.com>, Andi Kleen <andi@...stfloor.org>, linux-kernel@...r.kernel.org, linux-mm@...ck.org, haicheng.li@...el.com Subject: Re: [PATCH] [3/4] SLAB: Set up the l3 lists for the memory of freshly added memory v2 Nick Piggin wrote: > On Mon, Feb 15, 2010 at 01:47:29PM -0800, David Rientjes wrote: >> On Mon, 15 Feb 2010, Nick Piggin wrote: >> >>>>> @@ -1577,6 +1595,8 @@ void __init kmem_cache_init_late(void) >>>>> */ >>>>> register_cpu_notifier(&cpucache_notifier); >>>>> >>>>> + hotplug_memory_notifier(slab_memory_callback, SLAB_CALLBACK_PRI); >>>>> + >>>> Only needed for CONFIG_NUMA, but there's no side-effects for UMA kernels >>>> since status_change_nid will always be -1. >>> Compiler doesn't know that, though. >>> >> Right, setting up a memory hotplug callback for UMA kernels here isn't >> necessary although slab_node_prepare() would have to be defined >> unconditionally. I made this suggestion in my review of the patchset's >> initial version but it was left unchanged, so I'd rather see it included >> than otherwise stall out. This could always be enclosed in >> #ifdef CONFIG_NUMA later just like the callback in slub does. > > It's not such a big burden to annotate critical core code with such > things. Otherwise someone else ends up eventually doing it. Yes, please. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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