Messages in this thread | | | Date | Wed, 22 Mar 2023 09:16:55 -0700 | Subject | Re: [PATCH] mm/slab: Fix undefined init_cache_node_node() for NUMA and !SMP | From | Dave Hansen <> |
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On 3/21/23 09:40, Matthew Wilcox wrote: > On Tue, Mar 21, 2023 at 09:30:59AM +0100, Geert Uytterhoeven wrote: >> -#if (defined(CONFIG_NUMA) && defined(CONFIG_MEMORY_HOTPLUG)) || defined(CONFIG_SMP) >> +#if defined(CONFIG_NUMA) || defined(CONFIG_SMP) > I'm amused by the thought of CONFIG_NUMA without CONFIG_SMP. > Is it possible to have one node with memory and a single CPU, then > another node with memory and no CPU?
It's _possible_ for sure, just unlikely. The most likely place these days is probably a teensy tiny VM that just happens to have some performance-differentiated memory exposed to it for some reason. Maybe it's got a slice of slow PMEM or fast High-Bandwidth memory for whatever reason.
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