Messages in this thread | ![/](/images/icornerl.gif) | | Subject | Re: [PATCH] mm/alloc: fallback to first node if the wanted node offline | From | Vlastimil Babka <> | Date | Tue, 4 Dec 2018 15:42:08 +0100 |
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On 12/4/18 9:56 AM, Michal Hocko wrote: >> The device's node num is 2. And in my case, I used nr_cpus param. Due >> to init_cpu_to_node() initialize all the possible node. It is hard >> for me to figure out without this param, how zonelists is accessed >> before page allocator works. > I believe we should focus on this. Why does the node have no zonelist > even though all zonelists should be initialized already? Maybe this is > nr_cpus pecularity and we do not initialize all the existing numa nodes. > Or maybe the device is associated to a non-existing node with that > setup. A full dmesg might help us here.
Yes, a full dmesg should contain line such as this one:
[ 0.137407] Built 1 zonelists, mobility grouping on. Total pages: 6181664
That should at least tell us if nr_cpus=X resulted in some node's zonelists not being built.
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