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    SubjectRe: [PATCH v3] mm: fix panic in __alloc_pages
    Date


    > On Dec 9, 2021, at 5:29 AM, Michal Hocko <mhocko@suse.com> wrote:
    >
    > On Thu 09-12-21 10:23:52, Alexey Makhalov wrote:
    >>
    >>
    >>> On Dec 9, 2021, at 1:56 AM, Michal Hocko <mhocko@suse.com> wrote:
    >>>
    >>> On Thu 09-12-21 09:28:55, Alexey Makhalov wrote:
    >>>>
    >>>>
    >>>> [ 0.081777] Node 4 uninitialized by the platform. Please report with boot dmesg.
    >>>> [ 0.081790] Initmem setup node 4 [mem 0x0000000000000000-0x0000000000000000]
    >>>> ...
    >>>> [ 0.086441] Node 127 uninitialized by the platform. Please report with boot dmesg.
    >>>> [ 0.086454] Initmem setup node 127 [mem 0x0000000000000000-0x0000000000000000]
    >>>
    >>> Interesting that only those two didn't get a proper arch specific
    >>> initialization. Could you check why? I assume init_cpu_to_node
    >>> doesn't see any CPU pointing at this node. Wondering why that would be
    >>> the case but that can be a bug in the affinity tables.
    >>
    >> My bad shrinking. Not just these 2, but all possible and not present nodes from 4 to 127
    >> are having this message.
    >
    > Does that mean that your possible (but offline) cpus do not set their
    > affinity?
    >
    Hi Michal,

    I didn’t quite gut a question here. Do you mean scheduler affinity for offlined/not present CPUs?
    From the patch, this message should be printed for every possible offlined node:
    for_each_node(nid) {
    ...
    if (!node_online(nid)) {
    pr_warn("Node %d uninitialized by the platform. Please report with boot dmesg.\n", nid);

    Thanks,
    —Alexey


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