On Tue, Feb 18, 2020 at 7:05 PM Baoquan He <bhe@xxxxxxxxxx> wrote: > > From: Wei Yang <richardw.yang@xxxxxxxxxxxxxxx> > > When we use SPARSEMEM instead of SPARSEMEM_VMEMMAP, pfn_to_page() > doesn't work before sparse_init_one_section() is called. This leads to a > crash when hotplug memory: I'd also add: "On x86 the impact is limited to x86_32 builds, or x86_64 configurations that override the default setting for SPARSEMEM_VMEMMAP". Other than that: Reviewed-by: Dan Williams <dan.j.williams@xxxxxxxxx>
