On 9/6/23 00:39, Adrian Hunter wrote: > @@ -559,7 +567,8 @@ static int vmcore_remap_oldmem_pfn(struct vm_area_struct *vma, > * pages without a reason. > */ > idx = srcu_read_lock(&vmcore_cb_srcu); > - if (!list_empty(&vmcore_cb_list)) > + if (!list_empty(&vmcore_cb_list) || > + range_contains_unaccepted_memory(paddr, paddr + size)) > ret = remap_oldmem_pfn_checked(vma, from, pfn, size, prot); > else > ret = remap_oldmem_pfn_range(vma, from, pfn, size, prot); The whole callback mechanism which fs/proc/vmcore.c::pfn_is_ram() implements seems to be in place to ensure that there aren't a billion different "ram" checks in here. Is there a reason you can't register_vmcore_cb() a callback to check for unaccepted memory?
