Messages in this thread | | | From | Thomas Garnier <> | Date | Wed, 19 Apr 2017 07:56:36 -0700 | Subject | Re: KASLR causes intermittent boot failures on some systems |
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On Wed, Apr 19, 2017 at 7:34 AM, Dan Williams <dan.j.williams@intel.com> wrote: > Does the randomization ever cross a pgd boundary?
Yes, it can cross a pgd boundary. The original physical memory mapping might as well but you would need almost 550Gb of memory.
> > These crashes look very similar to the crashes caused by > arch_add_memory() racing itself. This issue was fixed in: > > f931ab479dd2 mm: fix devm_memremap_pages crash, use > mem_hotplug_{begin, done} > > ...but that only helps users that call mem_hotplug_begin() to prevent > concurrent updates. >
It could be related to page table changes done concurrently or just done with certain expectations.
-- Thomas
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