Messages in this thread | | | From | James Morse <> | Subject | [PATCH 0/2] Hibernate fixes for 'Fix memmap to be initialized for the entire section' | Date | Fri, 2 Dec 2016 14:49:07 +0000 |
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Patch "arm64: mm: Fix memmap to be initialized for the entire section" changes pfn_valid() in a way that breaks hibernate. These patches fix hibernate, and provided struct page's are allocated for nomap pages, can be applied before [0].
Hibernate core code belives 'valid' to mean "I can access this". It uses pfn_valid() to test the page if the page is 'valid'.
pfn_valid() needs to be changed so that all struct pages in a numa node have the same node-id. Currently 'nomap' pages are skipped, and retain their pre-numa node-ids, which leads to a later BUG_ON().
These patches make hibernate's savable_page() take its escape route via 'if (PageReserved(page) && pfn_is_nosave(pfn))'.
[0] https://lkml.org/lkml/2016/11/30/566
James Morse (2): arm64: mm: Mark nomap regions with the PG_reserved flag arm64: hibernate: report nomap regions as being pfn_nosave
arch/arm64/kernel/hibernate.c | 6 +++++- arch/arm64/mm/init.c | 14 ++++++++++++++ 2 files changed, 19 insertions(+), 1 deletion(-)
-- 2.10.1
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