On receiving the MEM_GOING_OFFLINE notification, we disallow offlining of
any boot memory by checking if section_early or not. With the introduction
of SECTION_MARK_HOTPLUGGABLE, allow boot mem sections that are marked as
hotpluggable with this bit set to be offlined and removed. This now allows
certain boot mem sections to be offlined.
Signed-off-by: Sudarshan Rajagopalan <sudar...@codeaurora.org>
Cc: Catalin Marinas <catalin.mari...@arm.com>
Cc: Will Deacon <w...@kernel.org>
Cc: Anshuman Khandual <anshuman.khand...@arm.com>
Cc: Mark Rutland <mark.rutl...@arm.com>
Cc: Gavin Shan <gs...@redhat.com>
Cc: Logan Gunthorpe <log...@deltatee.com>
Cc: David Hildenbrand <da...@redhat.com>
Cc: Andrew Morton <a...@linux-foundation.org>
Cc: Steven Price <steven.pr...@arm.com>
Cc: Suren Baghdasaryan <sur...@google.com>
---
arch/arm64/mm/mmu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
index 75df62fea1b6..fb8878698672 100644
--- a/arch/arm64/mm/mmu.c
+++ b/arch/arm64/mm/mmu.c
@@ -1487,7 +1487,7 @@ static int prevent_bootmem_remove_notifier(struct
notifier_block *nb,
for (; pfn < end_pfn; pfn += PAGES_PER_SECTION) {
ms = __pfn_to_section(pfn);
- if (early_section(ms))
+ if (early_section(ms) && !removable_section(ms))
return NOTIFY_BAD;
}
return NOTIFY_OK;
--
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a Linux Foundation Collaborative Project
