Re: [PATCH v2 02/32] kho: mm: Don't allow deferred struct page with KHO
From: Mike Rapoport <rppt@kernel.org>
Date: 2025-07-28 10:14:57
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On Wed, Jul 23, 2025 at 02:46:15PM +0000, Pasha Tatashin wrote:
KHO uses struct pages for the preserved memory early in boot, however,
with deferred struct page initialization, only a small portion of
memory has properly initialized struct pages.
This problem was detected where vmemmap is poisoned, and illegal flag
combinations are detected.
Don't allow them to be enabled together, and later we will have to
teach KHO to work properly with deferred struct page init kernel
feature.
Fixes: 990a950fe8fd ("kexec: add config option for KHO")
Signed-off-by: Pasha Tatashin <pasha.tatashin@soleen.com>Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
quoted hunk ↗ jump to hunk
--- kernel/Kconfig.kexec | 1 + 1 file changed, 1 insertion(+)diff --git a/kernel/Kconfig.kexec b/kernel/Kconfig.kexec index 2ee603a98813..1224dd937df0 100644 --- a/kernel/Kconfig.kexec +++ b/kernel/Kconfig.kexec@@ -97,6 +97,7 @@ config KEXEC_JUMP config KEXEC_HANDOVER bool "kexec handover" depends on ARCH_SUPPORTS_KEXEC_HANDOVER && ARCH_SUPPORTS_KEXEC_FILE + depends on !DEFERRED_STRUCT_PAGE_INIT select MEMBLOCK_KHO_SCRATCH select KEXEC_FILE select DEBUG_FS-- 2.50.0.727.gbf7dc18ff4-goog
-- Sincerely yours, Mike.