The crashkernel is reserved via memblock_reserve(). memblock_free_all()
will call free_low_memory_core_early(), which will go over all reserved
memblocks, marking the pages as PG_reserved.
So manually marking pages as PG_reserved is not necessary, they are
already in the desired state (otherwise they would have been handed over
to the buddy as free pages and bad things would happen).
Cc: Catalin Marinas <catalin.mari...@arm.com>
Cc: Will Deacon <will.dea...@arm.com>
Cc: James Morse <james.mo...@arm.com>
Cc: Bhupesh Sharma <bhsha...@redhat.com>
Cc: David Hildenbrand <da...@redhat.com>
Cc: Mark Rutland <mark.rutl...@arm.com>
Cc: Dave Kleikamp <dave.kleik...@oracle.com>
Cc: Andrew Morton <a...@linux-foundation.org>
Cc: Mike Rapoport <r...@linux.vnet.ibm.com>
Cc: Michal Hocko <mho...@suse.com>
Cc: Florian Fainelli <f.faine...@gmail.com>
Cc: Stefan Agner <ste...@agner.ch>
Cc: Laura Abbott <labb...@redhat.com>
Cc: Greg Hackmann <ghackm...@android.com>
Cc: Johannes Weiner <han...@cmpxchg.org>
Cc: Kristina Martsenko <kristina.martse...@arm.com>
Cc: CHANDAN VN <chandan...@samsung.com>
Cc: AKASHI Takahiro <takahiro.aka...@linaro.org>
Cc: Logan Gunthorpe <log...@deltatee.com>
Signed-off-by: David Hildenbrand <da...@redhat.com>
---
arch/arm64/kernel/machine_kexec.c | 2 +-
arch/arm64/mm/init.c | 27 ---------------------------
2 files changed, 1 insertion(+), 28 deletions(-)
diff --git a/arch/arm64/kernel/machine_kexec.c
b/arch/arm64/kernel/machine_kexec.c
index 6f0587b5e941..66b5d697d943 100644
--- a/arch/arm64/kernel/machine_kexec.c
+++ b/arch/arm64/kernel/machine_kexec.c
@@ -321,7 +321,7 @@ void crash_post_resume(void)
* but does not hold any data of loaded kernel image.
*
* Note that all the pages in crash dump kernel memory have been initially
- * marked as Reserved in kexec_reserve_crashkres_pages().
+ * marked as Reserved as memory was allocated via memblock_reserve().
*
* In hibernation, the pages which are Reserved and yet "nosave" are excluded
* from the hibernation iamge. crash_is_nosave() does thich check for crash
diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
index a8f2e4792ef9..9dcfa809b7ab 100644
--- a/arch/arm64/mm/init.c
+++ b/arch/arm64/mm/init.c
@@ -118,35 +118,10 @@ static void __init reserve_crashkernel(void)
crashk_res.start = crash_base;
crashk_res.end = crash_base + crash_size - 1;
}
-
-static void __init kexec_reserve_crashkres_pages(void)
-{
-#ifdef CONFIG_HIBERNATION
- phys_addr_t addr;
- struct page *page;
-
- if (!crashk_res.end)
- return;
-
- /*
- * To reduce the size of hibernation image, all the pages are
- * marked as Reserved initially.
- */
- for (addr = crashk_res.start; addr < (crashk_res.end + 1);
- addr += PAGE_SIZE) {
- page = phys_to_page(addr);
- SetPageReserved(page);
- }
-#endif
-}
#else
static void __init reserve_crashkernel(void)
{
}
-
-static void __init kexec_reserve_crashkres_pages(void)
-{
-}
#endif /* CONFIG_KEXEC_CORE */
#ifdef CONFIG_CRASH_DUMP
@@ -586,8 +561,6 @@ void __init mem_init(void)
/* this will put all unused low memory onto the freelists */
memblock_free_all();
- kexec_reserve_crashkres_pages();
-
mem_init_print_info(NULL);
/*
--
2.17.2
