The patch titled
Date: kernel/power: allow hibernation with page_poison sanity checking-fix
has been added to the -mm tree. Its filename is
kernel-power-allow-hibernation-with-page_poison-sanity-checking-fix.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/kernel-power-allow-hibernation-with-page_poison-sanity-checking-fix.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/kernel-power-allow-hibernation-with-page_poison-sanity-checking-fix.patch
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------------------------------------------------------
From: Vlastimil Babka <vbabka@xxxxxxx>
Date: kernel/power: allow hibernation with page_poison sanity checking-fix
Adapt to __kernel_unpoison_pages fixup. Split out
clear_or_poison_free_page() per David Hildenbrand.
Link: https://lkml.kernel.org/r/7811e5ec-c7ae-09a9-7f90-45e14956c4c4@xxxxxxx
Signed-off-by: Vlastimil Babka <vbabka@xxxxxxx>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/mm.h | 1 +
kernel/power/snapshot.c | 18 ++++++++++--------
2 files changed, 11 insertions(+), 8 deletions(-)
--- a/include/linux/mm.h~kernel-power-allow-hibernation-with-page_poison-sanity-checking-fix
+++ a/include/linux/mm.h
@@ -2871,6 +2871,7 @@ static inline bool page_poisoning_enable
#else
static inline bool page_poisoning_enabled(void) { return false; }
static inline bool page_poisoning_enabled_static(void) { return false; }
+static inline void __kernel_poison_pages(struct page *page, int nunmpages) { }
static inline void kernel_poison_pages(struct page *page, int numpages) { }
static inline void kernel_unpoison_pages(struct page *page, int numpages) { }
#endif
--- a/kernel/power/snapshot.c~kernel-power-allow-hibernation-with-page_poison-sanity-checking-fix
+++ a/kernel/power/snapshot.c
@@ -1178,6 +1178,14 @@ void free_basic_memory_bitmaps(void)
pr_debug("Basic memory bitmaps freed\n");
}
+static void clear_or_poison_free_page(struct page *page)
+{
+ if (page_poisoning_enabled_static())
+ __kernel_poison_pages(page, 1);
+ else if (want_init_on_free())
+ clear_highpage(page);
+}
+
void clear_or_poison_free_pages(void)
{
struct memory_bitmap *bm = free_pages_map;
@@ -1190,14 +1198,8 @@ void clear_or_poison_free_pages(void)
memory_bm_position_reset(bm);
pfn = memory_bm_next_pfn(bm);
while (pfn != BM_END_OF_MAP) {
- if (pfn_valid(pfn)) {
- struct page *page = pfn_to_page(pfn);
- if (page_poisoning_enabled_static())
- kernel_poison_pages(page, 1);
- else if (want_init_on_free())
- clear_highpage(page);
-
- }
+ if (pfn_valid(pfn))
+ clear_or_poison_free_page(pfn_to_page(pfn));
pfn = memory_bm_next_pfn(bm);
}
_
Patches currently in -mm which might be from vbabka@xxxxxxx are
mm-slub-use-kmem_cache_debug_flags-in-deactivate_slab.patch
mm-page_alloc-do-not-rely-on-the-order-of-page_poison-and-init_on_alloc-free-parameters.patch
mm-page_poison-use-static-key-more-efficiently.patch
kernel-power-allow-hibernation-with-page_poison-sanity-checking.patch
kernel-power-allow-hibernation-with-page_poison-sanity-checking-fix.patch
mm-page_poison-remove-config_page_poisoning_no_sanity.patch
mm-page_poison-remove-config_page_poisoning_zero.patch
