The patch titled
Subject: memory-hotplug: update mce_bad_pages when removing the memory
has been removed from the -mm tree. Its filename was
memory-hotplug-update-mce_bad_pages-when-removing-the-memory.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Wen Congyang <wency@xxxxxxxxxxxxxx>
Subject: memory-hotplug: update mce_bad_pages when removing the memory
When we hotremove a memory device, we will free the memory to store struct
page. If the page is hwpoisoned page, we should decrease mce_bad_pages.
[akpm@xxxxxxxxxxxxxxxxxxxx: cleanup ifdefs]
Signed-off-by: Wen Congyang <wency@xxxxxxxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Jiang Liu <liuj97@xxxxxxxxx>
Cc: Len Brown <len.brown@xxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Christoph Lameter <cl@xxxxxxxxx>
Cc: Minchan Kim <minchan.kim@xxxxxxxxx>
Cc: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
Cc: Yasuaki Ishimatsu <isimatu.yasuaki@xxxxxxxxxxxxxx>
Cc: Dave Hansen <dave@xxxxxxxxxxxxxxxxxx>
Cc: Mel Gorman <mel@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/sparse.c | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff -puN mm/sparse.c~memory-hotplug-update-mce_bad_pages-when-removing-the-memory mm/sparse.c
--- a/mm/sparse.c~memory-hotplug-update-mce_bad_pages-when-removing-the-memory
+++ a/mm/sparse.c
@@ -771,6 +771,27 @@ out:
return ret;
}
+#ifdef CONFIG_MEMORY_FAILURE
+static void clear_hwpoisoned_pages(struct page *memmap, int nr_pages)
+{
+ int i;
+
+ if (!memmap)
+ return;
+
+ for (i = 0; i < PAGES_PER_SECTION; i++) {
+ if (PageHWPoison(&memmap[i])) {
+ atomic_long_sub(1, &mce_bad_pages);
+ ClearPageHWPoison(&memmap[i]);
+ }
+ }
+}
+#else
+static inline void clear_hwpoisoned_pages(struct page *memmap, int nr_pages)
+{
+}
+#endif
+
void sparse_remove_one_section(struct zone *zone, struct mem_section *ms)
{
struct page *memmap = NULL;
@@ -784,6 +805,7 @@ void sparse_remove_one_section(struct zo
ms->pageblock_flags = NULL;
}
+ clear_hwpoisoned_pages(memmap, PAGES_PER_SECTION);
free_section_usemap(memmap, usemap);
}
#endif
_
Patches currently in -mm which might be from wency@xxxxxxxxxxxxxx are
origin.patch
node_states-introduce-n_memory.patch
cpuset-use-n_memory-instead-n_high_memory.patch
procfs-use-n_memory-instead-n_high_memory.patch
memcontrol-use-n_memory-instead-n_high_memory.patch
oom-use-n_memory-instead-n_high_memory.patch
mmmigrate-use-n_memory-instead-n_high_memory.patch
mempolicy-use-n_memory-instead-n_high_memory.patch
hugetlb-use-n_memory-instead-n_high_memory.patch
vmstat-use-n_memory-instead-n_high_memory.patch
kthread-use-n_memory-instead-n_high_memory.patch
init-use-n_memory-instead-n_high_memory.patch
vmscan-use-n_memory-instead-n_high_memory.patch
page_alloc-use-n_memory-instead-n_high_memory-change-the-node_states-initialization.patch
hotplug-update-nodemasks-management.patch
hotplug-update-nodemasks-management-fix.patch
numa-add-config_movable_node-for-movable-dedicated-node.patch
numa-add-config_movable_node-for-movable-dedicated-node-fix.patch
memory_hotplug-allow-online-offline-memory-to-result-movable-node.patch
mm-introduce-new-field-managed_pages-to-struct-zone.patch
mm-provide-more-accurate-estimation-of-pages-occupied-by-memmap.patch
mm-provide-more-accurate-estimation-of-pages-occupied-by-memmap-fix.patch
linux-next.patch
x86-numa-dont-check-if-node-is-numa_no_node.patch
x86-fix-the-argument-passed-to-sync_global_pgds.patch
x86-make-mem=-option-to-work-for-efi-platform.patch
documentation-kernel-parameterstxt-update-mem=-options-spec-according-to-its-implementation.patch
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