The patch titled
Subject: memory-hotplug: update mce_bad_pages when removing the memory
has been added to the -mm tree. Its filename is
memory-hotplug-update-mce_bad_pages-when-removing-the-memory.patch
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------------------------------------------------------
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.
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 | 21 +++++++++++++++++++++
1 file changed, 21 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
@@ -773,6 +773,23 @@ 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]);
+ }
+ }
+}
+#endif
+
void sparse_remove_one_section(struct zone *zone, struct mem_section *ms)
{
struct page *memmap = NULL;
@@ -786,6 +803,10 @@ void sparse_remove_one_section(struct zo
ms->pageblock_flags = NULL;
}
+#ifdef CONFIG_MEMORY_FAILURE
+ clear_hwpoisoned_pages(memmap, PAGES_PER_SECTION);
+#endif
+
free_section_usemap(memmap, usemap);
}
#endif
_
Patches currently in -mm which might be from wency@xxxxxxxxxxxxxx are
cpu_hotplug-unmap-cpu2node-when-the-cpu-is-hotremoved.patch
cpu_hotplug-unmap-cpu2node-when-the-cpu-is-hotremoved-fix.patch
acpi_memhotplugc-fix-memory-leak-when-memory-device-is-unbound-from-the-module-acpi_memhotplug.patch
acpi_memhotplugc-free-memory-device-if-acpi_memory_enable_device-failed.patch
acpi_memhotplugc-remove-memory-info-from-list-before-freeing-it.patch
acpi_memhotplugc-dont-allow-to-eject-the-memory-device-if-it-is-being-used.patch
acpi_memhotplugc-bind-the-memory-device-when-the-driver-is-being-loaded.patch
acpi_memhotplugc-auto-bind-the-memory-device-which-is-hotplugged-before-the-driver-is-loaded.patch
x86-numa-dont-check-if-node-is-numa_no_node.patch
memory-hotplug-suppress-device-memoryx-does-not-have-a-release-function-warning.patch
memory-hotplug-suppress-device-nodex-does-not-have-a-release-function-warning.patch
memory-hotplug-skip-hwpoisoned-page-when-offlining-pages.patch
memory-hotplug-update-mce_bad_pages-when-removing-the-memory.patch
memory-hotplug-update-mce_bad_pages-when-removing-the-memory-fix.patch
memory-hotplug-auto-offline-page_cgroup-when-onlining-memory-block-failed.patch
memory-hotplug-fix-nr_free_pages-mismatch.patch
memory-hotplug-allocate-zones-pcp-before-onlining-pages.patch
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