On x86 platform, if we use "/sys/devices/system/memory/soft_offline_page" to
offline a
free page twice, the value of mce_bad_pages will be added twice. So this is an
error,
since the page was already marked HWPoison, we should skip the page and don't
add the
value of mce_bad_pages.
$ cat /proc/meminfo | grep HardwareCorrupted
soft_offline_page()
get_any_page()
atomic_long_add(1, &mce_bad_pages)
Signed-off-by: Xishi Qiu <[email protected]>
Signed-off-by: Jiang Liu <[email protected]>
---
mm/memory-failure.c | 7 +++++--
1 files changed, 5 insertions(+), 2 deletions(-)
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 8b20278..de760ca 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -1582,8 +1582,11 @@ int soft_offline_page(struct page *page, int flags)
return ret;
done:
- atomic_long_add(1, &mce_bad_pages);
- SetPageHWPoison(page);
/* keep elevated page count for bad page */
+ if (!PageHWPoison(page)) {
+ atomic_long_add(1, &mce_bad_pages);
+ SetPageHWPoison(page);
+ }
+
return ret;
}
--
1.7.6.1
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