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Diffstat (limited to 'mm/memory-failure.c')
-rw-r--r--mm/memory-failure.c38
1 files changed, 17 insertions, 21 deletions
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index c6e4dd3e1c0..1a9242c5331 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -1419,18 +1419,17 @@ static int soft_offline_huge_page(struct page *page, int flags)
unsigned long pfn = page_to_pfn(page);
struct page *hpage = compound_head(page);
+ if (PageHWPoison(hpage)) {
+ pr_info("soft offline: %#lx hugepage already poisoned\n", pfn);
+ return -EBUSY;
+ }
+
ret = get_any_page(page, pfn, flags);
if (ret < 0)
return ret;
if (ret == 0)
goto done;
- if (PageHWPoison(hpage)) {
- put_page(hpage);
- pr_info("soft offline: %#lx hugepage already poisoned\n", pfn);
- return -EBUSY;
- }
-
/* Keep page count to indicate a given hugepage is isolated. */
ret = migrate_huge_page(hpage, new_page, MPOL_MF_MOVE_ALL, false,
MIGRATE_SYNC);
@@ -1441,12 +1440,11 @@ static int soft_offline_huge_page(struct page *page, int flags)
return ret;
}
done:
- if (!PageHWPoison(hpage))
- atomic_long_add(1 << compound_trans_order(hpage),
- &mce_bad_pages);
+ /* keep elevated page count for bad page */
+ atomic_long_add(1 << compound_trans_order(hpage), &mce_bad_pages);
set_page_hwpoison_huge_page(hpage);
dequeue_hwpoisoned_huge_page(hpage);
- /* keep elevated page count for bad page */
+
return ret;
}
@@ -1488,6 +1486,11 @@ int soft_offline_page(struct page *page, int flags)
}
}
+ if (PageHWPoison(page)) {
+ pr_info("soft offline: %#lx page already poisoned\n", pfn);
+ return -EBUSY;
+ }
+
ret = get_any_page(page, pfn, flags);
if (ret < 0)
return ret;
@@ -1519,19 +1522,11 @@ int soft_offline_page(struct page *page, int flags)
return -EIO;
}
- lock_page(page);
- wait_on_page_writeback(page);
-
/*
* Synchronized using the page lock with memory_failure()
*/
- if (PageHWPoison(page)) {
- unlock_page(page);
- put_page(page);
- pr_info("soft offline: %#lx page already poisoned\n", pfn);
- return -EBUSY;
- }
-
+ lock_page(page);
+ wait_on_page_writeback(page);
/*
* Try to invalidate first. This should work for
* non dirty unmapped page cache pages.
@@ -1583,8 +1578,9 @@ int soft_offline_page(struct page *page, int flags)
return ret;
done:
+ /* keep elevated page count for bad page */
atomic_long_add(1, &mce_bad_pages);
SetPageHWPoison(page);
- /* keep elevated page count for bad page */
+
return ret;
}