From c313dc5dedbc9b51bb7a77959ffbda44712ac2e1 Mon Sep 17 00:00:00 2001
From: Weijie Yang <weijie.yang@samsung.com>
Date: Fri, 12 Dec 2014 16:55:07 -0800
Subject: [PATCH] mm: mincore: add hwpoison page handle
When the encountered pte is a swap entry, the current code handles two
cases: migration and normal swapentry, but we have a third case: hwpoison
page.
This patch adds hwpoison page handle, consider hwpoison page incore as
same as migration.
[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Weijie Yang <weijie.yang@samsung.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Mel Gorman <mgorman@suse.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Rik van Riel <riel@redhat.com>
Acked-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
mm/mincore.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/mm/mincore.c b/mm/mincore.c
index 725c809610483..c8c528b366419 100644
--- a/mm/mincore.c
+++ b/mm/mincore.c
@@ -137,8 +137,11 @@ static void mincore_pte_range(struct vm_area_struct *vma, pmd_t *pmd,
} else { /* pte is a swap entry */
swp_entry_t entry = pte_to_swp_entry(pte);
- if (is_migration_entry(entry)) {
- /* migration entries are always uptodate */
+ if (non_swap_entry(entry)) {
+ /*
+ * migration or hwpoison entries are always
+ * uptodate
+ */
*vec = 1;
} else {
#ifdef CONFIG_SWAP
--
GitLab