From: Yisheng Xie <xieyisheng1@xxxxxxxxxx>
This patch is to extends soft offlining framework to support
non-lru page, which already support migration after
commit bda807d44454 ("mm: migrate: support non-lru movable page
migration")
When memory corrected errors occur on a non-lru movable page,
we can choose to stop using it by migrating data onto another
page and disable the original (maybe half-broken) one.
Signed-off-by: Yisheng Xie <xieyisheng1@xxxxxxxxxx>
Suggested-by: Michal Hocko <mhocko@xxxxxxxxxx>
Suggested-by: Minchan Kim <minchan@xxxxxxxxxx>
Reviewed-by: Minchan Kim <minchan@xxxxxxxxxx>
Acked-by: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
CC: Vlastimil Babka <vbabka@xxxxxxx>
---
mm/memory-failure.c | 26 ++++++++++++++++----------
1 file changed, 16 insertions(+), 10 deletions(-)
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index f283c7e..56e39f8 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -1527,7 +1527,8 @@ static int get_any_page(struct page *page, unsigned long pfn, int flags)
{
int ret = __get_any_page(page, pfn, flags);
- if (ret == 1 && !PageHuge(page) && !PageLRU(page)) {
+ if (ret == 1 && !PageHuge(page) &&
+ !PageLRU(page) && !__PageMovable(page)) {
/*
* Try to free it.
*/
@@ -1649,7 +1650,10 @@ static int __soft_offline_page(struct page *page, int flags)
* Try to migrate to a new page instead. migrate.c
* handles a large number of cases for us.
*/
- ret = isolate_lru_page(page);
+ if (PageLRU(page))
+ ret = isolate_lru_page(page);
+ else if (!isolate_movable_page(page, ISOLATE_UNEVICTABLE))
+ ret = -EBUSY;
/*
* Drop page reference which is came from get_any_page()
* successful isolate_lru_page() already took another one.
@@ -1657,18 +1661,20 @@ static int __soft_offline_page(struct page *page, int flags)
put_hwpoison_page(page);
if (!ret) {
LIST_HEAD(pagelist);
- inc_node_page_state(page, NR_ISOLATED_ANON +
- page_is_file_cache(page));
+ /*
+ * After isolated lru page, the PageLRU will be cleared,
+ * so use !__PageMovable instead for LRU page's mapping
+ * cannot have PAGE_MAPPING_MOVABLE.
+ */
+ if (!__PageMovable(page))
+ inc_node_page_state(page, NR_ISOLATED_ANON +
+ page_is_file_cache(page));
list_add(&page->lru, &pagelist);
ret = migrate_pages(&pagelist, new_page, NULL, MPOL_MF_MOVE_ALL,
MIGRATE_SYNC, MR_MEMORY_FAILURE);
if (ret) {
- if (!list_empty(&pagelist)) {
- list_del(&page->lru);
- dec_node_page_state(page, NR_ISOLATED_ANON +
- page_is_file_cache(page));
- putback_lru_page(page);
- }
+ if (!list_empty(&pagelist))
+ putback_movable_pages(&pagelist);
pr_info("soft offline: %#lx: migration failed %d, type %lx\n",
pfn, ret, page->flags);
--
1.9.1
--
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