The patch titled
Subject: mm/memory_hotplug: make HWPoisoned dirty swapcache pages unmovable
has been removed from the -mm tree. Its filename was
mm-memory_hotplug-make-hwpoisoned-dirty-swapcache-pages-unmovable.patch
This patch was dropped because it was nacked
------------------------------------------------------
From: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Subject: mm/memory_hotplug: make HWPoisoned dirty swapcache pages unmovable
HWPoisoned dirty swapcache pages are kept for killing owner processes. We
should not offline these pages or do_swap_page() would access the offline
pages and lead to bad ending.
Link: https://lkml.kernel.org/r/20210821094246.10149-4-linmiaohe@xxxxxxxxxx
Signed-off-by: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Cc: Chris Goldsworthy <cgoldswo@xxxxxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxx>
Cc: Minchan Kim <minchan@xxxxxxxxxx>
Cc: Naoya Horiguchi <naoya.horiguchi@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memory_hotplug.c | 6 ++++++
1 file changed, 6 insertions(+)
--- a/mm/memory_hotplug.c~mm-memory_hotplug-make-hwpoisoned-dirty-swapcache-pages-unmovable
+++ a/mm/memory_hotplug.c
@@ -1656,6 +1656,12 @@ static int scan_movable_pages(unsigned l
*/
if (PageOffline(page) && page_count(page))
return -EBUSY;
+ /*
+ * HWPoisoned dirty swapcache pages are definitely unmovable
+ * because they are kept for killing owner processes.
+ */
+ if (PageHWPoison(page) && PageSwapCache(page))
+ return -EBUSY;
if (!PageHuge(page))
continue;
_
Patches currently in -mm which might be from linmiaohe@xxxxxxxxxx are
mm-page_allocc-remove-meaningless-vm_bug_on-in-pindex_to_order.patch
mm-page_allocc-simplify-the-code-by-using-macro-k.patch
mm-page_allocc-fix-obsolete-comment-in-free_pcppages_bulk.patch
mm-page_allocc-use-helper-function-zone_spans_pfn.patch
mm-page_allocc-avoid-allocating-highmem-pages-via-alloc_pages_exact.patch
mm-page_isolation-fix-potential-missing-call-to-unset_migratetype_isolate.patch
mm-page_isolation-guard-against-possible-putback-unisolated-page.patch
mm-zsmallocc-close-race-window-between-zs_pool_dec_isolated-and-zs_unregister_migration.patch
mm-zsmallocc-combine-two-atomic-ops-in-zs_pool_dec_isolated.patch
