Prevent returning a pfn outside the target zone in case that not aligned with pageblock boundary. Otherwise isolate_migratepages_block() would handle pages not in the target zone. Signed-off-by: Rei Yamamoto <yamamoto.rei@xxxxxxxxxxxxxx> --- mm/compaction.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/mm/compaction.c b/mm/compaction.c index fe915db6149b..de42b8e48758 100644 --- a/mm/compaction.c +++ b/mm/compaction.c @@ -1858,6 +1858,8 @@ static unsigned long fast_find_migrateblock(struct compact_control *cc) update_fast_start_pfn(cc, free_pfn); pfn = pageblock_start_pfn(free_pfn); + if (pfn < cc->zone->zone_start_pfn) + pfn = cc->zone->zone_start_pfn; cc->fast_search_fail = 0; found_block = true; set_pageblock_skip(freepage); -- 2.27.0
