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mm/khugepaged: continue to collapse on SCAN_PMD_NONE

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SCAN_PMD_NONE means current pmd is empty, but we can still continue
collapse next pmd range.

Link: https://lkml.kernel.org/r/20251114030028.7035-3-richard.weiyang@gmail.com
Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Reviewed-by: Lance Yang <lance.yang@linux.dev>
Reviewed-by: Dev Jain <dev.jain@arm.com>
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Acked-by: David Hildenbrand (Red Hat) <david@kernel.org>
Cc: Barry Song <baohua@kernel.org>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Nico Pache <npache@redhat.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Wei Yang
2025-11-14 03:00:27 +00:00
committed by Andrew Morton
parent eaa4c8063f
commit f1040f8898
1 changed files with 1 additions and 0 deletions
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mm/khugepaged.c
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@@ -2833,6 +2833,7 @@ handle_result:
goto handle_result;
/* Whitelisted set of results where continuing OK */
case SCAN_PMD_NULL:
case SCAN_PMD_NONE:
case SCAN_PTE_NON_PRESENT:
case SCAN_PTE_UFFD_WP:
case SCAN_LACK_REFERENCED_PAGE: