diff options
| author | Baolin Wang <baolin.wang@linux.alibaba.com> | 2024-08-20 17:49:15 +0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-09-03 21:15:39 -0700 |
| commit | dfa98f56d932fca3eaadaed8c17393fdfa00574d (patch) | |
| tree | 625a4724bd3aa50e0642414ee3f6be21fdf92337 | |
| parent | d6b8f296e8d74d685627fd746558745c13b8bd32 (diff) | |
mm: khugepaged: support shmem mTHP copy
Iterate each subpage in the large folio to copy, as preparation for
supporting shmem mTHP collapse.
Link: https://lkml.kernel.org/r/222d615b7c837eabb47a238126c5fdeff8aa5283.1724140601.git.baolin.wang@linux.alibaba.com
Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Barry Song <21cnbao@gmail.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Yang Shi <shy828301@gmail.com>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rw-r--r-- | mm/khugepaged.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/mm/khugepaged.c b/mm/khugepaged.c index e015c94eba09..4996f7487c13 100644 --- a/mm/khugepaged.c +++ b/mm/khugepaged.c @@ -2056,17 +2056,22 @@ xa_unlocked: index = start; dst = folio_page(new_folio, 0); list_for_each_entry(folio, &pagelist, lru) { + int i, nr_pages = folio_nr_pages(folio); + while (index < folio->index) { clear_highpage(dst); index++; dst++; } - if (copy_mc_highpage(dst, folio_page(folio, 0)) > 0) { - result = SCAN_COPY_MC; - goto rollback; + + for (i = 0; i < nr_pages; i++) { + if (copy_mc_highpage(dst, folio_page(folio, i)) > 0) { + result = SCAN_COPY_MC; + goto rollback; + } + index++; + dst++; } - index++; - dst++; } while (index < end) { clear_highpage(dst); |