diff options
| author | Miaohe Lin <linmiaohe@huawei.com> | 2022-07-04 21:22:00 +0800 |
|---|---|---|
| committer | akpm <akpm@linux-foundation.org> | 2022-07-17 17:14:46 -0700 |
| commit | cea3332808f92c0120fb0b157c56d48639e0c713 (patch) | |
| tree | 52a10515ade5a20f50b347bd26ea2d842d472147 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | d764afedfb04e4eaf04b175c5ac54ffa4a423070 (diff) | |
mm/huge_memory: comment the subtly logic in __split_huge_pmd
It's dangerous and wrong to call page_folio(pmd_page(*pmd)) when pmd isn't
present. But the caller guarantees pmd is present when folio is set. So we
should be safe here. Add comment to make it clear.
Link: https://lkml.kernel.org/r/20220704132201.14611-16-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Muchun Song <songmuchun@bytedance.com>
Cc: Yang Shi <shy828301@gmail.com>
Cc: Zach O'Keefe <zokeefe@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions