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Howlett" , Nico Pache , Ryan Roberts , Dev Jain , Barry Song , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Shuah Khan , linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: Re: [PATCH 2/4] mm/huge_memory: move to next folio after folio_split() succeeds. 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This is a preparation patch to= >> allow more precise split_huge_page_test check in an upcoming commit. >> >> split_folio_to_order() part is not changed, since split_pte_mapped_thp= test >> relies on its current behavior. >> >> Signed-off-by: Zi Yan >> --- >> mm/huge_memory.c | 18 +++++++++++------- >> 1 file changed, 11 insertions(+), 7 deletions(-) >> >> diff --git a/mm/huge_memory.c b/mm/huge_memory.c >> index 8a11c2d402d4..b2ce8ac0c5a9 100644 >> --- a/mm/huge_memory.c >> +++ b/mm/huge_memory.c >> @@ -4341,6 +4341,7 @@ static int split_huge_pages_pid(int pid, unsigne= d long vaddr_start, >> struct folio *folio; >> struct address_space *mapping; >> unsigned int target_order =3D new_order; >> + long nr_pages; >> >> if (!vma) >> break; >> @@ -4358,6 +4359,8 @@ static int split_huge_pages_pid(int pid, unsigne= d long vaddr_start, >> if (!is_transparent_hugepage(folio)) >> goto next; >> >> + nr_pages =3D folio_nr_pages(folio); >> + > > Could be folio_large_nr_pages()? Sure. > >> if (!folio_test_anon(folio)) { >> mapping =3D folio->mapping; >> target_order =3D max(new_order, >> @@ -4385,15 +4388,16 @@ static int split_huge_pages_pid(int pid, unsig= ned long vaddr_start, >> if (!folio_test_anon(folio) && folio->mapping !=3D mapping) >> goto unlock; >> >> - if (in_folio_offset < 0 || >> - in_folio_offset >=3D folio_nr_pages(folio)) { >> + if (in_folio_offset < 0 || in_folio_offset >=3D nr_pages) { >> if (!split_folio_to_order(folio, target_order)) >> split++; >> } else { >> - struct page *split_at =3D folio_page(folio, >> - in_folio_offset); >> - if (!folio_split(folio, target_order, split_at, NULL)) >> + struct page *split_at =3D >> + folio_page(folio, in_folio_offset); >> + if (!folio_split(folio, target_order, split_at, NULL)) { >> split++; >> + addr +=3D PAGE_SIZE * nr_pages; >> + } >> } >> >> unlock: >> @@ -4438,8 +4442,8 @@ static int split_huge_pages_in_file(const char *= file_path, pgoff_t off_start, >> if (IS_ERR(candidate)) >> goto out; >> >> - pr_debug("split file-backed THPs in file: %s, page offset: [0x%lx - = 0x%lx]\n", >> - file_path, off_start, off_end); >> + pr_debug("split file-backed THPs in file: %s, page offset: [0x%lx - = 0x%lx], new_order %u in_folio_offset %ld\n", >> + file_path, off_start, off_end, new_order, in_folio_offset); >> > > How about move this part into patch 1? Sure. I missed it. Thanks. > >> mapping =3D candidate->f_mapping; >> min_order =3D mapping_min_folio_order(mapping); >> -- = >> 2.47.2 >> > > -- = > Wei Yang > Help you, Help me -- Best Regards, Yan, Zi