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| author |  David Hildenbrand <david@redhat.com>
| 2023-12-20 23:44:28 +0100 |
|---|---|---|
| committer |  Andrew Morton <akpm@linux-foundation.org>
| 2023-12-29 11:58:48 -0800 |
| commit | ebe2e35ec0f256372c158a18de459fb60070b313 (patch) | |
| tree | 83ad314d721c02f1d3608413631f89c5b36f693b /mm/hugetlb.c | |
| parent | mm/rmap: introduce and use hugetlb_add_file_rmap() (diff) | |
| download | linux-ebe2e35ec0f256372c158a18de459fb60070b313.tar.gz linux-ebe2e35ec0f256372c158a18de459fb60070b313.tar.bz2 linux-ebe2e35ec0f256372c158a18de459fb60070b313.zip | |
mm/rmap: introduce and use hugetlb_try_dup_anon_rmap()
hugetlb rmap handling differs quite a lot from "ordinary" rmap code. For
example, hugetlb currently only supports entire mappings, and treats any
mapping as mapped using a single "logical PTE". Let's move it out of the
way so we can overhaul our "ordinary" rmap. implementation/interface.
So let's introduce and use hugetlb_try_dup_anon_rmap() to make all hugetlb
handling use dedicated hugetlb_* rmap functions.
Add sanity checks that we end up with the right folios in the right
functions.
Note that is_device_private_page() does not apply to hugetlb.
Link: https://lkml.kernel.org/r/20231220224504.646757-5-david@redhat.com
Signed-off-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Yin Fengwei <fengwei.yin@intel.com>
Reviewed-by: Ryan Roberts <ryan.roberts@arm.com>
Reviewed-by: Muchun Song <songmuchun@bytedance.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Peter Xu <peterx@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/hugetlb.c')
| -rw-r--r-- | mm/hugetlb.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 57e898187931..378e460a6ab4 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -5409,8 +5409,7 @@ again: */ if (!folio_test_anon(pte_folio)) { hugetlb_add_file_rmap(pte_folio); - } else if (page_try_dup_anon_rmap(&pte_folio->page, - true, src_vma)) { + } else if (hugetlb_try_dup_anon_rmap(pte_folio, src_vma)) { pte_t src_pte_old = entry; struct folio *new_folio; |