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authorDavid Hildenbrand <david@redhat.com>2023-12-20 23:44:28 +0100
committerAndrew Morton <akpm@linux-foundation.org>2023-12-29 11:58:48 -0800
commitebe2e35ec0f256372c158a18de459fb60070b313 (patch)
tree83ad314d721c02f1d3608413631f89c5b36f693b /mm/hugetlb.c
parent44887f39945519fa8405133b1acd098fda9c9746 (diff)
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.c3
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;