diff options
| -rw-r--r-- | mm/huge_memory.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 86a30041a2e1..8f10afba17a6 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -2238,16 +2238,18 @@ static void __split_huge_pmd_locked(struct vm_area_struct *vma, pmd_t *pmd, entry = maybe_mkwrite(entry, vma); if (anon_exclusive) SetPageAnonExclusive(page + i); - if (!write) - entry = pte_wrprotect(entry); if (!young) entry = pte_mkold(entry); + /* NOTE: this may set soft-dirty too on some archs */ + if (dirty) + entry = pte_mkdirty(entry); /* - * NOTE: we don't do pte_mkdirty when dirty==true - * because it breaks sparc64 which can sigsegv - * random process. Need to revisit when we figure - * out what is special with sparc64. + * NOTE: this needs to happen after pte_mkdirty, + * because some archs (sparc64, loongarch) could + * set hw write bit when mkdirty. */ + if (!write) + entry = pte_wrprotect(entry); if (soft_dirty) entry = pte_mksoft_dirty(entry); if (uffd_wp) |