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authorHugh Dickins <hughd@google.com>2021-09-03 00:54:27 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2021-09-03 19:58:11 +0300
commitb9e2faaf6fa0df984d4ecca775f3629a4d5e599b (patch)
treee90eadf77f2f55c3cc6b5ac3923eb7b19e7634ed /mm
parent2b5bbcb1c9c2cd05a06dcf54df77255a8c406a7b (diff)
downloadlinux-b9e2faaf6fa0df984d4ecca775f3629a4d5e599b.tar.xz
huge tmpfs: revert shmem's use of transhuge_vma_enabled()
5.14 commit e6be37b2e7bd ("mm/huge_memory.c: add missing read-only THP checking in transparent_hugepage_enabled()") added transhuge_vma_enabled() as a wrapper for two very different checks (one check is whether the app has marked its address range not to use THPs, the other check is whether the app is running in a hierarchy that has been marked never to use THPs). shmem_huge_enabled() prefers to show those two checks explicitly, as before. Link: https://lkml.kernel.org/r/45e5338-18d-c6f9-c17e-34f510bc1728@google.com Signed-off-by: Hugh Dickins <hughd@google.com> Reviewed-by: Yang Shi <shy828301@gmail.com> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Miaohe Lin <linmiaohe@huawei.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Mike Kravetz <mike.kravetz@oracle.com> Cc: Rik van Riel <riel@surriel.com> Cc: Shakeel Butt <shakeelb@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/shmem.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/mm/shmem.c b/mm/shmem.c
index 9403048f4ee1..43cb1a99f3ce 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -3987,7 +3987,8 @@ bool shmem_huge_enabled(struct vm_area_struct *vma)
loff_t i_size;
pgoff_t off;
- if (!transhuge_vma_enabled(vma, vma->vm_flags))
+ if ((vma->vm_flags & VM_NOHUGEPAGE) ||
+ test_bit(MMF_DISABLE_THP, &vma->vm_mm->flags))
return false;
if (shmem_huge == SHMEM_HUGE_FORCE)
return true;