diff options
| author | Muchun Song <songmuchun@bytedance.com> | 2021-02-04 18:32:13 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-02-10 09:07:28 +0100 |
| commit | e8022991350347ec799a46ca1087dedf7853e541 (patch) | |
| tree | 9f9632294268f8f5172fba5ae678e8f19176affe /lib/clz_tab.c | |
| parent | c2e8bf377e31bf19e32cd0b846033126202878b9 (diff) | |
mm: hugetlb: remove VM_BUG_ON_PAGE from page_huge_active
commit ecbf4724e6061b4b01be20f6d797d64d462b2bc8 upstream.
The page_huge_active() can be called from scan_movable_pages() which do
not hold a reference count to the HugeTLB page. So when we call
page_huge_active() from scan_movable_pages(), the HugeTLB page can be
freed parallel. Then we will trigger a BUG_ON which is in the
page_huge_active() when CONFIG_DEBUG_VM is enabled. Just remove the
VM_BUG_ON_PAGE.
Link: https://lkml.kernel.org/r/20210115124942.46403-6-songmuchun@bytedance.com
Fixes: 7e1f049efb86 ("mm: hugetlb: cleanup using paeg_huge_active()")
Signed-off-by: Muchun Song <songmuchun@bytedance.com>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Reviewed-by: Oscar Salvador <osalvador@suse.de>
Cc: David Hildenbrand <david@redhat.com>
Cc: Yang Shi <shy828301@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'lib/clz_tab.c')
0 files changed, 0 insertions, 0 deletions