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Fixes: Commit cdbf92675fad ("mm: numa: avoid waiting on freed migrated pages")

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Commit cdbf92675fad ("mm: numa: avoid waiting on freed migrated pages")
was an incomplete backport of the upstream commit.  It is necessary to
always reset page_nid before attempting any early exit.

The original commit conflicted due to lack of commit 82b0f8c39a38
("mm: join struct fault_env and vm_fault") in 4.9 so it wasn't a clean
application, and the change must have just gotten lost in the noise.

Signed-off-by: Chas Williams <chas3@att.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Chas Williams 2018-09-06 11:11:27 -04:00 committed by Greg Kroah-Hartman
parent a504227475
commit e72977e874
1 changed files with 1 additions and 1 deletions
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2
mm/huge_memory.c
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@ -1393,12 +1393,12 @@ int do_huge_pmd_numa_page(struct mm_struct *mm, struct vm_area_struct *vma,
/* Migration could have started since the pmd_trans_migrating check */
if (!page_locked) {
page_nid = -1;
if (!get_page_unless_zero(page))
goto out_unlock;
spin_unlock(ptl);
wait_on_page_locked(page);
put_page(page);
page_nid = -1;
goto out;
}