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Fixes: Commit 2aa6d036b7 ("mm: numa: avoid waiting on freed migrated pages")

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Commit 2aa6d036b7 ("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 82b0f8c39a
("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 11:09:10 -04:00
committed by Chris
parent bd75226732
commit 3607c18c95
1 changed files with 1 additions and 1 deletions
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2
mm/huge_memory.c
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@@ -1259,12 +1259,12 @@ int do_huge_pmd_numa_page(struct fault_env *fe, pmd_t pmd)
/* 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(fe->ptl);
wait_on_page_locked(page);
put_page(page);
page_nid = -1;
goto out;
}