We don't need to grab a page_table_lock when we try to release a page.
So, defer to grab a page_table_lock.
Reviewed-by: Naoya Horiguchi <n-horigu...@ah.jp.nec.com>
Signed-off-by: Joonsoo Kim <iamjoonsoo....@lge.com>
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index c017c52..6c8eec2 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -2627,10 +2627,11 @@ retry_avoidcopy:
}
spin_unlock(&mm->page_table_lock);
mmu_notifier_invalidate_range_end(mm, mmun_start, mmun_end);
- /* Caller expects lock to be held */
- spin_lock(&mm->page_table_lock);
page_cache_release(new_page);
page_cache_release(old_page);
+
+ /* Caller expects lock to be held */
+ spin_lock(&mm->page_table_lock);
return 0;
}
--
1.7.9.5
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