thp: remove unnecessary khugepaged_thread check
Now, khugepaged creation and cancel are completely serial under the
protection of khugepaged_mutex, it is impossible that many khugepaged
entities are running
Signed-off-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 0931b2b..46e3f15 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -2333,11 +2333,8 @@
set_freezable();
set_user_nice(current, 19);
- while (!kthread_should_stop()) {
- VM_BUG_ON(khugepaged_thread != current);
+ while (!kthread_should_stop())
khugepaged_loop();
- VM_BUG_ON(khugepaged_thread != current);
- }
spin_lock(&khugepaged_mm_lock);
mm_slot = khugepaged_scan.mm_slot;