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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>
This commit is contained in:
Xiao Guangrong 2012-10-08 16:29:42 -07:00 committed by Linus Torvalds
parent 911891afe1
commit e060f0e013
1 changed files with 1 additions and 4 deletions
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5
mm/huge_memory.c
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@ -2333,11 +2333,8 @@ static int khugepaged(void *none)
set_freezable(); set_freezable();
set_user_nice(current, 19); set_user_nice(current, 19);
while (!kthread_should_stop()) { while (!kthread_should_stop())
VM_BUG_ON(khugepaged_thread != current);
khugepaged_loop(); khugepaged_loop();
VM_BUG_ON(khugepaged_thread != current);
}
spin_lock(&khugepaged_mm_lock); spin_lock(&khugepaged_mm_lock);
mm_slot = khugepaged_scan.mm_slot; mm_slot = khugepaged_scan.mm_slot;