Commit e060f0e0 authored Oct 08, 2012 by Xiao Guangrong Committed by Linus Torvalds Oct 09, 2012

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>

parent 911891af

mm/huge_memory.c

+1 −4

Original line number	Diff line number	Diff line
		@@ -2333,11 +2333,8 @@ static int khugepaged(void *none)
		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;