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    Subject[PATCH 04/12] 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>
    ---
    mm/huge_memory.c | 5 +----
    1 files changed, 1 insertions(+), 4 deletions(-)

    diff --git a/mm/huge_memory.c b/mm/huge_memory.c
    index 3715c52..b218700 100644
    --- a/mm/huge_memory.c
    +++ b/mm/huge_memory.c
    @@ -2348,11 +2348,8 @@ 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;
    --
    1.7.7.6


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