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    Subject[PATCH 24/25] mm/x86: Use mm_fault_accounting()
    Date
    Use the new mm_fault_accounting() helper for page fault accounting.

    CC: Dave Hansen <dave.hansen@linux.intel.com>
    CC: Andy Lutomirski <luto@kernel.org>
    CC: Peter Zijlstra <peterz@infradead.org>
    CC: Thomas Gleixner <tglx@linutronix.de>
    CC: Ingo Molnar <mingo@redhat.com>
    CC: Borislav Petkov <bp@alien8.de>
    CC: x86@kernel.org
    CC: H. Peter Anvin <hpa@zytor.com>
    Signed-off-by: Peter Xu <peterx@redhat.com>
    ---
    arch/x86/mm/fault.c | 10 +---------
    1 file changed, 1 insertion(+), 9 deletions(-)

    diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
    index a51df516b87b..28635b4e324c 100644
    --- a/arch/x86/mm/fault.c
    +++ b/arch/x86/mm/fault.c
    @@ -1365,8 +1365,6 @@ void do_user_addr_fault(struct pt_regs *regs,
    local_irq_enable();
    }

    - perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, address);
    -
    if (hw_error_code & X86_PF_WRITE)
    flags |= FAULT_FLAG_WRITE;
    if (hw_error_code & X86_PF_INSTR)
    @@ -1493,13 +1491,7 @@ void do_user_addr_fault(struct pt_regs *regs,
    * Major/minor page fault accounting. If any of the events
    * returned VM_FAULT_MAJOR, we account it as a major fault.
    */
    - if (major) {
    - tsk->maj_flt++;
    - perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MAJ, 1, regs, address);
    - } else {
    - tsk->min_flt++;
    - perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MIN, 1, regs, address);
    - }
    + mm_fault_accounting(tsk, regs, address, major);

    check_v8086_mode(regs, address, tsk);
    }
    --
    2.26.2
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