[S390] Wire up page fault events for software perf counters.
Heiko Carstens [Fri, 11 Sep 2009 08:29:06 +0000 (10:29 +0200)]
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

arch/s390/mm/fault.c

index e5e119f..1abbadd 100644 (file)
@@ -10,6 +10,7 @@
  *    Copyright (C) 1995  Linus Torvalds
  */
 
+#include <linux/perf_counter.h>
 #include <linux/signal.h>
 #include <linux/sched.h>
 #include <linux/kernel.h>
@@ -305,7 +306,7 @@ do_exception(struct pt_regs *regs, unsigned long error_code, int write)
         * interrupts again and then search the VMAs
         */
        local_irq_enable();
-
+       perf_swcounter_event(PERF_COUNT_SW_PAGE_FAULTS, 1, 0, regs, address);
        down_read(&mm->mmap_sem);
 
        si_code = SEGV_MAPERR;
@@ -363,11 +364,15 @@ good_area:
                }
                BUG();
        }
-       if (fault & VM_FAULT_MAJOR)
+       if (fault & VM_FAULT_MAJOR) {
                tsk->maj_flt++;
-       else
+               perf_swcounter_event(PERF_COUNT_SW_PAGE_FAULTS_MAJ, 1, 0,
+                                    regs, address);
+       } else {
                tsk->min_flt++;
-
+               perf_swcounter_event(PERF_COUNT_SW_PAGE_FAULTS_MIN, 1, 0,
+                                    regs, address);
+       }
         up_read(&mm->mmap_sem);
        /*
         * The instruction that caused the program check will