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Commit bde69af2 authored by Heiko Carstens's avatar Heiko Carstens Committed by Martin Schwidefsky
Browse files

[S390] Wire up page fault events for software perf counters. 



Signed-off-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent 5c0b912e

arch/s390/mm/fault.c

+9 −4
Original line number Diff line number Diff line
@@ -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