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authorMax Filippov <jcmvbkbc@gmail.com>2015-06-04 13:42:22 +0300
committerMax Filippov <jcmvbkbc@gmail.com>2015-08-17 07:33:26 +0300
commitaf885de869a9d7086d50a2c250323f0bfd939fd4 (patch)
tree4a0b6f7e09e27dcb9a45ea00482eed26679ad9c0 /arch/xtensa
parentae0b7139ab49c986e798ca9a46b7ad763ea8b8ca (diff)
downloadlinux-linaro-stable-af885de869a9d7086d50a2c250323f0bfd939fd4.tar.gz
xtensa: count software page fault perf events
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Diffstat (limited to 'arch/xtensa')
-rw-r--r--arch/xtensa/mm/fault.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/xtensa/mm/fault.c b/arch/xtensa/mm/fault.c
index 83a44a33cfa1..c9784c1b18d8 100644
--- a/arch/xtensa/mm/fault.c
+++ b/arch/xtensa/mm/fault.c
@@ -15,6 +15,7 @@
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/hardirq.h>
+#include <linux/perf_event.h>
#include <linux/uaccess.h>
#include <asm/mmu_context.h>
#include <asm/cacheflush.h>
@@ -142,6 +143,12 @@ good_area:
}
up_read(&mm->mmap_sem);
+ perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, address);
+ if (flags & VM_FAULT_MAJOR)
+ perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MAJ, 1, regs, address);
+ else if (flags & VM_FAULT_MINOR)
+ perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MIN, 1, regs, address);
+
return;
/* Something tried to access memory that isn't in our memory map..