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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2009-03-13 14:21:33 +0300
committerIngo Molnar <mingo@elte.hu>2009-04-06 11:29:37 +0400
commit7dd1fcc258b65da718f01e4684a7b9244501a9fb (patch)
tree4fb864f493b9f1d47bedbc3c97b9de7df572d6ec /arch/powerpc/mm/fault.c
parent15dbf27cc18559a14e99609f78678aa86b9c6ff1 (diff)
downloadlinux-7dd1fcc258b65da718f01e4684a7b9244501a9fb.tar.xz
perf_counter: provide pagefault software events
We use the generic software counter infrastructure to provide page fault events. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/powerpc/mm/fault.c')
-rw-r--r--arch/powerpc/mm/fault.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/powerpc/mm/fault.c b/arch/powerpc/mm/fault.c
index 76993941cac9..eda5b0ca4af2 100644
--- a/arch/powerpc/mm/fault.c
+++ b/arch/powerpc/mm/fault.c
@@ -29,6 +29,7 @@
#include <linux/module.h>
#include <linux/kprobes.h>
#include <linux/kdebug.h>
+#include <linux/perf_counter.h>
#include <asm/firmware.h>
#include <asm/page.h>
@@ -170,6 +171,8 @@ int __kprobes do_page_fault(struct pt_regs *regs, unsigned long address,
die("Weird page fault", regs, SIGSEGV);
}
+ perf_swcounter_event(PERF_COUNT_PAGE_FAULTS, 1, 0, regs);
+
/* When running in the kernel we expect faults to occur only to
* addresses in user space. All other faults represent errors in the
* kernel and should generate an OOPS. Unfortunately, in the case of an