aboutsummaryrefslogtreecommitdiff
path: root/arch
diff options
context:
space:
mode:
authorPeter Zijlstra <a.p.zijlstra@chello.nl>2009-03-13 12:21:33 +0100
committerIngo Molnar <mingo@elte.hu>2009-04-06 09:29:37 +0200
commit7dd1fcc258b65da718f01e4684a7b9244501a9fb (patch)
tree4fb864f493b9f1d47bedbc3c97b9de7df572d6ec /arch
parent15dbf27cc18559a14e99609f78678aa86b9c6ff1 (diff)
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')
-rw-r--r--arch/powerpc/mm/fault.c3
-rw-r--r--arch/x86/mm/fault.c3
2 files changed, 6 insertions, 0 deletions
diff --git a/arch/powerpc/mm/fault.c b/arch/powerpc/mm/fault.c
index 76993941cac..eda5b0ca4af 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
diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index a03b7279efa..c8725752b6c 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -27,6 +27,7 @@
#include <linux/tty.h>
#include <linux/smp.h>
#include <linux/mm.h>
+#include <linux/perf_counter.h>
#include <asm-generic/sections.h>
@@ -1044,6 +1045,8 @@ do_page_fault(struct pt_regs *regs, unsigned long error_code)
if (unlikely(error_code & PF_RSVD))
pgtable_bad(regs, error_code, address);
+ perf_swcounter_event(PERF_COUNT_PAGE_FAULTS, 1, 0, regs);
+
/*
* If we're in an interrupt, have no user context or are running
* in an atomic region then we must not take the fault: