perf_counter: allow for data addresses to be recorded
Paul suggested we allow for data addresses to be recorded along with
the traditional IPs as power can provide these.
For now, only the software pagefault events provide data addresses,
but in the future power might as well for some events.
x86 doesn't seem capable of providing this atm.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
LKML-Reference: <20090408130409.394816925@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index f2d3324..6f9df2b 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -1045,7 +1045,7 @@
if (unlikely(error_code & PF_RSVD))
pgtable_bad(regs, error_code, address);
- perf_swcounter_event(PERF_COUNT_PAGE_FAULTS, 1, 0, regs);
+ perf_swcounter_event(PERF_COUNT_PAGE_FAULTS, 1, 0, regs, address);
/*
* If we're in an interrupt, have no user context or are running
@@ -1142,10 +1142,12 @@
if (fault & VM_FAULT_MAJOR) {
tsk->maj_flt++;
- perf_swcounter_event(PERF_COUNT_PAGE_FAULTS_MAJ, 1, 0, regs);
+ perf_swcounter_event(PERF_COUNT_PAGE_FAULTS_MAJ, 1, 0,
+ regs, address);
} else {
tsk->min_flt++;
- perf_swcounter_event(PERF_COUNT_PAGE_FAULTS_MIN, 1, 0, regs);
+ perf_swcounter_event(PERF_COUNT_PAGE_FAULTS_MIN, 1, 0,
+ regs, address);
}
check_v8086_mode(regs, address, tsk);