aboutsummaryrefslogtreecommitdiff
path: root/arch/s390/kernel/smp.c
diff options
context:
space:
mode:
authorMartin Schwidefsky <schwidefsky@de.ibm.com>2015-08-21 16:05:32 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2015-10-14 14:32:06 +0200
commitb5a6b71b1901b9ca495f669c9ad86f2181960aba (patch)
tree26279ca6f071672d96ac6713c7ce4997d84482de /arch/s390/kernel/smp.c
parent1ec2772e0c3ca3159035c03165355e355efc326b (diff)
downloadlinux-linaro-stable-b5a6b71b1901b9ca495f669c9ad86f2181960aba.tar.gz
s390/diag: add tracepoint for diagnose calls
To be able to analyse problems in regard to hypervisor overhead add a tracepoing for diagnose calls. It reports the number of the diagnose issued, e.g. sshd-1385 [002] .... 42.701431: diagnose: nr=0x9c <idle>-0 [001] ..s. 43.587528: diagnose: nr=0x9c Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/smp.c')
-rw-r--r--arch/s390/kernel/smp.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index f7db48b61dcf..dbd40d448294 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -377,11 +377,11 @@ int smp_vcpu_scheduled(int cpu)
void smp_yield_cpu(int cpu)
{
if (MACHINE_HAS_DIAG9C) {
- diag_stat_inc(DIAG_STAT_X09C);
+ diag_stat_inc_norecursion(DIAG_STAT_X09C);
asm volatile("diag %0,0,0x9c"
: : "d" (pcpu_devices[cpu].address));
} else if (MACHINE_HAS_DIAG44) {
- diag_stat_inc(DIAG_STAT_X044);
+ diag_stat_inc_norecursion(DIAG_STAT_X044);
asm volatile("diag 0,0,0x44");
}
}