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| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2015-08-21 17:05:32 +0300 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2015-10-14 15:32:06 +0300 |
| commit | b5a6b71b1901b9ca495f669c9ad86f2181960aba (patch) | |
| tree | 26279ca6f071672d96ac6713c7ce4997d84482de /arch/s390/kernel/smp.c | |
| parent | 1ec2772e0c3ca3159035c03165355e355efc326b (diff) | |
| download | linux-b5a6b71b1901b9ca495f669c9ad86f2181960aba.tar.xz | |
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.c | 4 |
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"); } } |