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| author |   Anna-Maria Gleixner <anna-maria@linutronix.de> | 2016-03-11 11:52:38 +0100 |
|---|---|---|
| committer |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2016-03-17 13:18:24 +0100 |
| commit | 1e3c1dd15dd30232458e35128fd062b788b1c9e4 (patch) | |
| tree | f1fec7646a9d163ec09b1950f03ad17474232cbf /arch/s390 | |
| parent | s390/cpum_cf: Fix missing cpu hotplug notifier transition (diff) | |
| download | linux-dev-1e3c1dd15dd30232458e35128fd062b788b1c9e4.tar.xz linux-dev-1e3c1dd15dd30232458e35128fd062b788b1c9e4.zip | |
s390/cpum_sf: Fix cpu hotplug notifier transitions
The cpumf_pmu_notfier() hotplug callback lacks handling of the
CPU_DOWN_FAILED case. That means, if CPU_DOWN_PREPARE failes, the PMC
of the CPU is not setup again. Furthermore the CPU_ONLINE_FROZEN case
will never be processed because of masking the switch expression with
CPU_TASKS_FROZEN.
Add handling for CPU_DOWN_FAILED transition to setup the PMC of the
CPU. Remove CPU_ONLINE_FROZEN case.
Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de>
Acked-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/kernel/perf_cpum_sf.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/s390/kernel/perf_cpum_sf.c b/arch/s390/kernel/perf_cpum_sf.c index 1a43474df541..eaab9a7cb3be 100644 --- a/arch/s390/kernel/perf_cpum_sf.c +++ b/arch/s390/kernel/perf_cpum_sf.c @@ -1521,7 +1521,7 @@ static int cpumf_pmu_notifier(struct notifier_block *self, switch (action & ~CPU_TASKS_FROZEN) { case CPU_ONLINE: - case CPU_ONLINE_FROZEN: + case CPU_DOWN_FAILED: flags = PMC_INIT; smp_call_function_single(cpu, setup_pmc_cpu, &flags, 1); break; |