diff options
Diffstat (limited to 'arch/x86/kernel')
| -rw-r--r-- | arch/x86/kernel/process_32.c | 11 | ||||
| -rw-r--r-- | arch/x86/kernel/process_64.c | 11 |
2 files changed, 22 insertions, 0 deletions
diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c index 9663c2a7483..46d391d49de 100644 --- a/arch/x86/kernel/process_32.c +++ b/arch/x86/kernel/process_32.c @@ -204,6 +204,10 @@ void cpu_idle(void) } } +static void do_nothing(void *unused) +{ +} + void cpu_idle_wait(void) { unsigned int cpu, this_cpu = get_cpu(); @@ -228,6 +232,13 @@ void cpu_idle_wait(void) cpu_clear(cpu, map); } cpus_and(map, map, cpu_online_map); + /* + * We waited 1 sec, if a CPU still did not call idle + * it may be because it is in idle and not waking up + * because it has nothing to do. + * Give all the remaining CPUS a kick. + */ + smp_call_function_mask(map, do_nothing, 0, 0); } while (!cpus_empty(map)); set_cpus_allowed(current, tmp); diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c index 6309b275cb9..ab79e1dfa02 100644 --- a/arch/x86/kernel/process_64.c +++ b/arch/x86/kernel/process_64.c @@ -135,6 +135,10 @@ static void poll_idle (void) cpu_relax(); } +static void do_nothing(void *unused) +{ +} + void cpu_idle_wait(void) { unsigned int cpu, this_cpu = get_cpu(); @@ -160,6 +164,13 @@ void cpu_idle_wait(void) cpu_clear(cpu, map); } cpus_and(map, map, cpu_online_map); + /* + * We waited 1 sec, if a CPU still did not call idle + * it may be because it is in idle and not waking up + * because it has nothing to do. + * Give all the remaining CPUS a kick. + */ + smp_call_function_mask(map, do_nothing, 0, 0); } while (!cpus_empty(map)); set_cpus_allowed(current, tmp); |