In pseries_dedicated_idle_sleep(), if we need to exit idle during the
snooze period (i.e. need_resched or cpu has been offlined), then we should
re-disable the interrupts and clear TIF_POLLING_NRFLAG before leaving.
Signed-off-by: Sebastien Dugue <[EMAIL PROTECTED]>
Cc: Paul Mackerras <[EMAIL PROTECTED]>
---
arch/powerpc/platforms/pseries/setup.c | 10 ++++++++--
1 files changed, 8 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/platforms/pseries/setup.c
b/arch/powerpc/platforms/pseries/setup.c
index ec34170..8270f04 100644
--- a/arch/powerpc/platforms/pseries/setup.c
+++ b/arch/powerpc/platforms/pseries/setup.c
@@ -504,8 +504,13 @@ static void pseries_dedicated_idle_sleep(void)
set_thread_flag(TIF_POLLING_NRFLAG);
while (get_tb() < start_snooze) {
- if (need_resched() || cpu_is_offline(cpu))
- goto out;
+ if (need_resched() || cpu_is_offline(cpu)) {
+ HMT_medium();
+ clear_thread_flag(TIF_POLLING_NRFLAG);
+ smp_mb();
+ local_irq_disable();
+ goto out2;
+ }
ppc64_runlatch_off();
HMT_low();
HMT_very_low();
@@ -523,6 +528,7 @@ static void pseries_dedicated_idle_sleep(void)
out:
HMT_medium();
+out2:
out_purr = mfspr(SPRN_PURR);
get_lppaca()->wait_state_cycles += out_purr - in_purr;
get_lppaca()->donate_dedicated_cpu = 0;
--
1.6.0.1.308.gede4c
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