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futex_wait_queue_me: Spin-sleep when timeout and idle_halt is specified

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schedule_timeout() with idle_halt should use spin sleep because sleep
with timeout is not implemented.

Change-Id: Ia0bebcc10ddfb872bffeece7f13fb35a4791db18
This commit is contained in:
Masamichi Takagi
2018-08-16 16:28:12 +09:00
committed by Dominique Martinet
parent f18d1f5383
commit 0b2169964a
1 changed files with 5 additions and 2 deletions
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7
kernel/futex.c
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@ -672,8 +672,11 @@ static uint64_t futex_wait_queue_me(struct futex_hash_bucket *hb, struct futex_q
*/
xchg4(&(cpu_local_var(current)->status), PS_INTERRUPTIBLE);
/* Indicate spin sleep */
if (!idle_halt) {
/* Indicate spin sleep. Note that schedule_timeout() with
* idle_halt should use spin sleep because sleep with timeout
* is not implemented.
*/
if (!idle_halt || timeout) {
irqstate = ihk_mc_spinlock_lock(&thread->spin_sleep_lock);
thread->spin_sleep = 1;
ihk_mc_spinlock_unlock(&thread->spin_sleep_lock, irqstate);