Initialize the idle thread's lock sooner so it's not evaluated on every fork
exit and we can rely on it elsewhere. Reviewed by: mav, kib, jhb, markj Differential Revision: https://reviews.freebsd.org/D22624
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Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=355312
@ -1463,7 +1463,7 @@ sched_setup(void *dummy)
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/* Add thread0's load since it's running. */
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TDQ_LOCK(tdq);
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thread0.td_lock = TDQ_LOCKPTR(TDQ_SELF());
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thread0.td_lock = TDQ_LOCKPTR(tdq);
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tdq_load_add(tdq, &thread0);
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tdq->tdq_lowpri = thread0.td_priority;
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TDQ_UNLOCK(tdq);
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@ -2913,6 +2913,7 @@ sched_throw(struct thread *td)
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spinlock_exit();
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PCPU_SET(switchtime, cpu_ticks());
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PCPU_SET(switchticks, ticks);
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PCPU_GET(idlethread)->td_lock = TDQ_LOCKPTR(tdq);
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} else {
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tdq = TDQ_SELF();
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MPASS(td->td_lock == TDQ_LOCKPTR(tdq));
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@ -2943,8 +2944,6 @@ sched_fork_exit(struct thread *td)
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*/
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cpuid = PCPU_GET(cpuid);
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tdq = TDQ_SELF();
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if (TD_IS_IDLETHREAD(td))
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td->td_lock = TDQ_LOCKPTR(tdq);
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MPASS(td->td_lock == TDQ_LOCKPTR(tdq));
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td->td_oncpu = cpuid;
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TDQ_LOCK_ASSERT(tdq, MA_OWNED | MA_NOTRECURSED);
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