Author: jhb
Date: Fri Jul 29 20:19:14 2016
New Revision: 303503
URL: https://svnweb.freebsd.org/changeset/base/303503
Log:
Don't treat NOCPU as a valid CPU to CPU_ISSET.
If a thread is created bound to a cpuset it might already be bound before
it's very first timeslice, and td_lastcpu will be NOCPU in that case.
MFC after: 1 week
Modified:
head/sys/kern/sched_4bsd.c
Modified: head/sys/kern/sched_4bsd.c
==============================================================================
--- head/sys/kern/sched_4bsd.c Fri Jul 29 19:36:10 2016 (r303502)
+++ head/sys/kern/sched_4bsd.c Fri Jul 29 20:19:14 2016 (r303503)
@@ -1241,7 +1241,7 @@ sched_pickcpu(struct thread *td)
mtx_assert(&sched_lock, MA_OWNED);
- if (THREAD_CAN_SCHED(td, td->td_lastcpu))
+ if (td->td_lastcpu != NOCPU && THREAD_CAN_SCHED(td, td->td_lastcpu))
best = td->td_lastcpu;
else
best = NOCPU;
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