tmakin/ack-tegra
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

sched/core: WARN() when migrating to an offline CPU

Browse Source 
Migrating tasks to offline CPUs is a pretty big fail, warn about it.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20170907150614.094206976@infradead.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Peter Zijlstra
2017-09-07 17:03:52 +02:00
committed by Ingo Molnar
parent edd8e41d2e
commit 4ff9083b8a
1 changed files with 4 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
kernel/sched/core.c
+4
View File
@@ -1173,6 +1173,10 @@ void set_task_cpu(struct task_struct *p, unsigned int new_cpu)
WARN_ON_ONCE(debug_locks && !(lockdep_is_held(&p->pi_lock) || WARN_ON_ONCE(debug_locks && !(lockdep_is_held(&p->pi_lock) ||
lockdep_is_held(&task_rq(p)->lock))); lockdep_is_held(&task_rq(p)->lock)));
#endif #endif
/*
* Clearly, migrating tasks to offline CPUs is a fairly daft thing.
*/
WARN_ON_ONCE(!cpu_online(new_cpu));
#endif #endif
trace_sched_migrate_task(p, new_cpu); trace_sched_migrate_task(p, new_cpu);