Commit 119fe5e0 authored by Mike Galbraith's avatar Mike Galbraith Committed by Ingo Molnar

sched: fix SMP migration latencies

fix SMP migration latencies: the vruntimes of different CPUs are
at incompatible offsets so they have to be fixed up when migrating
a task across CPUs.
Signed-off-by: default avatarMike Galbraith <efault@gmx.de>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
Signed-off-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
Reviewed-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent 02e0431a
...@@ -992,6 +992,9 @@ void set_task_cpu(struct task_struct *p, unsigned int new_cpu) ...@@ -992,6 +992,9 @@ void set_task_cpu(struct task_struct *p, unsigned int new_cpu)
if (p->se.block_start) if (p->se.block_start)
p->se.block_start -= clock_offset; p->se.block_start -= clock_offset;
#endif #endif
if (likely(new_rq->cfs.min_vruntime))
p->se.vruntime -= old_rq->cfs.min_vruntime -
new_rq->cfs.min_vruntime;
__set_task_cpu(p, new_cpu); __set_task_cpu(p, new_cpu);
} }
......
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