sched/fair: Avoid pulling all tasks in idle balancing
In idle balancing where a CPU going idle pulls tasks from another CPU, a livelock may happen if the CPU pulls all tasks from another, makes it idle, and this iterates. So just avoid this. Reported-by:Rabin Vincent <rabin.vincent@axis.com> Signed-off-by:
Yuyang Du <yuyang.du@intel.com> Signed-off-by:
Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Ben Segall <bsegall@google.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Mike Galbraith <umgwanakikbuti@gmail.com> Cc: Morten Rasmussen <morten.rasmussen@arm.com> Cc: Paul Turner <pjt@google.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20150705221151.GF5197@intel.com Signed-off-by:
Ingo Molnar <mingo@kernel.org>
parent
63caae84
Please register or sign in to comment