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| author | Thomas Gleixner <[email protected]> | 2016-03-03 09:52:10 +0000 |
|---|---|---|
| committer | Thomas Gleixner <[email protected]> | 2016-03-03 09:52:10 +0000 |
| commit | 71f87b2fc64c2e9b6d53cb817f28711b959d3dfe (patch) | |
| tree | 1be0de7afced46cfca629dcbfc1807280c50bb13 /net/switchdev/switchdev.c | |
| parent | rcu: Make CPU_DYING_IDLE an explicit call (diff) | |
| download | kernel-71f87b2fc64c2e9b6d53cb817f28711b959d3dfe.tar.gz kernel-71f87b2fc64c2e9b6d53cb817f28711b959d3dfe.zip | |
cpu/hotplug: Plug death reporting race
Paul noticed that the conversion of the death reporting introduced a race
where the outgoing cpu might be delayed after waking the controll processor,
so it might not be able to call rcu_report_dead() before being physically
removed, leading to RCU stalls.
We cant call complete after rcu_report_dead(), so instead of going back to
busy polling, simply issue a function call to do the completion.
Fixes: 27d50c7eeb0f "rcu: Make CPU_DYING_IDLE an explicit call"
Reported-by: Paul E. McKenney <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Thomas Gleixner <[email protected]>
Acked-by: Peter Zijlstra <[email protected]>
Diffstat (limited to 'net/switchdev/switchdev.c')
0 files changed, 0 insertions, 0 deletions