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| author |   Frederic Weisbecker <frederic@kernel.org> | 2022-02-08 17:16:35 +0100 |
|---|---|---|
| committer | Frederic Weisbecker <frederic@kernel.org> | 2022-03-07 23:53:50 +0100 |
| commit | f96272a90d9eaea9933aaab704ddbd258feb3841 (patch) | |
| tree | 95dcece73d404446f2a064227b55e07de0a8501d /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | tick/rcu: Stop allowing RCU_SOFTIRQ in idle (diff) | |
| download | wireguard-linux-f96272a90d9eaea9933aaab704ddbd258feb3841.tar.xz wireguard-linux-f96272a90d9eaea9933aaab704ddbd258feb3841.zip | |
lib/irq_poll: Declare IRQ_POLL softirq vector as ksoftirqd-parking safe
The following warning may appear while setting a CPU down:
NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #20!!!
The IRQ_POLL_SOFTIRQ vector can be raised during the hotplug cpu_down()
path after ksoftirqd is parked and before the CPU actually dies. However
this is handled afterward at the CPUHP_IRQ_POLL_DEAD stage where the
queue gets migrated.
Hence this warning can be considered spurious and the vector can join
the "hotplug-safe" list.
Reported-and-tested-by: Paul Menzel <pmenzel@molgen.mpg.de>
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Paul E. McKenney <paulmck@kernel.org>
Cc: Paul Menzel <pmenzel@molgen.mpg.de>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions