On 2021-09-30 12:37:54 [+0200], To linux-kernel@xxxxxxxxxxxxxxx wrote: > __raise_softirq_irqoff() adds a bit to the pending sofirq mask and this > is it. The softirq won't be handled in a deterministic way but randomly > when an interrupt fires and handles softirq in its irq_exit() routine or > if something randomly checks and handles pending softirqs in the call > chain before the CPU goes idle. > > Add a local_bh_disable/enable() around the IRQ-off section which will > handle pending softirqs. ping > Signed-off-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx> > --- > lib/irq_poll.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/lib/irq_poll.c b/lib/irq_poll.c > index 2f17b488d58e1..2b9f797642f60 100644 > --- a/lib/irq_poll.c > +++ b/lib/irq_poll.c > @@ -191,11 +191,13 @@ static int irq_poll_cpu_dead(unsigned int cpu) > * If a CPU goes away, splice its entries to the current CPU > * and trigger a run of the softirq > */ > + local_bh_disable(); > local_irq_disable(); > list_splice_init(&per_cpu(blk_cpu_iopoll, cpu), > this_cpu_ptr(&blk_cpu_iopoll)); > __raise_softirq_irqoff(IRQ_POLL_SOFTIRQ); > local_irq_enable(); > + local_bh_enable(); > > return 0; > } > -- > 2.33.0 > Sebastian
