On 2022-02-15 17:23:45 [+0800], Ming Lei wrote:
> > diff --git a/block/blk-mq.c b/block/blk-mq.c
> > index 1adfe4824ef5e..90217f1b09add 100644
> > --- a/block/blk-mq.c
> > +++ b/block/blk-mq.c
> > @@ -2040,14 +2040,10 @@ static void __blk_mq_delay_run_hw_queue(struct blk_mq_hw_ctx *hctx, bool async,
> > return;
> >
> > if (!async && !(hctx->flags & BLK_MQ_F_BLOCKING)) {
> > - int cpu = get_cpu();
>
> Did you observe the warning triggered? might_sleep_if(true) in
> __blk_mq_run_dispatch_ops() is only supposed to be run in case of
> (hctx->flags & BLK_MQ_F_BLOCKING).
I haven't seen it triggering but if that call chain is possible then it
will triggert due to get_cpu().
> Thanks,
> Ming
Sebastian
