Re: [PATCH v2] blk_iocost: remove some duplicate irq disable/enables

[Tejun Heo]

On Thu, Oct 03, 2024 at 11:22:09AM -1000, Tejun Heo wrote:
> Yeah, that should be spin_lock_irq() for consistency but at the same time it
> doesn't look like anything is actually grabbing that lock (or blkcg->lock
> nesting outside of it) from an IRQ context, so no actual deadlock scenario
> exists and lockdep doesn't trigger.

Oh, wait, it's not that. blkg_conf_prep() implies queue_lock, so the IRQ is
disabled around it and adding _irq will trigger lockdep.

Thanks.

-- 
tejun