Re: dm review needed, was: Re: [PATCH v3 2/3] blk-cgroup: store blkcg in bio instead of blkg

[Christoph Hellwig]

On Fri, Sep 18, 2026 at 05:19:53PM +0800, yu kuai wrote:
> So I think we don't need to restore the reference, BTW, there is another approach to
> avoid such problem in blk-throttle I don't take for now:
> 
> For bio entering blk-throttle, we can clear the new flag and blkg reference directly
> after the bio is throttled and before this bio is issuing to disk, because bio will
> not enter blk-throttle in the completion path. And since blk-throttle is the only rq_qos
> policy that can be enabled for bio-based disk, then dm_bio_record() will never see a
> bio with the new flag set.

That sounds much better, thanks!