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Date:   Fri, 15 Mar 2019 10:20:20 +0100
From:   Christoph Hellwig <>
To:     Jianchao Wang <>
Subject: Re: [PATCH 0/8]: blk-mq: use static_rqs to iterate busy tags

On Fri, Mar 15, 2019 at 04:57:36PM +0800, Jianchao Wang wrote:
> Hi Jens
> As we know, there is a risk of accesing stale requests when iterate
> in-flight requests with tags->rqs[] and this has been talked in following
> thread,
> [1]
> [2]

I'd rather take one step back and figure out why we are iterating
the busy requests.  There really shouldn't be any reason why a driver
is even doings that (vs some error handling helpers in the core
block code that can properly synchronize).

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