linux-kernel - Re: [PATCH -next v5] mm/hotplug: silence a lockdep splat with printk()

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Date:   Fri, 17 Jan 2020 11:35:08 -0500
From:   Qian Cai <cai@....pw>
To:     David Hildenbrand <david@...hat.com>
Cc:     akpm@...ux-foundation.org, mhocko@...nel.org,
        sergey.senozhatsky.work@...il.com, pmladek@...e.com,
        rostedt@...dmis.org, peterz@...radead.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH -next v5] mm/hotplug: silence a lockdep splat with printk()



> On Jan 17, 2020, at 11:27 AM, David Hildenbrand <david@...hat.com> wrote:
> 
> the "int" should go onto the next line as well
> [...]

Yes.

> apart from that looks good to me. I hope we won't have a whac-a-mole
> with printk() (including WARN_ON() etc?) under the zone lock. This all
> screams for a better fix.

WARN_ON() is normally not a concern. Once it happens here, we will figure out the reason why it happens in the first place and shut it off there instead.