linux-kernel - Re: [PATCH -next v4] mm/hotplug: silence a lockdep splat with printk()

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Message-Id: <6BED7E12-CC3B-4AED-ACC8-F3533D3F3C70@lca.pw>
Date:   Fri, 17 Jan 2020 07:40:15 -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, Michal Hocko <mhocko@...e.com>
Subject: Re: [PATCH -next v4] mm/hotplug: silence a lockdep splat with printk()



> On Jan 17, 2020, at 3:51 AM, David Hildenbrand <david@...hat.com> wrote:
> 
> -> you are accessing the pageblock without the zone lock. It could
> change to "isolate" again in the meantime if I am not wrong!

Since we are just dumping the state for debugging, it should be fine to accept a bit inaccuracy here due to racing. I could put a bit comments over there.