linux-kernel - Re: [mm -next] mapping->tree_lock inconsistent lock state

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Message-ID: <20160203184509.GB4007@cmpxchg.org>
Date:	Wed, 3 Feb 2016 13:45:09 -0500
From:	Johannes Weiner <hannes@...xchg.org>
To:	Sergey Senozhatsky <sergey.senozhatsky@...il.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Michal Hocko <mhocko@...nel.org>,
	Vladimir Davydov <vdavydov@...tuozzo.com>,
	Vlastimil Babka <vbabka@...e.cz>, cgroups@...r.kernel.org,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
	Benjamin LaHaise <bcrl@...ck.org>
Subject: Re: [mm -next] mapping->tree_lock inconsistent lock state

On Thu, Feb 04, 2016 at 12:36:33AM +0900, Sergey Senozhatsky wrote:
> Hello,
> 
> next-20160203
> 
> [ 3587.997451] =================================
> [ 3587.997453] [ INFO: inconsistent lock state ]
> [ 3587.997456] 4.5.0-rc2-next-20160203-dbg-00007-g37a0a9d-dirty #377 Not tainted
> [ 3587.997457] ---------------------------------
> [ 3587.997459] inconsistent {IN-SOFTIRQ-W} -> {SOFTIRQ-ON-W} usage.

Thanks Sergey. Vladimir sent a patch to move mem_cgroup_migrate() out
of the IRQ-disabled section:

http://marc.info/?l=linux-mm&m=145452460721208&w=2

It looks like Vladimir's original message didn't make it to linux-mm,
only my reply to it; CC Ben LaHaise.