linux-kernel - BUG: Bad rss-counter state

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Message-ID: <20120408113925.GA292@x4>
Date:	Sun, 8 Apr 2012 13:39:25 +0200
From:	Markus Trippelsdorf <markus@...ppelsdorf.de>
To:	linux-mm@...ck.org
Cc:	linux-kernel@...r.kernel.org,
	Konstantin Khlebnikov <khlebnikov@...nvz.org>,
	Hugh Dickins <hughd@...gle.com>
Subject: BUG: Bad rss-counter state

I've hit the following warning after I've tried to link Firofox's libxul
with "-flto -lto-partition=none" on my machine with 8GB memory. I've
killed the process after it used all the memory and 90% of my swap
space. Before the machine was rebooted I saw these messages:

Apr  8 13:11:08 x4 kernel: BUG: Bad rss-counter state mm:ffff88020813c380 idx:1 val:-1
Apr  8 13:11:08 x4 kernel: BUG: Bad rss-counter state mm:ffff88020813c380 idx:2 val:1
Apr  8 13:11:08 x4 kernel: BUG: Bad rss-counter state mm:ffff88021503bb80 idx:1 val:-1
Apr  8 13:11:08 x4 kernel: BUG: Bad rss-counter state mm:ffff8801fb643b80 idx:1 val:-1
Apr  8 13:11:08 x4 kernel: BUG: Bad rss-counter state mm:ffff8801fb643b80 idx:2 val:1
Apr  8 13:11:08 x4 kernel: BUG: Bad rss-counter state mm:ffff88021503bb80 idx:2 val:1
Apr  8 13:11:08 x4 kernel: BUG: Bad rss-counter state mm:ffff88020a4ff800 idx:1 val:-1
Apr  8 13:11:08 x4 kernel: BUG: Bad rss-counter state mm:ffff88020a4ff800 idx:2 val:1
Apr  8 13:11:08 x4 kernel: BUG: Bad rss-counter state mm:ffff88020813ce00 idx:1 val:-1
Apr  8 13:11:08 x4 kernel: BUG: Bad rss-counter state mm:ffff88020813ce00 idx:2 val:1
Apr  8 13:11:08 x4 kernel: BUG: Bad rss-counter state mm:ffff8801fadda680 idx:1 val:-1
Apr  8 13:11:08 x4 kernel: BUG: Bad rss-counter state mm:ffff8801fadda680 idx:2 val:1

These warnings were introduced by c3f0327f8e9d7. Wouldn't it make sense to hide
them under some debugging option? AFAICS they contain no information that could
be of any use to a casual user.

-- 
Markus
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