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Date: Wed, 23 Jan 2013 19:10:29 +0100
From: Andrew Lunn <andrew@lunn.ch>
Subject: Re: [PATCH v2] mm: dmapool: use provided gfp flags for all
 dma_alloc_coherent() calls
Message-ID: <20130123181029.GE20719@lunn.ch>
References: <20121119144826.f59667b2.akpm@linux-foundation.org>
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To: Soeren Moch <smoch@web.de>
Cc: Andrew Lunn <andrew@lunn.ch>, Arnd Bergmann <arnd@arndb.de>, Jason Cooper <jason@lakedaemon.net>, Greg KH <gregkh@linuxfoundation.org>, Thomas Petazzoni <thomas.petazzoni@free-electrons.com>, KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>, linux-kernel@vger.kernel.org, Michal Hocko <mhocko@suse.cz>, linux-mm@kvack.org, Kyungmin Park <kyungmin.park@samsung.com>, Mel Gorman <mgorman@suse.de>, Andrew Morton <akpm@linux-foundation.org>, Marek Szyprowski <m.szyprowski@samsung.com>, linaro-mm-sig@lists.linaro.org, linux-arm-kernel@lists.infradead.org, Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>

> >>
> >
> >Now (in the last hour) stable, occasionally lower numbers:
> >3396 3396 3396 3396 3396 3396 3396 3396 3396 3396 3396 3396 3396 3396
> >3396 3396 3396 3396 3396 3396 3396 3396 3396 3396 3396 3396 3396 3396
> >3396 3396 3396 3396 3396 3396 3396 3396 3396 3396 3396 3396 3396 3396
> >3396 3396 3396 3396 3396 3396 3396 3396 3396 3365 3396 3394 3396 3396
> >3396 3396 3373 3396 3396 3396 3396 3396 3396 3396 3396 3396 3396 3396
> >3396 3353 3396 3396 3396 3396 3396 3396 3396 3396 3396 3396 3396 3396
> >3394 3396 3396 3396 3396 3396 3396 3396
> >
> >Before the last pool exhaustion going down:
> >3395 3395 3389 3379 3379 3374 3367 3360 3352 3343 3343 3343 3342 3336
> >3332 3324 3318 3314 3310 3307 3305 3299 3290 3283 3279 3272 3266 3265
> >3247 3247 3247 3242 3236 3236
> >
> Here I stopped vdr (and so closed all dvb_demux devices), the number
> was remaining the same 3236, even after restart of vdr (and restart
> of streaming).

So it does suggest a leak. Probably somewhere on an error path,
e.g. its lost video sync.

     Andrew

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