From: Soeren Moch <smoch@web.de>
To: Andrew Lunn <andrew@lunn.ch>
Cc: 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>
Subject: Re: [PATCH v2] mm: dmapool: use provided gfp flags for all dma_alloc_coherent() calls
Date: Wed, 23 Jan 2013 16:30:53 +0100 [thread overview]
Message-ID: <5100022D.9050106@web.de> (raw)
In-Reply-To: <20130119185907.GA20719@lunn.ch>
On 19.01.2013 19:59, Andrew Lunn wrote:
>> Please find attached a debug log generated with your patch.
>>
>> I used the sata disk and two em28xx dvb sticks, no other usb devices,
>> no ethernet cable connected, tuners on saa716x-based card not used.
>>
>> What I can see in the log: a lot of coherent mappings from sata_mv
>> and orion_ehci, a few from mv643xx_eth, no other coherent mappings.
>> All coherent mappings are page aligned, some of them (from orion_ehci)
>> are not really small (as claimed in __alloc_from_pool).
>>
>> I don't believe in a memory leak. When I restart vdr (the application
>> utilizing the dvb sticks) then there is enough dma memory available
>> again.
>
> Hi Soeren
>
> We should be able to rule out a leak. Mount debugfg and then:
>
> while [ /bin/true ] ; do cat /debug/dma-api/num_free_entries ; sleep 60 ; done
>
> while you are capturing. See if the number goes down.
>
> Andrew
Now I built a kernel with debugfs enabled.
It is not clear to me what I can see from the dma-api/num_free_entries
output. After reboot (vdr running) I see decreasing numbers (3453 3452
3445 3430...), min_free_entries is lower (3390). Sometimes the output is
constant for several minutes ( 3396 3396 3396 3396 3396,...)
Soeren
next prev parent reply other threads:[~2013-01-23 15:32 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-08 6:38 [PATCH] mm: dmapool: use provided gfp flags for all dma_alloc_coherent() calls Marek Szyprowski
2012-11-11 17:22 ` Andrew Lunn
2012-11-12 9:48 ` Soeren Moch
2012-11-12 10:38 ` Andrew Lunn
2012-11-12 11:03 ` Soeren Moch
2012-11-19 0:18 ` Jason Cooper
2012-11-19 22:48 ` Andrew Morton
2012-11-20 10:48 ` Marek Szyprowski
2012-11-20 19:52 ` Andrew Morton
2012-11-20 14:31 ` [PATCH v2] " Marek Szyprowski
2012-11-20 19:33 ` Andrew Morton
2012-11-20 20:27 ` Jason Cooper
2012-11-21 8:08 ` Marek Szyprowski
2012-11-21 8:36 ` Andrew Morton
2012-11-21 9:20 ` Marek Szyprowski
2012-11-21 19:17 ` Andrew Morton
2012-11-22 12:55 ` Marek Szyprowski
2013-01-14 11:56 ` Soeren Moch
2013-01-15 16:56 ` Jason Cooper
2013-01-15 17:50 ` Greg KH
2013-01-15 20:16 ` Jason Cooper
2013-01-15 21:56 ` Jason Cooper
2013-01-16 0:17 ` Soeren Moch
2013-01-16 2:40 ` Jason Cooper
2013-01-16 3:24 ` Soeren Moch
2013-01-16 8:55 ` Soeren Moch
2013-01-16 15:50 ` [PATCH] ata: sata_mv: fix sg_tbl_pool alignment Jason Cooper
2013-01-16 17:05 ` Soeren Moch
2013-01-16 17:52 ` Jason Cooper
2013-01-16 18:35 ` Jason Cooper
2013-01-16 22:26 ` Soeren Moch
2013-01-16 23:10 ` Soeren Moch
2013-01-17 9:11 ` Soeren Moch
2013-01-16 17:32 ` [PATCH v2] mm: dmapool: use provided gfp flags for all dma_alloc_coherent() calls Soeren Moch
2013-01-16 17:47 ` Jason Cooper
2013-01-16 22:36 ` Soeren Moch
2013-01-17 10:49 ` Arnd Bergmann
2013-01-17 13:47 ` Soeren Moch
2013-01-17 20:26 ` Arnd Bergmann
2013-01-19 15:29 ` Soeren Moch
2013-01-19 18:59 ` Andrew Lunn
2013-01-23 15:30 ` Soeren Moch [this message]
2013-01-23 16:25 ` Andrew Lunn
2013-01-23 17:07 ` Soeren Moch
2013-01-23 17:20 ` Soeren Moch
2013-01-23 18:10 ` Andrew Lunn
2013-01-28 20:59 ` Soeren Moch
2013-01-29 0:13 ` Jason Cooper
2013-01-29 11:02 ` Andrew Lunn
2013-01-29 11:50 ` Soeren Moch
2013-01-19 20:05 ` Arnd Bergmann
2013-01-21 15:01 ` Soeren Moch
2013-01-21 18:55 ` Arnd Bergmann
2013-01-21 21:01 ` Greg KH
2013-01-22 18:13 ` Arnd Bergmann
2013-01-23 14:37 ` Soeren Moch
2013-01-19 16:24 ` Andrew Lunn
2013-01-15 20:05 ` Sebastian Hesselbarth
2013-01-15 20:19 ` Jason Cooper
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