From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx180.postini.com [74.125.245.180]) by kanga.kvack.org (Postfix) with SMTP id CD4406B0006 for ; Sat, 19 Jan 2013 14:02:10 -0500 (EST) Date: Sat, 19 Jan 2013 19:59:07 +0100 From: Andrew Lunn Subject: Re: [PATCH v2] mm: dmapool: use provided gfp flags for all dma_alloc_coherent() calls Message-ID: <20130119185907.GA20719@lunn.ch> References: <20121119144826.f59667b2.akpm@linux-foundation.org> <201301171049.30415.arnd@arndb.de> <50F800EB.6040104@web.de> <201301172026.45514.arnd@arndb.de> <50FABBED.1020905@web.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <50FABBED.1020905@web.de> Sender: owner-linux-mm@kvack.org List-ID: To: Soeren Moch Cc: Arnd Bergmann , Jason Cooper , Greg KH , Thomas Petazzoni , Andrew Lunn , KAMEZAWA Hiroyuki , linux-kernel@vger.kernel.org, Michal Hocko , linux-mm@kvack.org, Kyungmin Park , Mel Gorman , Andrew Morton , Marek Szyprowski , linaro-mm-sig@lists.linaro.org, linux-arm-kernel@lists.infradead.org, Sebastian Hesselbarth > 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 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org