From mboxrd@z Thu Jan 1 00:00:00 1970 From: Heiko =?iso-8859-1?q?St=FCbner?= Subject: Re: irq flood with mmc boot partitions on s3c2416 with 3.0rc1 Date: Thu, 16 Jun 2011 22:14:10 +0200 Message-ID: <201106162214.11084.heiko@sntech.de> References: <201106022149.47936.heiko@sntech.de> <201106141610.42700.heiko@sntech.de> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-arm-kernel-bounces@lists.infradead.org Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: Andrei Warkentin Cc: linux-mmc@vger.kernel.org, Kyungmin Park , linux-arm-kernel@lists.infradead.org List-Id: linux-mmc@vger.kernel.org Am Dienstag 14 Juni 2011, 22:32:41 schrieb Andrei Warkentin: > Hi Heiko, > = > On Tue, Jun 14, 2011 at 9:10 AM, Heiko St=FCbner wrote: > > nope, no updates yet. The flood also only starts when udev wants to > > create its device nodes, meaning the initial detection seems not to > > produce this problem > > = > > But when I disable the whole boot partition stuff, it works as before > > without irq storms. > > = > > As there don't seem to exist reports from other emmc users about this > > I guess the problem lays somewhere between the boot-partitions-patch > > and the sdhci-s3c driver (for s3c2416 at least). > = > Alright. Curious. Can you let me know what eMMC device you are > connecting to the controller? What is the eMMC revision? hmm ... how do I find these? The real device providing the storage is a 2GB NAND Flash from Hynix. And sadly both of your patches didn't change anything. I made two interessting observations: during boot the initial detection works ok - I can even mount the normal = partitions without hickup when I stop it before the udev stage. The irq storm seems to be caused by something udev does during its populati= on = of the /dev filesystem. And second the mentioned irq storm never stops during the runtime of the = device. When I let it boot through it spews what must be millions of the ir= q = messages and does so until I shut it down. Heiko