From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:57618) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XS1eX-0001QZ-PM for qemu-devel@nongnu.org; Thu, 11 Sep 2014 06:31:09 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1XS1eL-0004u7-4b for qemu-devel@nongnu.org; Thu, 11 Sep 2014 06:31:01 -0400 Received: from mail-pa0-f42.google.com ([209.85.220.42]:50507) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XS1eK-0004tp-Vm for qemu-devel@nongnu.org; Thu, 11 Sep 2014 06:30:49 -0400 Received: by mail-pa0-f42.google.com with SMTP id lj1so8420874pab.15 for ; Thu, 11 Sep 2014 03:30:48 -0700 (PDT) Message-ID: <541179CF.3080501@ozlabs.ru> Date: Thu, 11 Sep 2014 20:30:39 +1000 From: Alexey Kardashevskiy MIME-Version: 1.0 References: <1410419467-9932-1-git-send-email-aik@ozlabs.ru> <1410420145.6138.7.camel@nilsson.home.kraxel.org> <54115AB9.8080700@ozlabs.ru> <1410430546.6138.9.camel@nilsson.home.kraxel.org> In-Reply-To: <1410430546.6138.9.camel@nilsson.home.kraxel.org> Content-Type: text/plain; charset=koi8-r Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH] ohci: Stop OHCI bus when PCI bus master is disabled List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Gerd Hoffmann Cc: qemu-ppc@nongnu.org, qemu-devel@nongnu.org, Alexander Graf On 09/11/2014 08:15 PM, Gerd Hoffmann wrote: > Hi, > >> To be precise, it is kdump. > > Ok, kdump is a different story, radically turn off all DMA is reasonable > in that case, normal driver shutdown might be unreliable after panic and > it also changes system state too much for a useful dump. > > ohci (and probably others too, but without spamming the log) throwing > dma errors then is normal fallout though. kdump kernel should be able > to bring the device back online after such an error, with your patch > applied you can't test that with qemu any more ... > >>> Independant of that we can move the ohci error logging to tracepoints, >>> so ohci emulation is silent by default. >> >> That is the other way to go, yes. > > Lets do it this way please. Yep, no problem, I'll make a small patch. Another question - I noticed that XHCI migration is broken in quite recent upstream QEMU, smells like memory corruption. Is it just me or just PPC or is it known issue? -- Alexey