Message-ID: <544E235C.5010908@gaast.net>
Date: Mon, 27 Oct 2014 10:50:04 +0000
From: Wilmer van der Gaast <wilmer@gaast.net>
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To: Yinghai Lu <yinghai@kernel.org>
CC: Bjorn Helgaas <bhelgaas@google.com>,
        "Rafael J. Wysocki" <rjw@rjwysocki.net>, Pavel Machek <pavel@ucw.cz>,
        Rafael Wysocki <rafael.j.wysocki@intel.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: Machine crashes right *after* ~successful resume
References: <543F049F.5090605@gaast.net> <CAE9FiQWDHq5esSt4UvE5AkHR-=XMvrzaNFwLg+0xKisTNOtcsQ@mail.gmail.com> <543F9182.9000004@gaast.net> <CAE9FiQVNZHTxpNCnn+YPtqjWrQjFmtTh06sbBawqFonMFwSZ-w@mail.gmail.com> <544033CF.3080104@gaast.net> <CAE9FiQW0x5uy_osjvVDOOMDaz2=2KL+TusQ8QqcHL5dWTPrK2w@mail.gmail.com> <5442FE58.5020700@gaast.net> <CAE9FiQWugqXZdZDhDyKofKRXH6EgVq6DJ0JphM6DZSdS5nMhbw@mail.gmail.com> <5446D2D8.2090203@gaast.net> <CAE9FiQWjvZapL0u5QSwD3gYTXisKrCgRcUYWAcy8onUYbkLHTg@mail.gmail.com> <20141022125354.GA3832@gaast.net> <CAE9FiQXF-6b4+y-BJmv7ekrCrXKYyhvZDBqVbLeXSPJa0_cToA@mail.gmail.com>
In-Reply-To: <CAE9FiQXF-6b4+y-BJmv7ekrCrXKYyhvZDBqVbLeXSPJa0_cToA@mail.gmail.com>
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Sender: linux-kernel-owner@vger.kernel.org

Hello Yinghai,

Thanks again for your time!

I've applied your two patches, and as a wild guess also added pci=dump 
to my kernel cmdline though I guess that just gave me a boot-time dump - 
which mostly didn't make it into my dmesg.

I accidentally booted with no_console_suspend on the first run, which 
still caused no output at all on the failed resume. I'm including the 
output of that anyway, but also I have a run with that flag removed, and 
annoyingly the crash appears to happen before the dump during the crash 
finishes - while dumping info for this device, it seems:

04:00.0 PCI bridge: Integrated Technology Express, Inc. Device 8892 (rev 
10) (prog-if 01 [Subtractive decode])

(More info in my lspci.txt)

Wondering what device that is exactly, I stumbled upon 
http://sourceforge.net/p/linux1394/mailman/message/29755048/ where 
someone describes it as a "cheap and crappy PCI bridge". More and more I 
wonder if I should just buy a new motherboard - sadly this one wasn't 
even that cheap. :-( Though I don't know if the output stopping while 
dumping output for this device means that it is the culprit, is printk() 
to the serial console in any way blocking/buffered?

Anyway, dumps are in:

http://gaast.net/~wilmer/.lkml/bad3.17-pcidumps-no_console_suspend.txt
http://gaast.net/~wilmer/.lkml/bad3.17-pcidumps.txt


Cheers,

Wilmer van der Gaast.

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