Date: Sat, 13 Nov 2010 14:11:36 -0800 From: Garrett Cooper <gcooper@FreeBSD.org> To: Robert Watson <rwatson@freebsd.org> Cc: Kostik Belousov <kostikbel@gmail.com>, Alexander Best <arundel@freebsd.org>, freebsd-current@freebsd.org Subject: Re: www/chromium crashing whole system Message-ID: <AANLkTim7ZGLFTj_3WZiC9hAsAaOVrz6yhKcMURV%2BsKvu@mail.gmail.com> In-Reply-To: <alpine.BSF.2.00.1011132206380.12353@fledge.watson.org> References: <20101112223715.GA1356@freebsd.org> <20101113112447.GF2392@deviant.kiev.zoral.com.ua> <20101113115900.GA14975@freebsd.org> <20101113122853.GG2392@deviant.kiev.zoral.com.ua> <20101113123846.GA21390@freebsd.org> <20101113124146.GH2392@deviant.kiev.zoral.com.ua> <20101113124758.GA23469@freebsd.org> <alpine.BSF.2.00.1011132206380.12353@fledge.watson.org>
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On Sat, Nov 13, 2010 at 2:08 PM, Robert Watson <rwatson@freebsd.org> wrote:
>
> On Sat, 13 Nov 2010, Alexander Best wrote:
>
>>>> i tried detaching and attaching my keyboard after chromium crashed my
>>>> system and the lights of the keyboard didn't even went on. so in fact
>>>> everything crashed and not just X.
>>>
>>> If I said it unclear, let me repeat, the usermode crash dump you got
>>> probably has nothing common with the kernel issue.
>>
>> oh sorry. indeed i misunderstood you there. well i guess this is the
>> problem most regular users have. we don't own any serial/firewire consoles.
>> all i can offer is to add kernel OPTIONS. however none of them seem to be
>> able to prevent the lock up and instead letting me enter the debugger or
>> trigger a kernel core dump.
>>
>> i even have watchdog running, but without any sucess. i guess all i can
>> hope for is that maybe at some point a kernel dump does make it to disk.
>
> Do you have a second box you can run X11 on, and SSH into the box that will
> run Chromium? If it is really Chromium triggering the crash, this might
> allow you to access the console when it crashes. However, if it's Chromium
> triggering an X11-related crash, it might well not. (Also, it might well
> not because of timing differences, but it is worth a try).
>
> Another thing to consider is starting Chromium when switched to a text
> virtual console from X11, which would leave you in text mode for DDB, or at
> least let you see something interesting on the console.
>
> If regular crashdumps appear unreliable, try setting up a textdump with an
> automatic reboot, that might provde more reliable (small chance, but it
> could).
Isn't there also DEADLKRES that might be helpful in this case (if
Alex is really dealing with a livelock in the kernel)...?
Thanks,
-Garrett
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