Subject: Re: [PATCH, RFC] panic-note: Annotation from user space for panics
From: Artem Bityutskiy <dedekind1@gmail.com>
Reply-To: dedekind1@gmail.com
To: Simon Kagstrom <simon.kagstrom@netinsight.net>
Cc: David VomLehn <dvomlehn@cisco.com>,
       Marco Stornelli <marco.stornelli@gmail.com>,
       linux-embedded@vger.kernel.org, akpm@linux-foundation.org,
       dwmw2@infradead.org, linux-kernel@vger.kernel.org, mpm@selenic.com,
       paul.gortmaker@windriver.com,
       "Shargorodsky Atal (EXT-Teleca/Helsinki)" 
	<ext-atal.shargorodsky@nokia.com>
In-Reply-To: <20091113125946.5353164c@marrow.netinsight.se>
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	 <4AFC4D31.2000101@gmail.com>
	 <20091112215649.GA28349@dvomlehn-lnx2.corp.sa.net>
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	 <1258112748.21596.1227.camel@localhost>
	 <20091113125946.5353164c@marrow.netinsight.se>
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Date: Fri, 13 Nov 2009 16:16:53 +0200
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On Fri, 2009-11-13 at 12:59 +0100, Simon Kagstrom wrote:
> (Also fix David Woodhouses address and add Atal)
> 
> On Fri, 13 Nov 2009 13:45:48 +0200
> Artem Bityutskiy <dedekind1@gmail.com> wrote:
> 
> > So we really need to print some user-space supplied information during
> > the panic, and then we store it on flash with mtdoops, and the later,
> > when the device has network access we send whole bunch of oopses via the
> > network.
> 
> Yes, I see that your case would have to be handled differently. A
> complication (which I believe was discussed before) is that kmsg_dump()
> is done before the panic notifiers are called.
> 
> The reason I put it there is to have it before crash_kexec(), so I
> guess we'll have to take up the discussion on what to do with it. For
> me it now seems like it would be OK to move kmsg_dump() down below the
> panic notifiers.
> 
> If you have a kdump kernel to load, then you will most likely not need
> the kmsg dumped data anyway.

Yeah, I think this is a separate issue which can be fixed separately.

-- 
Best Regards,
Artem Bityutskiy (Артём Битюцкий)

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