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Re: [android-kernel] Re: Apanic to EMMC? Jason Shim Tue Feb 14 10:01:35 2012

Hi,

In order to save apanic data into emmc, you need a emmc driver(should be
polling mode because it's in atomic context at this time) as by default
it's MTD.
There should be open source emmc polling mode driver available.

Thanks,


On Tue, Feb 14, 2012 at 8:14 AM, Rudolf Tammekivi <[EMAIL PROTECTED]>wrote:

> The reason I think the RAM is cleared that ram_console reports
> sig=0xffffffff after I restart it. Or is it supposed to be like this?
> I'm a bit dumb at that part...
>
> About mini kernel - it's the kdump kernel one, which should boot after
> crash? Currently, I am trying to boot a custom kernel on the
> "recovery" mode, and when it crashes, it reboots in "normal" mode.
>
> A offtopic question - all those parameters after MACHINE_START
> (.reserve, .init_early), in which order are those started?
>
> On Feb 11, 9:22 am, Jagadish K <[EMAIL PROTECTED]> wrote:
> > Hi,
> > During kernel panic, as the name suggests kernel is going to die. So its
> > not a good idea to save logs at that time.
> > However, you can Register your function in panic_notifier_list. Your
> > function will be called during panic. In that function, you can modify
> how
> > the device should reboot or any other suitable action.
> > After arch_reset, ram dumps can be saved to mmc card either through
> > bootloader or by using mini kernel concept (allow a separate kernel to
> boot
> > which will save ram dumps into mmc).
> > Old Ram data exists till kernel boots again after reset. Not sure how in
> > your case ram content is cleared. Ram data is cleared only when battery
> is
> > removed.
> >
> > On Wed, Feb 8, 2012 at 9:04 PM, Rudolf Tammekivi <[EMAIL PROTECTED]
> >wrote:
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > > Hello,
> >
> > > I have a device that has MMC card inside, with the partition table. My
> > > question is, if "panic" happens, can I use apanic module to save the
> log to
> > > MMC not to the MTD partition? I did try ram_console, but the problem
> with
> > > that is, my device's RAM is cleared out after restart, so I can't get
> the
> > > logs.
> >
> > > The platform is MSM7X30.
> >
> > > Regards,
> > > Rudolf.
> >
> > > --
> > > unsubscribe: [EMAIL PROTECTED]
> > > website:http://groups.google.com/group/android-kernel
> >
> > --
> > Regards,
> > Jagadish K
>
> --
> unsubscribe: [EMAIL PROTECTED]
> website: http://groups.google.com/group/android-kernel
>



-- 
Jason Shim
Software Engineer, Motorola, Inc

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