linux-kernel - Re: [PATCH v5] ramoops: use pstore interface

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Date:	Sat, 21 Jan 2012 09:33:24 +0100
From:	Marco Stornelli <marco.stornelli@...il.com>
To:	Seiji Aguchi <seiji.aguchi@....com>
CC:	Kees Cook <keescook@...omium.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Tony Luck <tony.luck@...el.com>, Arnd Bergmann <arnd@...db.de>,
	Greg Kroah-Hartman <greg@...ah.com>,
	Randy Dunlap <rdunlap@...otime.net>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v5] ramoops: use pstore interface

Il 19/01/2012 00:20, Seiji Aguchi ha scritto:
>>> Are there any specific usecases you need to unload ramoops?
>>
>> For me, it would be useful during development. Beyond that, not that I can see.
>
> Thank you for your quick relay. I understood this is useful for you.
>
> But, as Tony said, I think this is a low priority because
> there is a side effect for end users.
> If they unload ramoops by mistake, messages will be lost.
>
> In my opinion, we have to consider whether each feature
> is truly needed for end users (not for developers).
>
> Seiji
>
>

First of all ramoops was born mainly for debug purpose and to help the 
maintainability of a product. I used it in systems where the uptime (so 
no reboot) was important. So it can be very useful for me load the 
module, gather logs and unload it for example. A kernel panic is not 
recoverable so the reboot is needed but it's not always true for a 
kernel oops.

Marco
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