linux-kernel - RE: [RFC] pstore: Don't use persistent store for normal shutdown

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Message-ID: <5C4C569E8A4B9B42A84A977CF070A35B2C14F5A4A0@USINDEVS01.corp.hds.com>
Date:	Mon, 21 Mar 2011 17:47:49 -0400
From:	Seiji Aguchi <seiji.aguchi@....com>
To:	Tony Luck <tony.luck@...el.com>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	David Woodhouse <dwmw2@...radead.org>,
	Marco Stornelli <marco.stornelli@...il.com>,
	Artem Bityutskiy <Artem.Bityutskiy@...ia.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: RE: [RFC] pstore: Don't use persistent store for normal shutdown

Hi,

>Should I still try to save as much data in these cases? Saving 1 Kbyte would be
>enough to have the last dozen+ lines, including the critical
>    <0>[  536.970556] Restarting system.
>that you'd like to see.

On my assumption, critical information is the last dozen lines.
However, it depends on the situations how much data is needed or what kind of data is useful.

I think we should introduce a tunable parameter specifying how much data stores into persistent
ram when normal shutdown happens.

Seiji
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