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

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Message-ID: <5C4C569E8A4B9B42A84A977CF070A35B2C14F5A465@USINDEVS01.corp.hds.com>
Date:	Mon, 21 Mar 2011 15:49:14 -0400
From:	Seiji Aguchi <seiji.aguchi@....com>
To:	"Luck, Tony" <tony.luck@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:	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,

>Seiji Aguchi added kmsg_dump options for all the "normal" ways
>that a system can be shut down (KEXEC, RESTART, HALT and POWEROFF).
>It doesn't seem useful to save the kernel log to persistent store
>in these cases.

I think we should save the tail of kernel log into persistent store
for both every shutdown and kexec path because these data are useful
in enterprise area.

I already described the useful case in lkml (see below).

normal shutdown:
https://lkml.org/lkml/2010/11/17/249

kexec:
https://lkml.org/lkml/2011/2/23/325

Seiji
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