linux-kernel - RE: [PATCH 3/6] pstore: Add persistent function tracing

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Message-ID: <3908561D78D1C84285E8C5FCA982C28F1931FC30@ORSMSX104.amr.corp.intel.com>
Date:	Fri, 15 Jun 2012 21:40:37 +0000
From:	"Luck, Tony" <tony.luck@...el.com>
To:	Anton Vorontsov <anton.vorontsov@...aro.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Kees Cook <keescook@...omium.org>,
	Colin Cross <ccross@...roid.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...hat.com>
CC:	Arnd Bergmann <arnd@...db.de>,
	John Stultz <john.stultz@...aro.org>,
	Shuah Khan <shuahkhan@...il.com>,
	"arve@...roid.com" <arve@...roid.com>,
	Rebecca Schultz Zavin <rebecca@...roid.com>,
	Jesper Juhl <jj@...osbits.net>,
	Randy Dunlap <rdunlap@...otime.net>,
	Stephen Boyd <sboyd@...eaurora.org>,
	Thomas Meyer <thomas@...3r.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Marco Stornelli <marco.stornelli@...il.com>,
	WANG Cong <xiyou.wangcong@...il.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devel@...verdev.osuosl.org" <devel@...verdev.osuosl.org>,
	"linaro-kernel@...ts.linaro.org" <linaro-kernel@...ts.linaro.org>,
	"patches@...aro.org" <patches@...aro.org>,
	"kernel-team@...roid.com" <kernel-team@...roid.com>
Subject: RE: [PATCH 3/6] pstore: Add persistent function tracing

> We store the log in a binary format and then decode it at read time.

What are the advantages of this compared to creating the human
readable text and saving a blob of text?

What does this "binary format" look like?  Will it ever change?
Remember that we may reboot to a different kernel - so we have
to be really sure that the newer (or older) version can do the decode.

-Tony
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