linux-kernel - RE: [PATCH -v10 0/4] Lock-less list

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Message-ID: <987664A83D2D224EAE907B061CE93D530194258DAE@orsmsx505.amr.corp.intel.com>
Date:	Thu, 20 Jan 2011 09:59:21 -0800
From:	"Luck, Tony" <tony.luck@...el.com>
To:	Ingo Molnar <mingo@...e.hu>, Borislav Petkov <bp@...en8.de>,
	huang ying <huang.ying.caritas@...il.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Huang, Ying" <ying.huang@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Andi Kleen <andi@...stfloor.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Chris Mason <chris.mason@...cle.com>,
	Mike Waychison <mikew@...gle.com>
Subject: RE: [PATCH -v10 0/4] Lock-less list

> > True story. And yet google folk still do that, unfortunately:
> > https://lkml.org/lkml/2011/1/10/419
>
> I wouldn't worry about that too much - such uses are extremely isolated.

Google is just one user - but they have (so I hear) a large number
of machines.

I would hazard a guess that there are other users that feel the
same way - i.e. users with a large number of machines that move
onto new kernel versions from time to time.

These users want a stable kernel->user ABI - and Google has stated
quite clearly that "printk" doesn't meet their need.  I think that
they would be happy with some other stable solution than mcelog,
but we might as well ask for their input before imposing something
on them.

Mike: would you like to join the conversation on how to report
errors - or nominate someone else to represent the Google point
of view?

-Tony

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