linux-kernel - Re: X-freeze after clflush changes [Was: 2.6.23-rc6-mm1]

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Message-ID: <46F753F5.7060707@gmail.com>
Date:	Mon, 24 Sep 2007 08:06:45 +0200
From:	Jiri Slaby <jirislaby@...il.com>
To:	Valdis.Kletnieks@...edu
CC:	Matt Mackall <mpm@...enic.com>, Dave Airlie <airlied@...il.com>,
	Andi Kleen <andi@...stfloor.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: X-freeze after clflush changes [Was: 2.6.23-rc6-mm1]

On 09/24/2007 05:25 AM, Valdis.Kletnieks@...edu wrote:
> On Fri, 21 Sep 2007 21:43:20 +0200, Jiri Slaby said:
>> On 09/21/2007 09:38 PM, Jiri Slaby wrote:
>>> It is rather the other user who adds the page to some other list while bein
> g at
>>> deferred_pages list. Could you try my debug patch
>>> (http://lkml.org/lkml/2007/9/19/141)?
>> or the whitespace non-damaged version:
>> http://www.fi.muni.cz/~xslaby/sklad/pageattr_debug
> 
> Gaak. Is that thing *supposed* to spew zillions of lines of output?

Oh, probably yes.

> Some of the hits we get (I'm wondering if anything after the first makes
> any sense, or if we're just slowly watching the corruption spread - the
> thing ended up near 23K lines long before I gave up and hit the poweroff
> button because there was no end in sight):

Yes. it's not perfect, most of them are false positives (It's OK).

> (If there's something specific you want me to find in the output,
> like "the first time we see XYZ", yell...)

Heh :). The few last before the list corruption BUG (you have to have LIST_DEBUG
enabled) -- but it seems you never reached that phase?

regards,
-- 
Jiri Slaby (jirislaby@...il.com)
Faculty of Informatics, Masaryk University
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