[PATCH] Fix DEBUG_PAGEALLOC on 603/e300

[Maindoor]

Any updates on this ? I need something similar.

Thanks,
Maindoor.

--- On Thu, 4/29/10, Benjamin Herrenschmidt <benh at kernel.crashing.org> wrote:

From: Benjamin Herrenschmidt <benh at kernel.crashing.org>
Subject: Re: [PATCH] Fix DEBUG_PAGEALLOC on 603/e300
To: "Xianghua Xiao" <xiaoxianghua at gmail.com>
Cc: "linuxppc-dev" <linuxppc-dev at lists.ozlabs.org>
Date: Thursday, April 29, 2010, 3:59 AM

On Wed, 2010-04-28 at 14:15 -0500, Xianghua Xiao wrote:
> This change works me on a 834x(e300) platform, tested with lmbench and
> a production-ready application with 2.6.33.3.

But have you tested that DEBUG_PAGEALLOC actually works ? :-)

A way to do that is to

    - get_free_pages a page
    - read from it
    - free it
    - write to it

It should oops on the write, and I suspect that without my patch it
doesn't.

Cheers,
Ben.


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