linux-kernel - Re: [PATCH] slub: fix check

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Message-ID: <CAC5umyg=zq7BxSrFLtkkpMpKheW7k++KLmQkAfmk56vKn8EykQ@mail.gmail.com>
Date:	Tue, 9 Aug 2011 10:08:12 +0900
From:	Akinobu Mita <akinobu.mita@...il.com>
To:	Marcin Slusarz <marcin.slusarz@...il.com>
Cc:	linux-kernel@...r.kernel.org,
	Christoph Lameter <cl@...ux-foundation.org>,
	Pekka Enberg <penberg@...nel.org>,
	Matt Mackall <mpm@...enic.com>, linux-mm@...ck.org
Subject: Re: [PATCH] slub: fix check_bytes() for slub debugging

2011/8/9 Marcin Slusarz <marcin.slusarz@...il.com>:

> I tested your patch to check if performance improvements of commit
> c4089f98e943ff445665dea49c190657b34ccffe come from this bug or not.
> And forunately they aren't - performance is exactly the same.

That's good to know.

> How did you find it?

When I tried to reuse it in mm/debug-pagealloc.c, I realized that
check_bytes() didn't work with 0xaa.
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