linux-kernel - Re: [GIT PULL] SLAB changes for v3.10

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Message-ID: <0000013e846d76c8-d376963d-e953-4eff-92ea-742ba09cdb98-000000@email.amazonses.com>
Date:	Wed, 8 May 2013 13:56:06 +0000
From:	Christoph Lameter <cl@...ux.com>
To:	Tony Lindgren <tony@...mide.com>
cc:	Pekka Enberg <penberg@...nel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [GIT PULL] SLAB changes for v3.10

On Tue, 7 May 2013, Tony Lindgren wrote:

> OK got it narrowed down to CONFIG_DEBUG_SPINLOCK=y causing the problem
> with commit 8a965b3b. Ain't nothing like bisecting and booting and then
> diffing .config files on top of that.
>
> > Without reverting 8a965b3b I'm getting:

The patch (commit 8a965b3baa89ffedc73c0fbc750006c631012ced) merely changed the sequence of
slab creation to address an issue in SLAB.

Hmmm.. But if KMALLOC_SHIFT_LOW is higher than 6 or 7 then the creation of
the non-power of two slab could be skipped as a result of the patch. But
we should not need them in those cases.

Can I see the kernel config?

What is the value of KMALLOC_SHIFT_LOW?

Can you figure out which kernel slab the function is trying to access?

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