linux-kernel - Re: SLUB regression in current Linus

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Message-ID: <alpine.DEB.2.00.1105251130200.26118@router.home>
Date:	Wed, 25 May 2011 11:31:42 -0500 (CDT)
From:	Christoph Lameter <cl@...ux.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	James Morris <jmorris@...ei.org>,
	Pekka Enberg <penberg@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: SLUB regression in current Linus

On Wed, 25 May 2011, Eric Dumazet wrote:

> > We always fall back to the slow path in the debug case. So the tid update
> > is useless.
>
> tid change is updated anyway at the end of deactivate_slab()

That too is useless in the debug case since we already disable
interrupts and do not need tid based synchronization.

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