linux-kernel - Re: Patch workqueue: create new slab cache instead of hacking

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Message-ID: <alpine.DEB.2.00.1203211255290.21932@router.home>
Date:	Wed, 21 Mar 2012 12:56:50 -0500 (CDT)
From:	Christoph Lameter <cl@...ux.com>
To:	Tejun Heo <tj@...nel.org>
cc:	Lai Jiangshan <laijs@...fujitsu.com>,
	Pekka Enberg <penberg@...nel.org>,
	Matt Mackall <mpm@...enic.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: Patch workqueue: create new slab cache instead of hacking

On Wed, 21 Mar 2012, Tejun Heo wrote:

> I don't know.  At this point, this is only for singlethread and
> unbound workqueues and we don't have too many of them left at this
> point.  I'd like to avoid creating a slab cache for this.  How about
> just leaving it be?  If we develop other use cases for larger
> alignments, let's worry about implementing something common then.

We could write a function that identifies a compatible kmalloc cache
or creates a new one if necessary. That would cut down overhead similar to
what slub merge is doing but allows more control by the developer.

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