linux-kernel - Re: [RFC v2] percpu: Add a separate function to merge free areas

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Message-ID: <alpine.DEB.2.11.1412041520270.14925@gentwo.org>
Date:	Thu, 4 Dec 2014 15:20:40 -0600 (CST)
From:	Christoph Lameter <cl@...ux.com>
To:	Tejun Heo <tj@...nel.org>
cc:	Al Viro <viro@...IV.linux.org.uk>,
	Leonard Crestez <lcrestez@...acom.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, Sorin Dumitru <sdumitru@...acom.com>
Subject: Re: [RFC v2] percpu: Add a separate function to merge free areas

On Thu, 4 Dec 2014, Tejun Heo wrote:

> Docker usage is pretty wide-spread now, making what used to be
> siberia-cold paths hot enough to cause actual scalability issues.
> Besides, we're now using percpu_ref for things like aio and cgroup
> control structures which can be created and destroyed quite
> frequently.  I don't think we can say these are "weird" use cases
> anymore.

Well then lets write a scalable percpu allocator.

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