linux-kernel - Re: [GIT PULL] last minute percpu fix for v3.15-rc8

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Message-ID: <alpine.DEB.2.10.1406041327240.12812@gentwo.org>
Date:	Wed, 4 Jun 2014 13:28:09 -0500 (CDT)
From:	Christoph Lameter <cl@...two.org>
To:	Tejun Heo <tj@...nel.org>
cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Kent Overstreet <kmo@...erainc.com>,
	Sebastian Ott <sebott@...ux.vnet.ibm.com>,
	Heiko Carstens <heiko.carstens@...ibm.com>
Subject: Re: [GIT PULL] last minute percpu fix for v3.15-rc8

On Wed, 4 Jun 2014, Tejun Heo wrote:

>
> Given that percpu operations can be performed on any allocated percpu
> area, it's a bit difficult to achieve tho.  The only way I can think
> of is percpu allocator creating lockdep key for all the allocated
> offsets which isn't too enticing. :(

Hmmm.. Or an annotation for a percpu variable saying that its being used
from an interrupt context.

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