linux-kernel - Re: [RFC PATCH v3 2/5] powerpc: Exception hooks for context tracking subsystem

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Date:	Mon, 13 May 2013 20:01:45 +1000
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Li Zhong <zhong@...ux.vnet.ibm.com>
Cc:	linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
	paulmck@...ux.vnet.ibm.com, fweisbec@...il.com, paulus@...ba.org,
	michael@...erman.id.au
Subject: Re: [RFC PATCH v3 2/5] powerpc: Exception hooks for context
 tracking subsystem

On Mon, 2013-05-13 at 17:46 +0800, Li Zhong wrote:
> > hash_page() won't start a new RCU, at least not in its current incarnation,
> > the only thing I can see it ever doing would be to take some RCU read locks one
> > day (it doesn't today).
> 
> Seems I added the hooks because of the trace point of hcall
> entry/exit ...

Oh I see, and trace points use RCU ... ok, leave it there then.

Cheers,
Ben.


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