linux-kernel - Re: [PATCH 10/15] powerpc/mm: Add hooks for cxl

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Message-ID: <20140926232447.30bdcddb@kryten>
Date:	Fri, 26 Sep 2014 23:24:47 +1000
From:	Anton Blanchard <anton@...ba.org>
To:	Michael Neuling <mikey@...ling.org>
Cc:	greg@...ah.com, arnd@...db.de, mpe@...erman.id.au,
	benh@...nel.crashing.org, linux-kernel@...r.kernel.org,
	linuxppc-dev@...abs.org, jk@...abs.org, imunsie@...ibm.com,
	cbe-oss-dev@...ts.ozlabs.org
Subject: Re: [PATCH 10/15] powerpc/mm: Add hooks for cxl


Hi Mikey,

> We only map what a user processes maps and we tear it down when the
> process is teared down (on the file descriptor release).  So I think
> we are ok.  
> 
> Unless there's some lazy teardown you're alluding to that I'm missing?

I was trying to make sure things like the TLB batching code won't allow
a tlbie to be postponed until after a CAPI mapping is destroyed. It's
been ages since I looked at that part of the mm code.

Anton
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