linux-kernel - Re: [PATCH] grant-table: don't set m2p override if kmap

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Message-ID: <5278D5D3.1020605@citrix.com>
Date:	Tue, 5 Nov 2013 12:26:11 +0100
From:	Roger Pau Monné <roger.pau@...rix.com>
To:	<xen-devel@...ts.xen.org>, <linux-kernel@...r.kernel.org>
CC:	Roger Pau Monne <roger.pau@...rix.com>,
	Matt Wilson <msw@...zon.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	David Vrabel <david.vrabel@...rix.com>,
	Boris Ostrovsky <boris.ostrovsky@...cle.com>
Subject: Re: [PATCH] grant-table: don't set m2p override if kmap_ops is not
 set

On 05/11/13 12:24, Roger Pau Monne wrote:
> IMHO there's no reason to set a m2p override if the mapping is done in
> kernel space, so only set the m2p override when kmap_ops is set.
> 
> When kmap_ops is not set, just set the correct p2m translation, this
> avoids touching the m2p lock, reducing contention around it.
> 
> Signed-off-by: Roger Pau Monné <roger.pau@...rix.com>
> Reported-by: Matt Wilson <msw@...zon.com>
> Cc: Matt Wilson <msw@...zon.com>
> Cc: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
> Cc: David Vrabel <david.vrabel@...rix.com>
> Cc: Boris Ostrovsky <david.vrabel@...rix.com>

Sorry Boris, I got your address wrong.

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