linux-kernel - Re: [PATCHv6 0/9] x86/xen: fixes for mapping high MMIO regions (and remove _PAGE

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Message-ID: <5374DD84.20904@citrix.com>
Date:	Thu, 15 May 2014 16:30:12 +0100
From:	David Vrabel <david.vrabel@...rix.com>
To:	<xen-devel@...ts.xenproject.org>
CC:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Boris Ostrovsky <boris.ostrovsky@...cle.com>,
	<linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, <x86@...nel.org>,
	Mel Gorman <mgorman@...e.de>
Subject: Re: [PATCHv6 0/9] x86/xen: fixes for mapping high MMIO regions (and
 remove _PAGE_IOMAP)

On 15/04/14 15:15, David Vrabel wrote:
> This a fix for the problems with mapping high MMIO regions in certain
> cases (e.g., the RDMA drivers) as not all mappers were specifing
> _PAGE_IOMAP which meant no valid MFN could be found and the resulting
> PTEs would be set as not present, causing subsequent faults.

I've applied patches #1 to #6 to devel/for-linus-3.16.  These fix the
bug.  Patches #7 to #9 remove _PAGE_IOMAP but depend on an x86 change
which is not yet acked and I'm not going to delay (again) the bug fix
for this.

David
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