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From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
To: David Vrabel <david.vrabel@citrix.com>
Cc: linux-kernel@vger.kernel.org,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
	x86@kernel.org, Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	xen-devel@lists.xenproject.org,
	Boris Ostrovsky <boris.ostrovsky@oracle.com>
Subject: Re: [PATCH 0/2] dma,x86,xen: fix dma_get_required_mask() when dma != phys address
Date: Mon, 12 May 2014 11:28:58 -0400	[thread overview]
Message-ID: <20140512152858.GI2837@phenom.dumpdata.com> (raw)
In-Reply-To: <1399889742-26165-1-git-send-email-david.vrabel@citrix.com>

On Mon, May 12, 2014 at 11:15:40AM +0100, David Vrabel wrote:
> x86 uses the generic dma_get_required_mask() which assumes that DMA
> address == physical address.  For Xen PV guests this is not the case
> and certain drivers will cause excessive use of the SWIOTLB.
> 
> Patch #1 is a straight forward refactoring of a common function.
> 
> Patch #2 addes the required arch-specific implementation of
> dma_get_required_mask() to x86.

David,

Thank you for taking a look at that. If you would like, you can
tack on Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

And with the *SWIOTLB maintainer hat on - you can add that tag
as well.

Thanks!
> 
> David
> 

  parent reply	other threads:[~2014-05-12 15:29 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-05-12 10:15 [PATCH 0/2] dma,x86,xen: fix dma_get_required_mask() when dma != phys address David Vrabel
2014-05-12 10:15 ` [PATCH 1/2] dma: add dma_get_required_mask_from_max_pfn() David Vrabel
2014-05-12 10:15 ` David Vrabel
2014-05-12 10:15   ` David Vrabel
2014-05-12 10:15 ` [PATCH 2/2] x86,xen: correct dma_get_required_mask() for Xen PV guests David Vrabel
2014-05-12 10:15 ` [PATCH 2/2] x86, xen: " David Vrabel
2014-05-12 15:28 ` Konrad Rzeszutek Wilk [this message]
2014-05-12 15:28 ` [PATCH 0/2] dma, x86, xen: fix dma_get_required_mask() when dma != phys address Konrad Rzeszutek Wilk
  -- strict thread matches above, loose matches on Subject: below --
2014-05-12 10:15 David Vrabel

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