From: David Vrabel <david.vrabel@citrix.com>
To: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Cc: "Wei Liu" <wei.liu2@citrix.com>,
jonathan.davies@citrix.com,
"Ian Campbell" <ian.campbell@citrix.com>,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
"Zoltan Kiss" <zoltan.kiss@citrix.com>,
xen-devel@lists.xenproject.org,
"Roger Pau Monné" <roger.pau@citrix.com>,
"Konrad Rzeszutek Wilk" <konrad.wilk@oracle.com>
Subject: Re: [Xen-devel] [PATCH net-next v3 1/9] xen-netback: Introduce TX grant map definitions
Date: Thu, 9 Jan 2014 18:23:25 +0000 [thread overview]
Message-ID: <52CEE91D.50105@citrix.com> (raw)
In-Reply-To: <alpine.DEB.2.02.1401091759100.21510@kaball.uk.xensource.com>
On 09/01/14 18:09, Stefano Stabellini wrote:
>
> I agree, but I think that we have different views on the use case.
> To me the m2p_override use case is "everywhere an mfn_to_pfn translation
> is required", that unfortunately is potentially everywhere at this time.
mfn_to_pfn() cannot be made to work correctly with foreign MFNs. It's a
fundamentally unsolvable problem.
IMO, the only sensible use of the m2p_override is to cause mfn_to_pfn()
to BUG() if a foreign MFN is used.
David
next prev parent reply other threads:[~2014-01-09 18:23 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-08 0:10 [PATCH net-next v2 0/9] xen-netback: TX grant mapping with SKBTX_DEV_ZEROCOPY instead of copy Zoltan Kiss
2014-01-08 0:10 ` [PATCH net-next v3 1/9] xen-netback: Introduce TX grant map definitions Zoltan Kiss
2014-01-08 1:29 ` David Miller
2014-01-08 14:08 ` Zoltan Kiss
2014-01-09 15:30 ` Wei Liu
2014-01-09 15:42 ` David Vrabel
2014-01-09 17:28 ` [Xen-devel] " Stefano Stabellini
2014-01-09 17:46 ` David Vrabel
2014-01-09 18:09 ` Stefano Stabellini
2014-01-09 18:23 ` David Vrabel [this message]
2014-01-09 15:49 ` Roger Pau Monné
2014-01-09 19:53 ` Zoltan Kiss
2014-01-08 0:10 ` [PATCH net-next v3 2/9] xen-netback: Change TX path from grant copy to mapping Zoltan Kiss
2014-01-09 15:30 ` Wei Liu
2014-01-10 11:35 ` Zoltan Kiss
2014-01-10 11:45 ` Wei Liu
2014-01-10 13:16 ` Wei Liu
2014-01-10 15:24 ` Zoltan Kiss
2014-01-10 16:02 ` [Xen-devel] " David Vrabel
2014-01-10 16:08 ` Wei Liu
2014-01-12 23:19 ` Zoltan Kiss
2014-01-08 0:10 ` [PATCH net-next v3 3/9] xen-netback: Remove old TX grant copy definitons and fix indentations Zoltan Kiss
2014-01-08 0:10 ` [PATCH net-next v3 4/9] xen-netback: Change RX path for mapped SKB fragments Zoltan Kiss
2014-01-08 0:10 ` [PATCH net-next v3 5/9] xen-netback: Add stat counters for zerocopy Zoltan Kiss
2014-01-08 0:10 ` [PATCH net-next v3 6/9] xen-netback: Handle guests with too many frags Zoltan Kiss
2014-01-08 2:12 ` Eric Dumazet
2014-01-08 13:49 ` Zoltan Kiss
2014-01-08 13:54 ` Eric Dumazet
2014-01-08 14:13 ` Zoltan Kiss
2014-01-08 0:10 ` [PATCH net-next v3 7/9] xen-netback: Add stat counters for frag_list skbs Zoltan Kiss
2014-01-08 0:10 ` [PATCH net-next v3 8/9] xen-netback: Timeout packets in RX path Zoltan Kiss
2014-01-08 21:34 ` Zoltan Kiss
2014-01-09 9:20 ` Paul Durrant
2014-01-13 0:20 ` Zoltan Kiss
2014-01-13 9:53 ` Paul Durrant
2014-01-08 0:10 ` [PATCH net-next v3 9/9] xen-netback: Aggregate TX unmap operations Zoltan Kiss
2014-01-08 0:16 ` [PATCH net-next v2 0/9] xen-netback: TX grant mapping with SKBTX_DEV_ZEROCOPY instead of copy Zoltan Kiss
2014-01-08 14:43 ` Wei Liu
2014-01-08 14:44 ` Zoltan Kiss
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