From mboxrd@z Thu Jan  1 00:00:00 1970
From: Gerd Hoffmann <kraxel@suse.de>
Subject: Re: [patch 6/6] netif_release_rx_bufs
Date: Fri, 18 Aug 2006 08:43:06 +0200
Message-ID: <44E5617A.20003@suse.de>
References: <C10A4FDF.103B%Keir.Fraser@cl.cam.ac.uk>
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To: Keir Fraser <Keir.Fraser@cl.cam.ac.uk>
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Keir Fraser wrote:
> 
>> How can I do that?  gnttab_end_foreign_transfer_ref() doesn't cut it, it
>> will not succeed unconditionally ...
> 
> The function will not spin unboundedly and, when it returns, the grant is
> definitely no longer active. If any page was transferred via the grant, it
> is returned to the caller (else zero is returned). It does just what you
> need.

Oh, ok.  I assumed zero return means it failed.  Guess I just have to
keep track of the original mfns so I can map them back into the address
space in case no page was transfered, right?

cheers,
  Gerd

-- 
Gerd Hoffmann <kraxel@suse.de>
http://www.suse.de/~kraxel/julika-dora.jpeg