Re: [Xen-devel] [patch 6/6] netif_release_rx_bufs

[Gerd Hoffmann <kraxel@xxxxxxx>]

Keir Fraser wrote:
>> I think we need either a way to get back pages with transfer grants
>> without cooperation from the backend driver, or we need some way to say
>> "pretty pretty please, give me back my rx buffers" to the netback driver.
> 
> Unlike a map grant, you can reclaim a transfer grant at any time. The only
> question is whether it has been used to transfer a page, or not.

How can I do that?  gnttab_end_foreign_transfer_ref() doesn't cut it, it
will not succeed unconditionally ...

cheers,
  Gerd

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

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