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Re: [Xen-devel] using GNTTABOP_transfer on hvm guests
| To: | Olaf Hering <olaf@xxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] using GNTTABOP_transfer on hvm guests |
| From: | Keir Fraser <keir@xxxxxxx> |
| Date: | Sat, 25 Sep 2010 07:46:28 +0100 |
| Cc: | |
| Delivery-date: | Fri, 24 Sep 2010 23:47:14 -0700 |
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| Thread-topic: | [Xen-devel] using GNTTABOP_transfer on hvm guests |
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On 24/09/2010 21:33, "Olaf Hering" <olaf@xxxxxxxxx> wrote: > > While looking for more missing p2m_is_paging(p2mt) checks I noticed that > also the GNTTABOP_transfer code path may return GNTST_eagain if all code > paths get changed to verify the p2mt. > But can this really happen? Reading the comments for > MODPARM_rx_copy/MODPARM_rx_flip in drivers/xen/netfront/netfront.c > indicates that hvm guests will not use the GNTTABOP_transfer path. > > Are there any possible users for GNTTABOP_transfer in a hvm guest? > Could xenpaging ever work for paravirtualized guests? GNTTABOP_transfer used to be used in our pv network drivers, but was superceded years ago. It's really never used these days. -- Keir > Olaf > > > _______________________________________________ > Xen-devel mailing list > Xen-devel@xxxxxxxxxxxxxxxxxxx > http://lists.xensource.com/xen-devel _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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