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Re: [Xen-devel][Pv-ops][PATCH] Netback multiple tasklet support

To: Jan Beulich <JBeulich@xxxxxxxxxx>
Subject: Re: [Xen-devel][Pv-ops][PATCH] Netback multiple tasklet support
From: Ian Campbell <Ian.Campbell@xxxxxxxxxx>
Date: Fri, 11 Dec 2009 09:34:42 +0000
Cc: Steven Smith <Steven.Smith@xxxxxxxxxxxxx>, Jeremy Fitzhardinge <jeremy@xxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Ian Pratt <Ian.Pratt@xxxxxxxxxxxxx>, Dongxiao Xu <dongxiao.xu@xxxxxxxxx>
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On Fri, 2009-12-11 at 08:34 +0000, Jan Beulich wrote:
> 
> Btw., can any of you explain why 2.6.18 needs this (and the related)
> code,but pv-ops doesn't? 

The 2.6.18 bits came from
http://xenbits.xensource.com/linux-2.6.18-xen.hg?rev/a395e58bd234

I can't immediately see why this wouldn't apply to pv ops too. There are
comments in drivers/pci/xen-iommu.c (e.g. in xen_dma_unmap_page) which
suggest someone has though about it at some point...

Ian.


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