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[Xen-API] Re: [Xen-devel] Re: [PATCH] ethtool: ETHTOOL_SFEATURES: remove

To: Michał Mirosław <mirq-linux@xxxxxxxxxxxx>
Subject: [Xen-API] Re: [Xen-devel] Re: [PATCH] ethtool: ETHTOOL_SFEATURES: remove NETIF_F_COMPAT return
From: Ian Campbell <Ian.Campbell@xxxxxxxxxx>
Date: Sat, 28 May 2011 11:07:08 +0100
Cc: dev@xxxxxxxxxxxxxxx, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, "netdev@xxxxxxxxxxxxxxx" <netdev@xxxxxxxxxxxxxxx>, xen-api@xxxxxxxxxxxxxxxxxxx, Ben Hutchings <bhutchings@xxxxxxxxxxxxxx>, David Miller <davem@xxxxxxxxxxxxx>
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On Sat, 2011-05-28 at 08:35 +0100, Michał Mirosław wrote:
> On Sat, May 28, 2011 at 12:25:55AM +0100, Ben Hutchings wrote:
> > On Fri, 2011-05-27 at 18:34 +0200, Michał Mirosław wrote:
> > > On Fri, May 27, 2011 at 04:45:50PM +0100, Ben Hutchings wrote:
> > > > On Fri, 2011-05-27 at 17:28 +0200, Michał Mirosław wrote:
> > [...]
> > > > >      (note: ETHTOOL_S{SG,...} are not ever going away)
> > > > >    - causes NETIF_F_* to be an ABI
> > > > If feature flag numbers are not stable then what is the point of
> > > > /sys/class/net/<name>/features?  Also, I'm not aware that features have
> > > > ever been renumbered in the past.
> > > Since no NETIF_F_* were exported earlier, I assume 
> > > /sys/class/net/*/features
> > > is a debugging aid. What is it used for besides that?
> > xen-api <https://github.com/xen-org/xen-api> uses it in
> > scripts/InterfaceReconfigureVswitch.py.  Though it doesn't seem to be
> > used for a particularly good reason...
> 
> Look like it should use ETHTOOL_GFLAGS instead for netdev_has_vlan_accel().
> 
> Best Regards,
> Michał Mirosław
> 
> [added Cc: xen-devel]

added Cc: xen-api list and dev@openvswitch as well.

Complete thread is at
http://thread.gmane.org/gmane.linux.network/195552/focus=197019

Ian.



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