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xen-devel
Re: [Xen-devel] Re: [PATCH] Remus breaks the build
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To: |
Brendan Cully <brendan@xxxxxxxxx> |
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Subject: |
Re: [Xen-devel] Re: [PATCH] Remus breaks the build |
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From: |
Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx> |
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Date: |
Wed, 18 Aug 2010 14:40:47 +0100 |
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Cc: |
Jeremy Fitzhardinge <jeremy@xxxxxxxx>, "Xen-devel@xxxxxxxxxxxxxxxxxxx" <Xen-devel@xxxxxxxxxxxxxxxxxxx>, Dulloor <dulloor@xxxxxxxxx>, Stabellini <stefano.stabellini@xxxxxxxxxxxxx>, Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>, Stefano, Ian Campbell <Ian.Campbell@xxxxxxxxxx> |
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Wed, 18 Aug 2010 06:43:09 -0700 |
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Brendan Cully writes ("Re: [Xen-devel] Re: [PATCH] Remus breaks the build"):
> We need a second module (IFB or IMQ, depending on the kernel version)
> because Linux queueing disciplines only operate on a device's outbound
> traffic. Since Remus runs in dom0, it sees the guest's outbound
> traffic as _inbound_ traffic on a VIF device. So IMQ/IFB is used to
> redirect that incoming VIF traffic to a virtual intermediate device
> with the sch_queue queueing discipline installed on it.
Couldn't this be achieved simply by putting a dummy bridge or tap
device in the way or something ? You seem to be describing a device
driver whose sole purpose is plumbing ...
Ian.
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