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Date: Tue, 10 Jan 2017 13:54:22 +0000 From: Wei Liu <wei.liu2@...rix.com> To: Juergen Gross <jgross@...e.com> CC: <linux-kernel@...r.kernel.org>, <xen-devel@...ts.xenproject.org>, <netdev@...r.kernel.org>, <boris.ostrovsky@...cle.com>, <wei.liu2@...rix.com>, <paul.durrant@...rix.com> Subject: Re: [PATCH 0/2] xen/net: limit number of tx/rx queues On Tue, Jan 10, 2017 at 02:32:50PM +0100, Juergen Gross wrote: > The Xen network frontend/backend supports multiple tx/rx queues for one > virtual interface. The number of queues supported by the backend is > set to the number of cpus of the backend driver domain (usually dom0) > and the number of queues requested by the frontend is limited by the > number of vcpus of the related guest. > > On large systems this can lead to ridiculous large number of queues > exhausting the required number of grant pages rather quick. > > To avoid this limit the default maximum on both sides to 8. Both > frontend and backend maximum can be individually tuned via module > parameters. > > Juergen Gross (2): > xen/netfront: set default upper limit of tx/rx queues to 8 > xen/netback: set default upper limit of tx/rx queues to 8 > Acked-by: Wei Liu <wei.liu2@...rix.com>
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