netdev - RE: [PATCH 0/2] limit xen vnic max queues number to online cpu number

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Message-ID: <9AAE0902D5BC7E449B7C8E4E778ABCD02F6220AF@AMSPEX01CL01.citrite.net>
Date:	Fri, 23 Oct 2015 08:47:56 +0000
From:	Paul Durrant <Paul.Durrant@...rix.com>
To:	Joe Jin <joe.jin@...cle.com>, Wei Liu <wei.liu2@...rix.com>,
	Ian Campbell <Ian.Campbell@...rix.com>,
	Boris Ostrovsky <boris.ostrovsky@...cle.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	"David S. Miller" <davem@...emloft.net>
CC:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"xen-devel@...ts.xenproject.org" <xen-devel@...ts.xenproject.org>
Subject: RE: [PATCH 0/2] limit xen vnic max queues number to online cpu
 number

> -----Original Message-----
> From: netdev-owner@...r.kernel.org [mailto:netdev-
> owner@...r.kernel.org] On Behalf Of Joe Jin
> Sent: 23 October 2015 08:54
> To: Wei Liu; Ian Campbell; Boris Ostrovsky; Konrad Rzeszutek Wilk; David S.
> Miller
> Cc: netdev@...r.kernel.org; xen-devel@...ts.xenproject.org
> Subject: [PATCH 0/2] limit xen vnic max queues number to online cpu
> number
> 
> Currently xen vnic allowed to create lots of queues by set module param
> max_queues(both netback and netfront), when queues number larger than
> cpu number, it does not help for performance but need more cpu time.
> 

But it's an override, so why would you want to limit it? The parameter should not be set in the common case.

  Paul

> This patchset limit netback and netfront max queues number to online
> cpus number.
> 
> Joe Jin (2):
>   xen-netback: limit xen vif max queues number to online cpus
>   xen-front: limit vnic max_queues number to online cpus
> 
>  drivers/net/xen-netback/netback.c |   28 ++++++++++++++++++++++------
>  drivers/net/xen-netfront.c        |   27 +++++++++++++++++++++------
>  2 files changed, 43 insertions(+), 12 deletions(-)
> 
> --
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