Re: [Xen-devel] [PATCH 0/2] limit xen vnic max queues number to online cpu number

[Paul Durrant <Paul.Durrant@xxxxxxxxxx>]

> -----Original Message-----
> From: netdev-owner@xxxxxxxxxxxxxxx [mailto:netdev-
> owner@xxxxxxxxxxxxxxx] 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@xxxxxxxxxxxxxxx; xen-devel@xxxxxxxxxxxxxxxxxxxx
> 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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