Date: Wed, 19 Nov 2014 22:44:27 +0200
From: "Michael S. Tsirkin" <mst@redhat.com>
To: David Miller <davem@davemloft.net>
Cc: pagupta@redhat.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
        jasowang@redhat.com, dgibson@redhat.com, vfalico@gmail.com,
        edumazet@google.com, vyasevic@redhat.com, hkchu@google.com,
        wuzhy@linux.vnet.ibm.com, xemul@parallels.com, therbert@google.com,
        bhutchings@solarflare.com, xii@google.com, stephen@networkplumber.org,
        jiri@resnulli.us, sergei.shtylyov@cogentembedded.com
Subject: Re: [PATCH net-net 0/4] Increase the limit of tuntap queues
Message-ID: <20141119204427.GB30994@redhat.com>
References: <1416327778-17716-1-git-send-email-pagupta@redhat.com>
 <20141119.151628.768548269128919029.davem@davemloft.net>
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On Wed, Nov 19, 2014 at 03:16:28PM -0500, David Miller wrote:
> From: Pankaj Gupta <pagupta@redhat.com>
> Date: Tue, 18 Nov 2014 21:52:54 +0530
> 
> > - Accept maximum number of queues as sysctl param so that any user space 
> >   application like libvirt can use this value to limit number of queues. Also
> >   Administrators can specify maximum number of queues by updating this sysctl
> >   entry.
> 
> This is the only part I don't like.
> 
> Just let whoever has privileges to configure the tun device shoot
> themselves in the foot if they want to by configuring "too many"
> queues.
> 
> If the virtual entity runs itself out of resources by doing something
> stupid, it's purely their problem.

Well it will run host out of kernel, no?

-- 
MST
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