Re: [PATCH net-net 0/4] Increase the limit of tuntap queues

On Wed, Nov 19, 2014 at 03:16:28PM -0500, David Miller wrote:

quoted

From: Pankaj Gupta <redacted>
Date: Tue, 18 Nov 2014 21:52:54 +0530

quoted

- 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.

We can configure some fixed number of queues like 16 or so at the start 
if multiqueue is enabled and then if somebody needs more then that, they
can do on their own.

If we dont want anyone to directly increase the number of queues, we can add
an ioctl command for increasing number of queues?



Suggestions here. 

Well it will run host out of kernel, no?

--
MST