Re: VFS reclaims are scarce on netbsd-6

["J. Hannken-Illjes" <hannken%eis.cs.tu-bs.de@localhost>]

On Apr 13, 2012, at 1:41 PM, Emmanuel Dreyfus wrote:

> I run my perfuse/glusterfs tests on netbsd-6 branch, and I noticed that
> I reclaims operations can lag for a long time. After running for a
> while, perfused knows about 25217 nodes, most of them idle for hours.
> Then kernel will start sending reclaims for old nodes when it wants to
> lookup a new one.

VFS will cache up to kern.maxvnodes vnodes before it starts reclaiming
vnodes to make space for new ones.

> Is this an intended behavior? That consumes perfused and glusterfsd
> memory for no benefit.

Why is there no benefit of cached nodes?

> Do I have a way to tell the kernel I would like a
> more aggressive recycling policy?

You could lower kern.maxvnodes then ...

--
Juergen Hannken-Illjes - hannken%eis.cs.tu-bs.de@localhost - TU Braunschweig 
(Germany)