Re: [rfc v2 3/6] dma-pool: dynamically expanding atomic pools

[David Rientjes]

On Tue, 14 Apr 2020, Christoph Hellwig wrote:

> > I'll rely on Christoph to determine whether it makes sense to add some 
> > periodic scavening of the atomic pools, whether that's needed for this to 
> > be merged, or wheter we should enforce some maximum pool size.
> 
> I don't really see the point.  In fact the only part of the series
> I feel uneasy about is the growing of the pools, because it already
> adds a fair amount of complexity that we might not need for simple
> things, but shrinking really doesn't make any sense.  So I'm tempted
> to not ever support shrinking, and even make growing optional code under
> a new config variable.  We'll also need a way to query the current size
> through e.g. a debugfs file.
> 

New debugfs file sounds good, I'll add it.  If we want to disable dynamic 
expansion when the pool is depleted under a new config option, let me 
know.