svn commit: r251894 - in head: lib/libmemstat sys/vm

[Alfred Perlstein]

On 6/18/13 4:37 AM, Gleb Smirnoff wrote:
> On Tue, Jun 18, 2013 at 10:25:08AM +0200, Andre Oppermann wrote:
> A> There used to be a problem with per CPU caches accumulating large amounts
> A> of items without freeing back to the global (or socket) pool.
> A>
> A> Do these updates to UMA change this situation and/or do you have further
> A> improvements coming up?
>
> This is especially a problem with ZFS, which utilizes UMA extensively.
>
> IMHO, we need a flag for uma_zcreate() that would disable per CPU caches, so
> that certain zones (ZFS at least) would have them off.
>
> It might be a good idea to force this flag on every zone that has allocation >=
> then the page size.
>
What about people running with 256GB+ ram?  Do they also want the per 
cpu caches off?

-- 
Alfred Perlstein
VP Software Engineering, iXsystems