Re: CVS commit: [vmlocking] src/sys/kern

[Andrew Doran <ad%netbsd.org@localhost>]

On Sun, Sep 09, 2007 at 07:56:02PM -0700, Jason Thorpe wrote:

> On Sep 9, 2007, at 4:17 PM, Andrew Doran wrote:
> 
> >- Re-enable pool_cache, since it works on i386 again after today's  
> >pmap
> > change. pool_cache_invalidate() no longer invalidates objects stored
> > in the per-CPU caches. This needs some thought.
> 
> Then how do you invalidate the per-CPU caches?  That needs to be fixed.

My working idea is to use a cross call to invalidate them so that a lock
isn't needed to protect the per-CPU data. That shouldn't be a problem for
the pagedaemon but since they can take "a while" to run through there may be
other areas where it's not a goer. I'd really like to avoid adding a lock so
it's a case of whether not that's a crosscall is generally viable, I think.

Andrew