On Sep 10, 2007, at 2:16 AM, Andrew Doran wrote:

> 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.

Sun didn't seem to think that a lock would be too terrible in this  
case.  Why not take their advice?

-- thorpej