Subject: Re: [26-devel] v2.6 performance slowdown on MPC8xx: Measuring TLB cache misses

From: Dan Malek <[email-masked]>
Date: Sat, 23 Apr 2005 17:29:17 -0400

On Apr 23, 2005, at 1:35 PM, Joakim Tjernlund wrote:

> Is it possible to handle the _PAGE_ACCESSED handling at pte creation 
> in fault.c instead
> of doing it for every TLB miss? That should make the TLB Miss handler 
> faster.

No.  As part of VM management to determine working sets, it's possible 
to have
this flag change state but the page to remain valid.  The cost of 
setting this properly
in the miss handler is minimal compared to the other stuff that we 
should try
and streamline.

Thanks.

	-- Dan