RE: Initialization of cr.dcr

From: Chen, Kenneth W <kenneth.w.chen_at_intel.com>
Date: 2005-06-04 04:11:25
Christian Hildner wrote on Friday, June 03, 2005 2:02 AM
> playing around with speculation I found that on initialization dcr.dm is 
> not set, while the comment says "Initialize default control register to 
> defer all speculative faults". To be conform to the comment (and also to 
> the expected behavior) the value IA64_DCR_DM should be added in 
> arch/ia64/kernel/setup.c.

It should be the other way around: update the comments to reflect what
the code does.  Turning off dcr.dm is a big win for speculative load
where you do want the tlb miss to be serviced up front.

- Ken

-
To unsubscribe from this list: send the line "unsubscribe linux-ia64" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Received on Fri Jun 3 14:15:38 2005

This archive was generated by hypermail 2.1.8 : 2005-08-02 09:20:39 EST