From: "Chen, Kenneth W" <kenneth.w.chen@intel.com>
To: linux-ia64@vger.kernel.org
Subject: RE: Initialization of cr.dcr
Date: Fri, 03 Jun 2005 18:11:25 +0000 [thread overview]
Message-ID: <200506031811.j53IBNg30320@unix-os.sc.intel.com> (raw)
In-Reply-To: <42A01CA2.8010209@hob.de>
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
next prev parent reply other threads:[~2005-06-03 18:11 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-06-03 9:02 Initialization of cr.dcr Christian Hildner
2005-06-03 18:11 ` Chen, Kenneth W [this message]
2005-06-03 18:27 ` Russ Anderson
2005-06-03 19:05 ` Chen, Kenneth W
2005-06-03 19:11 ` David Mosberger
2005-06-03 19:26 ` Chen, Kenneth W
2005-06-06 8:09 ` Christian Hildner
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