From: Marcelo Tosatti <marcelo.tosatti@cyclades.com>
To: Joakim Tjernlund <Joakim.Tjernlund@lumentis.se>
Cc: linuxppc-embedded@ozlabs.org
Subject: Re: 8xx v2.6 TLB problems and suggested workaround
Date: Wed, 6 Apr 2005 09:16:49 -0300 [thread overview]
Message-ID: <20050406121649.GC11066@logos.cnet> (raw)
In-Reply-To: <BCEFJBPJCGFCNMMMIDBHEEFNCLAA.Joakim.Tjernlund@lumentis.se>
On Tue, Apr 05, 2005 at 11:51:42PM +0200, Joakim Tjernlund wrote:
> Hi Marcelo
>
> Reading your report it doesn't sound likely but I will ask anyway:
> Is it possible that the problem you are seeing isn't caused by the
> "famous" CPU bug mentioned here:
> http://ozlabs.org/pipermail/linuxppc-embedded/2005-January/016351.html
>
> The DTLB error handler needs DAR to be set correctly and since the
> dcbX instructions doesn't set DAR in either DTLB Miss nor DTLB Error you
> may end up trying to fix the wrong address.
Hi Joakim,
First of all, thanks your care!
Well, I dont think the above issue is exactly what we're hitting because
DAR is correctly updated on our case with "dcbst".
The problem is that it is treated as a write operation, but shouldnt.
Maybe it is related to dcbst's inability to set DAR?
BTW, about the CPU15 bug fix, has there been any effort to port/merge
it in v2.6 ?
next prev parent reply other threads:[~2005-04-06 20:45 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-04-05 21:51 8xx v2.6 TLB problems and suggested workaround Joakim Tjernlund
2005-04-06 12:16 ` Marcelo Tosatti [this message]
2005-04-06 21:24 ` Joakim Tjernlund
2005-04-07 12:00 ` Marcelo Tosatti
2005-04-07 20:35 ` Joakim Tjernlund
2005-04-07 19:38 ` Marcelo Tosatti
2005-04-08 2:09 ` Dan Malek
2005-04-08 11:07 ` Marcelo Tosatti
2005-04-09 5:16 ` Dan Malek
2005-04-09 19:03 ` Joakim Tjernlund
2005-04-09 22:37 ` Marcelo Tosatti
2005-04-10 10:08 ` Joakim Tjernlund
2005-04-22 17:14 ` Marcelo Tosatti
2005-04-23 21:55 ` Dan Malek
2005-04-23 22:07 ` Joakim Tjernlund
2005-04-23 22:23 ` Dan Malek
2005-04-08 8:01 ` Joakim Tjernlund
2005-04-08 13:39 ` Dan Malek
2005-04-08 14:29 ` Joakim Tjernlund
-- strict thread matches above, loose matches on Subject: below --
2005-04-04 19:17 Marcelo Tosatti
2005-04-04 20:09 ` Marcelo Tosatti
2005-04-05 7:08 ` Pantelis Antoniou
2005-04-05 1:11 ` Kumar Gala
2005-04-05 15:58 ` Dan Malek
2005-04-05 11:41 ` Marcelo Tosatti
2005-04-05 20:26 ` Marcelo Tosatti
2005-04-06 6:00 ` Pantelis Antoniou
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