From: Dan Malek <dan@embeddededge.com>
To: Marcelo Tosatti <marcelo.tosatti@cyclades.com>
Cc: Joakim Tjernlund <Joakim.Tjernlund@lumentis.se>,
linuxppc-embedded@ozlabs.org
Subject: Re: 8xx v2.6 TLB problems and suggested workaround
Date: Thu, 7 Apr 2005 22:09:58 -0400 [thread overview]
Message-ID: <19116173cb07648317c2a73a9c822c70@embeddededge.com> (raw)
In-Reply-To: <20050407193846.GE19449@logos.cnet>
On Apr 7, 2005, at 3:38 PM, Marcelo Tosatti wrote:
> Would be nice to have someone from 8xx team look into this?
I'll look into it and find some solution. I suspect it is an
interaction with the previous TLB miss and the behavior
of the dcbst TLB look up. Perhaps, if we ensure the
TLB entry is not valid at the time of the dcbst, it will work.
This is why the tlbie() I added as a hack a long time
ago made the "problem" disappear. The other dcbxx
instructions in the code work on already existing pages,
while this one is a special case of a miss on a page
that doesn't exist.
Thanks.
-- Dan
next prev parent reply other threads:[~2005-04-08 2:10 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
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 [this message]
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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