From: David Gibson <david@gibson.dropbear.id.au>
To: linuxppc-embedded@lists.linuxppc.org
Subject: Do we need tlbsx at finish_tlb_load?
Date: Thu, 30 May 2002 18:04:34 +1000 [thread overview]
Message-ID: <20020530080434.GY16537@zax> (raw)
A question to Dan and Tom in particular:
At the moment on 4xx, just after finish_tlb_load, which is called by
both the TLB miss handlers, we do a tlbsx to see if an entry for this
virtual address already exists.
Since this code is only called from the TLB miss handler, I can't see
how there could ever be a valid TLB entry present at this point.
There is a comment claiming that this path can be hit under some
circumstances, but it doesn't make sense to me.
Is there any situation where we can reach this point with a valid TLB
entry existing for the faulting address?
--
David Gibson | For every complex problem there is a
david@gibson.dropbear.id.au | solution which is simple, neat and
| wrong. -- H.L. Mencken
http://www.ozlabs.org/people/dgibson
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
next reply other threads:[~2002-05-30 8:04 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-05-30 8:04 David Gibson [this message]
2002-06-03 2:43 ` Do we need tlbsx at finish_tlb_load? David Gibson
2002-06-04 0:19 ` Dan Malek
2002-06-04 3:48 ` David Gibson
2002-06-04 12:52 ` Paul Mackerras
2002-06-04 17:49 ` Dan Malek
2002-06-06 2:04 ` Paul Mackerras
2002-06-06 5:06 ` Dan Malek
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