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Re: Troubles with TLB refills

To: ldavies@oz.agile.tv
Subject: Re: Troubles with TLB refills
From: Ralf Baechle <ralf@oss.sgi.com>
Date: Tue, 6 Mar 2001 13:58:56 +0100
Cc: linux-mips@oss.sgi.com
In-reply-to: <3AA45523.CDF351CB@agile.tv>; from ldavies@agile.tv on Tue, Mar 06, 2001 at 01:10:27PM +1000
References: <3AA30A91.B5842678@agile.tv> <20010305114926.A26862@bacchus.dhis.org> <3AA45523.CDF351CB@agile.tv>
Sender: owner-linux-mips@oss.sgi.com
User-agent: Mutt/1.2.5i
On Tue, Mar 06, 2001 at 01:10:27PM +1000, Liam Davies wrote:

> in terms of instruction encodings. I would have thought the cpu would have
> crapped out when it hit bad instructions. So it would seem the
> exceptions were occurring but the code that it was executing wasn't even code.
> Hence my assumption that we never got a TLB refill., even though the fault
> handler was being called.

Probably somewhere in the garbage there was another memory reference
which resulted in a second TLB exception, at that time a store to 0x10004f4c
which then got handled via the general exception handler and resulted in
do_page_fault being called.

  Ralf

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