From mboxrd@z Thu Jan 1 00:00:00 1970 Received: (from majordomo@localhost) by oss.sgi.com (8.11.2/8.11.3) id g0UC3FX21641 for linux-mips-outgoing; Wed, 30 Jan 2002 04:03:15 -0800 Received: from dea.linux-mips.net (a1as16-p145.stg.tli.de [195.252.192.145]) by oss.sgi.com (8.11.2/8.11.3) with SMTP id g0UC3Bd21638 for ; Wed, 30 Jan 2002 04:03:12 -0800 Received: (from ralf@localhost) by dea.linux-mips.net (8.11.1/8.11.1) id g0UB2ph03724; Wed, 30 Jan 2002 12:02:51 +0100 Date: Wed, 30 Jan 2002 12:02:51 +0100 From: Ralf Baechle To: Matthew Dharm Cc: Linux-MIPS Subject: Re: Does Linux invalidate TLB entries? Message-ID: <20020130120250.C3313@dea.linux-mips.net> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: ; from mdharm@momenco.com on Tue, Jan 29, 2002 at 05:03:42PM -0800 X-Accept-Language: de,en,fr Sender: owner-linux-mips@oss.sgi.com Precedence: bulk On Tue, Jan 29, 2002 at 05:03:42PM -0800, Matthew Dharm wrote: > I'm still trying to track down the cause of all my problems, so I'm > going over the RM7000 errata. > > I see one here that I'm not sure if it's a problem or not. It only > applies to OSes which invalidate TLB entries and thus will cause TLB > Invalid exceptions (as opposed to a TLB refill exception, I think). > > So, does Linux invalidate TLBs? I've been looking at the code, and I > think the answer is 'no', but I'm not really sure. Yes, Linux may create TLB entries with V=0. Ralf