From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <38F200CF.B4A07187@embeddededge.com> Date: Mon, 10 Apr 2000 12:26:55 -0400 From: Dan Malek MIME-Version: 1.0 To: Marcus Sundberg CC: Pavel Roskin , "Wohlgemuth, Jason" , "'linuxppc-embedded@lists.linuxppc.org'" Subject: Re: Software Emulation Exception... References: <38EE0267.FB881499@embeddededge.com> Content-Type: text/plain; charset=us-ascii Sender: owner-linuxppc-embedded@lists.linuxppc.org List-Id: Marcus Sundberg wrote: > Well, it also happens to be typical to the MM problem solved by > the patches at http://www.zeta.org.au/~linsol/..... That's pretty interesting, since the Software Emulation trap is caused by fetching trash from memory, and the MMU changes are to properly track dirty data pages. I don't buy it. All you did by adding these changes was eliminate (or change) the data TLB miss timing. Have you ever looked at the 8xx bus when it gets a TLB fault? Pretty damn weird. I've seen several external devices not behave properly because of this. > And by Pavel's description it's almost 100% certain that the MM > bug is the problem. Well, almost 100% doesn't cut it for me. If you can't determine the actual cause of the problem and prove it has been corrected, it is still broken. -- Dan ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/