From mboxrd@z Thu Jan 1 00:00:00 1970 From: erik quanstrom Date: Sat, 20 Feb 2010 17:17:21 -0500 To: 9fans@9fans.net Message-ID: <8f6ef34730ac116e3d6a1d45ac557816@ladd.quanstro.net> In-Reply-To: <21666.1266616762@lunacy.ugrad.cs.cmu.edu> References: <21666.1266616762@lunacy.ugrad.cs.cmu.edu> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Subject: Re: [9fans] pineview atom Topicbox-Message-UUID: d7b095cc-ead5-11e9-9d60-3106f5b1d025 > "Back in the old days", a lot of VAX-11/750's running BSD Unix > crashed because of parity errors in their TLB's. 750's running > VMS "didn't have this problem", because VMS would silently work > around it; BSD grew that code--see, for example, <229@astrovax.UUCP>. > Then bits could flip all the time with nobody noticing! nobody noticed, or the os reloaded the tlb? a tlb is usually just a cache, and if it's parity protected obviously one could just reload it on error. - erik