From owner-freebsd-smp Wed Nov 20 12:50:27 1996 Return-Path: owner-smp Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id MAA05166 for smp-outgoing; Wed, 20 Nov 1996 12:50:27 -0800 (PST) Received: from friley216.res.iastate.edu (friley216.res.iastate.edu [129.186.78.216]) by freefall.freebsd.org (8.7.5/8.7.3) with ESMTP id MAA05114 for ; Wed, 20 Nov 1996 12:50:21 -0800 (PST) Received: from friley216.res.iastate.edu (loopback [127.0.0.1]) by friley216.res.iastate.edu (8.7.6/8.7.3) with ESMTP id OAA02373; Wed, 20 Nov 1996 14:50:05 -0600 (CST) Message-Id: <199611202050.OAA02373@friley216.res.iastate.edu> X-Mailer: exmh version 1.6.9 8/22/96 To: Peter Wemm cc: Steve Passe , freebsd-smp@freebsd.org Subject: Re: vm_page_alloc(ZERO): missing pages... In-reply-to: Your message of Thu, 21 Nov 1996 04:40:24 +0800. <199611202040.EAA12623@spinner.DIALix.COM> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Wed, 20 Nov 1996 14:50:04 -0600 From: Chris Csanady Sender: owner-smp@freebsd.org X-Loop: FreeBSD.org Precedence: bulk >Steve Passe wrote: >> Hi, >> >> > I'm not sure exactly what this means, but I get the following messages wit h >> > the current SMP kernel. This is with APIC_IO and APIC_LAZY defined.. >> > >> > vm_page_alloc(ZERO): missing pages on cache queue: 4 >> > vm_page_alloc(ZERO): missing pages on cache queue: 3 >> > vm_page_alloc(ZERO): missing pages on cache queue: 1 >> > vm_page_alloc(NORMAL): missing pages on cache queue: 1 >[..] >> Any vm experts out there who can give a generic description of this error, >> or what might cause it? > >Also, how much paging is taking place? We are not propagating TLB flushes >to all cpu's yet (needs APIC IPI's to work). A great deal of paging. I was running a benchmark (hint) which beats on the memory quite hard. VM as well. Besides being a wonderful benchmark, I also use it every now and then to try to break things. :) Are the lacking TLB flushes very harmful? How hard would this be to implement? Chris > >Cheers, >-Peter > >