I've now a success with our board. It takes hours to compile with our kernel configuration file, on a NFS mounted partition, a PPC823 board with 64MB of memory.
Patrick LERDA > -----Message d'origine----- > De: Wolfgang Denk [SMTP:wd at denx.de] > Date: jeudi 22 juin 2000 19:25 > ?: Lucinda Schafer > Cc: Patrick Lerda; 'Dan Malek'; Nguyen Xuan Hoang; > linuxppc-embedded at lists.linuxppc.org > Objet: Re: MMU problems? > > > In message > <A109131318C4D1119AC20060088DECE330F4B1 at amwmail.adaptivemicro.com> you > wrote: > > > > I agree. I believe we ARE dealing with a kernel bug, and it is > particular to > > the MPC823. > > What makes you think so? Have you run the same hardware with other > CPUs without problems? Have you seen other "good" hardware (TQ > Components, Embedded Planet) having with similar problems, and only > when running with 823 CPUs? > > > Let's hear some success stories--embedded units in production, running > in > > the field for days, shutting down power and rebooting with no kernel > panics. > > That may help convince me we are dealing with a hardware issue. > > OK, then here is a success story. > > I have several systems in test here, a mix of 823, 850, 860, -DE, -T, > -SR, and some development systems are in permanent use by my > customers, and I can't say I see any differences between the CPU's. > > Booting or shutting down was _never_ a problem. We had the usual > crashes whith early versions of 2.2.13 when running low on memory, > but that's fixed. > > With recent kernels (for instance, the 2.2.13 version from MV) I > haven't problems for a _very_ long time (except for the 2.4.0 test > kernels - but I don't use these in production yet). > > > Did you check if environmental parameters make any difference? How > stable is your power supply - are the voltages for your board clean > and within limits? > > Did you measure CPU temperatures, or did you try cooling the CPU's? I > remember early versions of some TQ modules (MPC821 + Adaptec SCSI > controller on a credit card sized modules) which got too hot and > stopped working. > > > And yes, I just compiled (once more) a Linux kernel on one of my > boxes (that's why I reply so late - it takes more than 140 minutes > with a NFS based root filsystem and 16 MB of RAM). You are right, it > makes kind of a good regression test - it streeses all of CPU, I/O > and (with NFS root) networking. > > You asked for success stories: It works for me. > > Wolfgang Denk > > -- > Software Engineering: Embedded and Realtime Systems, Embedded Linux > Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd at denx.de > "Virtual" means never knowing where your next byte is coming from. > ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
