Date: Mon, 3 Dec 2001 14:13:41 -0500 (EST) From: Andrew Gallatin <gallatin@cs.duke.edu> To: "Koster, K.J." <K.J.Koster@kpn.com> Cc: "'freebsd-alpha@freebsd.org'" <freebsd-alpha@FreeBSD.ORG> Subject: RE: as2100 saga continues: memory trouble? *sigh* Message-ID: <15371.52965.269328.817708@grasshopper.cs.duke.edu> In-Reply-To: <59063B5B4D98D311BC0D0001FA7E452205FDA180@l04.research.kpn.com> References: <59063B5B4D98D311BC0D0001FA7E452205FDA180@l04.research.kpn.com>
next in thread | previous in thread | raw e-mail | index | archive | help
Koster, K.J. writes:
> Dear Wilko,
>
> >
> > > When I type "show memory" on the monitor prompt I see that
> > > I have one memory
> > > board with 128MB (which is good) but it also says "bad
> > > pages 4096" (which I
> > > suspect is bad). I cannot remove the one board, for obvious
> > > reasons.
> >
> > You are in deep sh* ...
> >
> Yeah, I was just in denial. Thanks for slapping me out of it.
I see boards on Ebay now & then..
>
> Suppose that I know the bad memory range, any way of telling FreeBSD not to
> use it? Perhaps abuse the option ROM device to claim that memory range for
> itself?
Perhaps we should be using the pg_test field for memory clusters on
some platforms. I'd be interested in seeing what it said for a
machine w/bad ram. If you can build a kernel, can you #define
DEBUG_CLUSTER and print out the memc->mddt_pg_test field in the MEMC
printf(). Sample, mailer mangled patch below.
Drew
Index: machdep.c
===================================================================
RCS file: /home/ncvs/src/sys/alpha/alpha/machdep.c,v
retrieving revision 1.68.2.14
diff -u -c -r1.68.2.14 machdep.c
*** machdep.c 2001/10/04 13:09:36 1.68.2.14
--- machdep.c 2001/12/03 19:07:04
***************
*** 836,843 ****
for (i = 0; i < mddtp->mddt_cluster_cnt; i++) {
memc = &mddtp->mddt_clusters[i];
#ifdef DEBUG_CLUSTER
! printf("MEMC %d: pfn 0x%lx cnt 0x%lx usage 0x%lx\n", i,
! memc->mddt_pfn, memc->mddt_pg_cnt, memc->mddt_usage);
#endif
totalphysmem += memc->mddt_pg_cnt;
--- 836,844 ----
for (i = 0; i < mddtp->mddt_cluster_cnt; i++) {
memc = &mddtp->mddt_clusters[i];
#ifdef DEBUG_CLUSTER
! printf("MEMC %d: pfn 0x%lx cnt 0x%lx tested 0x$lx usage 0x%lx\n", i,
! memc->mddt_pfn, memc->mddt_pg_cnt, memc->mddt_pg_test,
! memc->mddt_usage);
#endif
totalphysmem += memc->mddt_pg_cnt;
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-alpha" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?15371.52965.269328.817708>