"pmap_enter: attempted pmap_enter on 4MB page
Barney Wolff
barney at databus.com
Tue Oct 14 18:57:17 PDT 2003
I've been getting subject panics lately. A sure way to provoke them is
to portupgrade -ap. Sooner or later, panic. With the latest build:
FreeBSD lab.databus.com 5.1-CURRENT FreeBSD 5.1-CURRENT #1: Tue Oct 14 01:41:23 EDT 2003
it seemed to last longer (almost 30 min!) before failing.
HW is Asus A7M266-D with 2xAthlon 2200+, 1GB, Adaptec 39160, 2x10k disks,
em0, fxp0.
I have (with a slightly older build) tried DISABLE_PSE and DISABLE_PG_G
with no visible effect.
I believe this started about 10/4/03, but the first few panics were
"PTE vanished". With builds in the last couple of days, the panic
changed to the "4MB page" one.
I cannot rule out hardware, since this system has also lately been
getting sig11's on buildworld - but mbmon shows no excessive temp
and sensible rpms & volts. Before 10/4, this system was rock solid.
One oddity is that I can't get a UP kernel to boot - possibly because
the bios is set to apic interrupts.
If needed, I can make it happen again and get a traceback, or build
an older kernel. I've been hoping for a magical fix, without success
so far.
Thanks for any advice,
Barney
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