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Subject2.2.7 LCA machinecheck...
Hi,

I'm running an webserver on an Alpha system (LCA PCI-33 @166MHz)

The machine has two ethernet boards (RTL8139) one is used to
connect to my ISP and the other to connect to a database server.

When I performed some 'heavy' nfs filecopying (read: backup the
html stuff to the database machine) I got the following messages
in the logs:

portmap: RPC call returned error 61
RPC: task of released request still queued!
RPC: (task is on xprt_pending)
lca: machine check (la=0xfffffc00002084d0,pc=0xfffffc000042fa50)
Reason: access to non-existent memory (long frame):
reason: fffffffffffffff8 exc_addr: fffffc000042fa50
dc_stat: 3
car: 403cd251
A read error to memory occurred at address 3000000
Several other uncorrectable errors occurred.
Attempted to access non-existent memory.
+ 0 0000000000000198 0000019800000110
+ 10 0000000100000084 fffffffffffffff8
+ 20 000006f800000000 0000000000000000
+ 30 0000000000000001 0000000000000007
+ 40 0000000000000001 0000000000000500
+ 50 0000000000000008 0000000000000000
+ 60 fffffc00003103e0 fffffc0000310620
+ 70 fffffc0000310520 fffffc0000310460
+ 80 fffffc0000310938 fffffc0000310b78
+ 90 fffffc00003105a0 fffffc0000208000
+ a0 000000011fffe138 fffffc0001277ad8
+ b0 fffffc00004a3b80 0000000000000640
+ c0 0032323a3a3e3e3e 0000000000000003
etc.
this is how /proc/pci looks like:

PCI devices found:
Bus 0, device 6, function 0:
Non-VGA device: NCR 53c810 (rev 1).
Medium devsel. IRQ 11. Master Capable. Latency=32.
I/O at 0x8000 [0x8001].
Non-prefetchable 32 bit memory at 0x4200000 [0x4200000].
Bus 0, device 7, function 0:
Non-VGA device: Intel 82378IB (rev 3).
Medium devsel. Master Capable. No bursts.
Bus 0, device 8, function 0:
Ethernet controller: Realtek 8139 (rev 16).
Medium devsel. Fast back-to-back capable. IRQ 10.
Master Capable. Latency=32. Min Gnt=32.Max Lat=64.
I/O at 0x8800 [0x8801].
Non-prefetchable 32 bit memory at 0x4201000 [0x4201000].
Bus 0, device 11, function 0:
VGA compatible controller: S3 Inc. ViRGE/DX or /GX (rev 1).
Medium devsel. IRQ 13. Master Capable. Latency=32. Min
Gnt=4.Max Lat=255.
Non-prefetchable 32 bit memory at 0x14000000 [0x14000000].
Bus 0, device 12, function 0:
Ethernet controller: Realtek 8139 (rev 16).
Medium devsel. Fast back-to-back capable. IRQ 15.
Master Capable. Latency=32. Min Gnt=32.Max Lat=64.
I/O at 0x9000 [0x9001].
Non-prefetchable 32 bit memory at 0x19000000 [0x19000000].


How should I interpret 'Attempted to access non-existent
memory', normally this would result in a segfault wouldn't it ?
Is this serious hardware trouble or what ?

The system has 48 Mb RAM.

Gert

--
======================================================================
= LINUX = Unix The Next Generation ................................ =
= gertk@rendo.dekooi.nl running Linux on Intel and Alpha =
======================================================================



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