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dump header memory size conflict?

To: lkcd@xxxxxxxxxxx
Subject: dump header memory size conflict?
From: Brian Hall <brianw.hall@xxxxxxxxxx>
Date: Wed, 26 Apr 2000 12:00:57 -0600 (MDT)
Reply-to: Brian Hall <brianw.hall@xxxxxxxxxx>
Sender: owner-lkcd@xxxxxxxxxxx
I am trying to debug Alpha lcrash, and I noticed a possible problem in my
header data. Shouldn't this always be true of the dump_header structure data:

(dh_memory_size == dh_page_size * dh_num_pages)

Using a modified version of a program to dump the header contents, I get:

Dump Header (version 2):
 
Magic number: 0xa8190173618f23ed
PAGE_SIZE = 8192
Dump header size: 728
Dump level: 4
Panic string: User created crash dump
Uname info: Linux dhcp96-180.cxo.dec.com 2.2.13 #10 Tue Feb 8 16:06:15 MST 2000
alpha gldulab
Address of current task: fffffc0004e28000
Physical memory: (all sizes in bytes)
        Start: 0xfffffc0000000000
          End: 0xfffffc0006000000
         Size: 0x5af2000
Number of pages in dump: 12288
Total memory used by pages: 0x6000000
Time of dump: Tue Apr 18 15:08:24 2000            


Note this shows total memory used by pages < memory size ?!? I am wondering if
this could be why lcrash keeps dying because it can't access some of the memory.

This machine is an Alpha AS200 with 96MB RAM.

-- 
http://www.bigfoot.com/~brihall
Linux Consultant

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