intermittent crash dump failures

[Yoel Inbar <yoel@xxxxxxxxxxxxxxxxxxx>]

Hello,
I'm using lkcd 3.1.3 on a machine with 640 MB of RAM, and I'm dumping to 
a 512 MB swap partition. Sometimes, crash dumps will fail, and console 
messages like the following will be printed:
attempt to access past end of device
08:02: rw=1, want=13439964, limit=498015
I do have DUMP_LEVEL=4, so I'm afraid I might be running out of room on 
the partition I'm dumping to. However:
1. I also have DUMP_COMPRESS_PAGES=1.
2. Dumps don't fail consistently.
So I think there might be something else going on. Any help would be 
greatly appreciated.
Thanks,

Yoel