[NTLUG:Discuss] Error Message on Server Console

[Justin M. Forbes]

On Tue, Feb 15, 2005 at 09:09:06AM -0600, Scott Hollomon wrote:
> I got this error message on my web server console this morning.
> 
> memory.c:203: bad pmd   00000100274aa460   (00000000100000000)
> 
> The machine has an AMD64 processor running CentOS 3.3
> 
> No services appear to have been affected.
> 
> Googling around pmd might mean Physical Media Dependent, Packet Mode Data, or 
> Program Memory Data.  It might also mean Pump Mounted Driver, but since that 
> refers to a diesel engine, I'm guessing that's not it.
> 
> Help, I'm lost.

PMD is  a page middle directory, for systems with 3 lvl page tables.  There
are a few reasons you could get this error, for starters though, what
kernel version are you using? What system board? Athlon64, Opteron? 

Justin