From: james.harris.1@gmail.com   
      
   On 01/12/2025 22:43, Mike Easter wrote:   
   > James Harris wrote:   
   >> That's good. But do they inform the OS of when there are corrections   
   >> and uncorrectable errors?   
   >   
   > Not that I 'rely' on the tools I use...   
   >   
   > gglAIov:   
   >> The Raspberry Pi Compute Module 5 (CM5) supports on-die ECC (Error   
   >> Correction Code), which silently corrects single-bit errors but does   
   >> not report them to the operating system. This is different from   
   >> traditional ECC, which would also report errors. The Pi5 does not   
   >> support traditional ECC with OS-level error reporting, so while   
   >> errors are corrected, the system won't be alerted to potential   
   >> issues with the RAM   
      
   I take it you mean that that's from an AI engine and they are not   
   reliable. If so, agreed in spades. FWIW the following is where Grok told   
   me that on CM5 ECC was integrated with the OS. It's quite categoric. But   
   is it true?   
      
   --- Start ---   
      
   "Unlike the standard Raspberry Pi 5, the Compute Module 5 exposes the   
   ECC side-band signals and the BCM2712 RAS controller, so the Linux EDAC   
   driver can report and correct errors." - Raspberry Pi Forums Thread   
   (November 2024): James Adams (Head of Compute Module Engineering).   
      
   ...   
      
   Jeff Geerling's Testing (Blog/Video, December 2024): He verified this   
   hands-on by injecting errors and logging corrections with the   
   brcmstb_edac driver on a CM5 prototype.   
      
   ...   
      
   Linux Kernel Documentation: The merged EDAC driver (Linux 6.12+)   
   explicitly supports BCM2712 ECC on CM5 (but not standard Pi 5), with   
   details on how it reads RAS registers for error counts.... (search for   
   "brcmstb_edac" commits).   
      
   --- End ---   
      
   As you can see, it does say clearly that Linux can handle ECC reports on   
   the CM5 but thus far I've not found any sources to back it up.   
      
      
   --   
   James Harris   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)