Hi, I'm using a Lamobo-R1 with the latest stable U-Boot (2017.11) and Linux (4.14) as a server that runs continuously. It has a SATA disk attached to the SATA connector and it is powered by the microUSB PSU that was sold with the board.
It seems that whenever I try to access the SATA disk with lots of I/O (say, copying over a very large file, encoding a video, etc), I get a "Unable to handle kernel paging request" error. I suppose it could be that the AHCI code is messing with the page table when it's under heavy load (probably not very likely), or that access to the SATA disk requires more power than there is available and causes a current surge that leads DRAM to be under-powered and corrupt the page table. Note that I have tried lowering the DRAM frequency from 432 MHz to 408 MHz (increased instability) and 384 MHz (comparable with 432 MHz), so I definitely believe this is DRAM-related one way or another. I have also read https://linux-sunxi.org/Lamobo_R1#Powering_the_board which indicates that the microUSB power supply is limited to 1.8A and that the design is "often somewhat unreliable". Has anyone experiences similar issues or have some comments to share on this kind of issue? Cheers! -- Paul Kocialkowski, developer of free digital technology and hardware support. Website: https://www.paulk.fr/ Coding blog: https://code.paulk.fr/ Git repositories: https://git.paulk.fr/ https://git.code.paulk.fr/ -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
signature.asc
Description: This is a digitally signed message part
