Hello,
I'd like to ask you an advice. Our production systems began experiencing
kernel panics but the linux kernel wasn't changed for last 1.5 years.
Also we didn't change drivers for last 0.5 years. I collected vmcores by
netdump and investigated them. All panics are related to corrupted
memory. We already changed motherboards on a few system experienced the
issue but nothing changed. I think we changed user-space code and these
changes lead to incorrect behavior of a few drivers. Is there any way to
trace request to DMA memory to find "bad" driver? I have two proprietary
drivers (AudioCodes and Dialogic) and I think they cause the issue, but
I need a way to find which one causes and which changes provoke the
driver. Because our system was working stable with the same drivers for
long time.
Thank you,
Kostya.
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