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 3gycZwlf 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Is this the first error printed in the kern.log? > > Yes. Uptime was about an hour when it occurred. > > > It could very likely be me, but I don't know how the count would have > > errors so late in the process life cycle - do you have > > CONFIG_DEBUG_VM_MAPLE_TREE enabled? This would check the count against > > the tree on modifications and would narrow down where things could have > > gone wrong. > > Unfortunately, the panicking kernel was compiled without CONFIG_DEBUG_VM_MAPLE_TREE. > After the error I recompiled it with that option enabled. This kernel is running for > about 3 hours without the error reappearing. > I sent v3 after producing an error with stress-ng --vm-sigv, which unmaps the entire process space. That might be at play with what you saw, but I'm still unsure if your issue is fixed by this change. I was unable to reproduce the issue you saw against the mm-unstable and mm-stable branch, but that might just mean it's rare. Thanks, Liam