Re: kern/52252: uvm_km_check_empty panic when loading any module

[Paul Goyette <paul%whooppee.com@localhost>]

The following reply was made to PR kern/52252; it has been noted by GNATS.

From: Paul Goyette <paul%whooppee.com@localhost>
To: Anthony Mallet <tho%netbsd.org@localhost>
Cc: gnats-bugs%NetBSD.org@localhost
Subject: Re: kern/52252: uvm_km_check_empty panic when loading any module
Date: Wed, 24 May 2017 07:12:21 +0800 (+08)

 > On Tuesday 23 May 2017, at 07:00, Paul Goyette wrote:
 >>  It is extremely odd that no-one else is seeing this.
 >
 > I definitely agree! Still, I could not find what I was doing wrong...
 > Your questions make sense, especially for the GENERIC kernel that I
 > forgot to try out. See below:
 >
 >>  1. Are you certain that you've built from unmodified sources?
 >
 > Yes, 100% sure. Two different machines with their own checkout.
 > `cvs -q update -PAd` outputs nothing right after an update.
 >
 > Is there another way to check the sources? (apart from doing a fresh
 > checkout).
 
 That should be sufficient.
 
 >>  2. Can you provide the kernel config file that you're using
 >>     (PAPYRUS)?
 >
 > Sure, pasted below. (I'm not sure whether mime attachment are OK with
 > gnats, so it's just pasted).
 >
 >>  3. Can you reproduce this problem using a GENERIC kernel on the real
 >>      machine?
 >
 > It seems to be OK with GENERIC. At least I can load modules with no
 > issue on one of the machine (did not try the other one yet). So that's
 > a strong hint.
 >
 > I had already compared my config with GENERIC without noticing
 > anything suspect, but maybe you'll spot something.
 
 I took a look, and didn't see anything suspicious.
 
 >>  4. Can you reproduce this problem in a QEMU VM?
 >
 > I did not try that. If this is required I can try to set all this
 > up, but maybe I just have something obvious in my config that would
 > explain the issue.
 
 Well, if it works with GENERIC on bare-metal, it's likely to still work 
 with GENERIC under QEMU.  I don't see any obvious issues with your 
 config file, but there must be something in there.
 
 
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