NetBSD Problem Report #51743
From www@NetBSD.org Mon Dec 26 05:26:47 2016
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for <gnats-bugs@gnats.NetBSD.org>; Mon, 26 Dec 2016 05:26:47 +0000 (UTC)
Message-Id: <20161226052646.0F0F07A340@mollari.NetBSD.org>
Date: Mon, 26 Dec 2016 05:26:46 +0000 (UTC)
From: ozaki-r@netbsd.org
Reply-To: ozaki-r@netbsd.org
To: gnats-bugs@NetBSD.org
Subject: Kernel with DEBUG fails to boot up on KVM since introducing uvm_hotplug(9)
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>Number: 51743
>Category: kern
>Synopsis: Kernel with DEBUG fails to boot up on KVM since introducing uvm_hotplug(9)
>Confidential: no
>Severity: critical
>Priority: high
>Responsible: kern-bug-people
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Mon Dec 26 05:30:00 +0000 2016
>Originator: Ryota Ozaki
>Release: -current
>Organization:
>Environment:
NetBSD kvm 7.99.52 NetBSD 7.99.52 (KVM) #527: Mon Dec 26 13:58:06 JST 2016 ozaki-r@rangeley:(hidden) amd64
qemu-kvm-2.8.0-1.fc25.x86_64
>Description:
A kernel with DEBUG fails to boot up on a KVM since the commit
"Introduce uvm_hotplug(9) to the kernel.".
Before introducing the feature, a kernel boots up with the following message:
>> NetBSD/x86 PXE boot, Revision 5.1 (from NetBSD 6.0)
>> Memory: 625/1046288 k
Press return to boot now, any other key for boot menu
booting netbsd - starting in 0 seconds.
PXE BIOS Version 2.1
Using PCI device at bus 0 device 6 function 0
Ethernet address 52:54:00:bb:18:46
6091699+3349216+984352 [646536+430846]=0xc299b0
kernel text is mapped with 4 large pages and 0 normal pages
ksyms: checking .text
ksyms: checking .rodata
ksyms: checking .eh_frame
...
After introducing the feature, the kernel seems to hang before outputting
"kernel text is mapped ...". boot -x doesn't show nothing. Removing
virtio balloon doesn't help as well.
If disable DEBUG. the kernel boots up successfully.
Note that a kernel with or without DEBUG boots up on a physical machine
(and ESXi as saying by hikaru@) without any problems.
>How-To-Repeat:
Build a kernel with DEBUG, and boot it on a KVM.
>Fix:
n/a
(Contact us)
$NetBSD: query-full-pr,v 1.39 2013/11/01 18:47:49 spz Exp $
$NetBSD: gnats_config.sh,v 1.8 2006/05/07 09:23:38 tsutsui Exp $
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