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kern/51743: Kernel with DEBUG fails to boot up on KVM since introducing uvm_hotplug(9)
>Synopsis: Kernel with DEBUG fails to boot up on KVM since introducing uvm_hotplug(9)
>Arrival-Date: Mon Dec 26 05:30:00 +0000 2016
>Originator: Ryota Ozaki
NetBSD kvm 7.99.52 NetBSD 7.99.52 (KVM) #527: Mon Dec 26 13:58:06 JST 2016 ozaki-r@rangeley:(hidden) amd64
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
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.
Build a kernel with DEBUG, and boot it on a KVM.
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