bin/55604: 9.0_STABLE 20200820 savecore fails

[kardel%netbsd.org@localhost]

>Number:         55604
>Category:       bin
>Synopsis:       savecore fails
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    bin-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Aug 24 16:05:00 +0000 2020
>Originator:     kardel%netbsd.org@localhost
>Release:        NetBSD 9.0_STABLE
>Organization:
	
>Environment:
	
	
System: NetBSD router 9.0_STABLE NetBSD 9.0_STABLE (GENERIC) #0: Thu Aug 20 16:16:33 UTC 2020 mkrepro%mkrepro.NetBSD.org@localhost:/usr/src/sys/arch/amd64/compile/GENERIC amd64
Architecture: x86_64
Machine: amd64
>Description:
	savecore fails to save a kernel dump
		# savecore -v
		dumplo = 6552174080 (12797215 * 512)
		savecore: dump_exists:471: kvm_read newdumpmag: _kvm_kvatop(ffffffff8140030c)
		Exit 1
	savecore fails to clear the core
		# savecore -v -c
		dumplo = 6552174080 (12797215 * 512)
		savecore: /dev/rwd0b: kvm_dump_inval: invalid translation (invalid level 3 PDE)
	Normal swap setup is used
		# swapctl -l
		Device      1K-blocks     Used    Avail Capacity  Priority
		/dev/wd0b     8388608        0  8388608     0%    0

	The installation is upgraded from 8.1 to 9.0_STABLE daily releng builds.

>How-To-Repeat:
	Try to use savecore on a daily releng build for amd64.
>Fix:
	?

>Unformatted: