Bug 1269909

Summary:	RFE: Implement dump-guest-memory in qemu-system-aarch64
Product:	Red Hat Enterprise Linux 7	Reporter:	Richard W.M. Jones <rjones>
Component:	qemu-kvm-rhev	Assignee:	Andrew Jones <drjones>
Status:	CLOSED DUPLICATE	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	7.3	CC:	chayang, drjones, juzhang, michen, virt-maint
Target Milestone:	rc	Keywords:	FutureFeature
Target Release:	---
Hardware:	aarch64
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Enhancement
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-01-21 14:51:47 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	1173755

Description Richard W.M. Jones 2015-10-08 13:16:18 UTC

Description of problem:

It's not possible to use the 'virsh dump --memory-only' option on
aarch64 at the moment.  It seems to rely on a qemu feature which is
not implemented (even upstream) on aarch64:

$ virsh dump --memory-only guestfs-b1rs92hpq4izkpvi /tmp/guestfs-b1rs92hpq4izkpvi.core
error: Failed to core dump domain guestfs-b1rs92hpq4izkpvi to
/tmp/guestfs-b1rs92hpq4izkpvi.core
error: internal error: unable to execute QEMU command 'dump-guest-memory': this
feature or command is not currently supported

It would be nice to have this on aarch64, since it's the recommended
way to collect a debugging core dump for Linux guest kernels which
have crashed.  (An alternative is to use kdump in the guest, but that
requires prior setup).

Version-Release number of selected component (if applicable):

I tested this in Rawhide:
qemu-2.4.0-2.fc24.aarch64

IIUC, the problem is that the function 'cpu_get_dump_info' is not
implemented for aarch64 (only for x86, ppc and s390x so far).

Comment 1 Andrew Jones 2016-01-21 14:51:47 UTC


*** This bug has been marked as a duplicate of bug 1299867 ***