Red Hat Bugzilla – Full Text Bug Listing
|Summary:||virtio balloon extended memory statistics are not supported|
|Product:||[Fedora] Fedora||Reporter:||Renich Bon Ciric <renich>|
|Component:||qemu||Assignee:||Fedora Virtualization Maintainers <virt-maint>|
|Status:||CLOSED WONTFIX||QA Contact:||Fedora Extras Quality Assurance <extras-qa>|
|Version:||16||CC:||amit.shah, berrange, cfergeau, crobinso, dwmw2, ehabkost, gansalmon, gcosta, itamar, jaswinder, jforbes, jonathan, juzhang, knoel, lihuang, madhu.chinakonda, scottt.tw, tburke, virt-maint|
|Fixed In Version:||Doc Type:||Bug Fix|
|Doc Text:||Story Points:||---|
|Last Closed:||2012-07-10 07:37:07 EDT||Type:||---|
|oVirt Team:||---||RHEL 7.3 requirements from Atomic Host:|
|Bug Depends On:||601690|
Description Renich Bon Ciric 2012-03-13 05:36:28 EDT
+++ This bug was initially created as a clone of Bug #601690 +++ Description of problem: KVM and libvirt in RHEL6 have support for querying extended memory statistics from the guest kernel balloon driver. The RHEL6 kernel, however, is missing this since IIRC it was only added in 2.6.34. This is causing frequent bug reports from beta testers expecting extended statistics to be present in RHEL6 and is also useful information for host admins. The code is well isolated from the rest of the kernel, so it should be feasible to backport this. Version-Release number of selected component (if applicable): kernel-2.6.32-33.el6 libvirt-0.8.1-7.el6.x86_64 qemu-kvm-0.12.1.2-2.50.el6.x86_64 How reproducible: Always Steps to Reproduce: 1. Boot a RHEL6 KVM guest 2. Run 'virsh dommemstat $GUESTNAME' on the host 3. Actual results: No output Expected results: Similar output to # virsh dommemstat f14x86_64 swap_in 0 swap_out 0 major_fault 1421 minor_fault 5607546 unused 26672 available 794344 Additional info: There appear to be at least 3 upstream patches required to provide this support in the kernel virtio balloon driver. http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=9564e138b1f6eb137f7149772438d3f3fb3277dd http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=1f34c71afe5115e77a49c4e67720a66e27053e54 http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=169c246a30808588436794e96a97c61a01af9bed --- Additional comment from email@example.com on 2010-06-08 09:58:37 EDT --- This feature request did not get resolved in time for Feature Freeze for the current Red Hat Enterprise Linux release and has now been denied. It has been proposed for the next Red Hat Enterprise Linux release. If you would still like it considered for the current release as an exception, please make that request with your support representative. --- Additional comment from firstname.lastname@example.org on 2010-06-08 13:53:21 EDT --- This request was evaluated by Red Hat Product Management for inclusion in a Red Hat Enterprise Linux major release. Product Management has requested further review of this request by Red Hat Engineering, for potential inclusion in a Red Hat Enterprise Linux Major release. This request is not yet committed for inclusion. --- Additional comment from email@example.com on 2010-07-01 12:21:39 EDT --- Patch(es) available on kernel-2.6.32-42.el6 --- Additional comment from firstname.lastname@example.org on 2010-08-01 12:18:30 EDT --- verified on kernel-2.6.32-52.el6 1. on guest : [root@dhcp-91-115 ~]# free total used free shared buffers cached Mem: 851084 338288 512796 0 78412 105640 -/+ buffers/cache: 154236 696848 Swap: 6258680 0 6258680 2. on host virsh # dommemstat 17 swap_in 0 swap_out 0 major_fault 781 minor_fault 1815889 unused 512812 available 851084 3. on host virsh # setmem 17 4096000 4. on host virsh # dommemstat 17 swap_in 0 swap_out 0 major_fault 781 minor_fault 1827031 unused 3584788 available 3923084 5. on guest [root@dhcp-91-115 ~]# free total used free shared buffers cached Mem: 3923084 338304 3584780 0 78412 105640 -/+ buffers/cache: 154252 3768832 Swap: 6258680 0 6258680 --- Additional comment from email@example.com on 2010-11-11 11:10:12 EST --- Red Hat Enterprise Linux 6.0 is now available and should resolve the problem described in this bug report. This report is therefore being closed with a resolution of CURRENTRELEASE. You may reopen this bug report if the solution does not work for you.
Comment 1 Renich Bon Ciric 2012-03-13 05:37:57 EDT
Here's my sample output: # virsh Welcome to virsh, the virtualization interactive terminal. Type: 'help' for help with commands 'quit' to quit virsh # dommemstat f17 actual 2097152 This was tested on F16 x86_64 (fully updated)
Comment 2 Josh Boyer 2012-03-13 10:07:14 EDT
As far as I know, the kernel has all of the support necessary for this. The commits highlighted in the original bug have long been in the upstream kernel. I believe this should be reported against qemu, as it seems to have disabled the guest-provided stats. It seems there is some kind of long standing problem with them and they haven't solved it yet.
Comment 3 Amit Shah 2012-03-13 10:36:55 EDT
(In reply to comment #2) > As far as I know, the kernel has all of the support necessary for this. The > commits highlighted in the original bug have long been in the upstream kernel. Right. QEMU upstream still lacks some infrastructure that will allow guests to send such stats asynchronously to qemu. Work is in progress, but it's more likely that this will be available in the timeframe for Fedora 18. F16 may never get this functionality.
Comment 4 Renich Bon Ciric 2012-03-13 18:34:51 EDT
Ok, so; leave this open until then or mark it as WONTFIX ?
Comment 5 Fedora Admin XMLRPC Client 2012-03-15 13:57:24 EDT
This package has changed ownership in the Fedora Package Database. Reassigning to the new owner of this component.