Note: This bug is displayed in read-only format because the product is no longer active in Red Hat Bugzilla.
RHEL Engineering is moving the tracking of its product development work on RHEL 6 through RHEL 9 to Red Hat Jira (issues.redhat.com). If you're a Red Hat customer, please continue to file support cases via the Red Hat customer portal. If you're not, please head to the "RHEL project" in Red Hat Jira and file new tickets here. Individual Bugzilla bugs in the statuses "NEW", "ASSIGNED", and "POST" are being migrated throughout September 2023. Bugs of Red Hat partners with an assigned Engineering Partner Manager (EPM) are migrated in late September as per pre-agreed dates. Bugs against components "kernel", "kernel-rt", and "kpatch" are only migrated if still in "NEW" or "ASSIGNED". If you cannot log in to RH Jira, please consult article #7032570. That failing, please send an e-mail to the RH Jira admins at rh-issues@redhat.com to troubleshoot your issue as a user management inquiry. The email creates a ServiceNow ticket with Red Hat. Individual Bugzilla bugs that are migrated will be moved to status "CLOSED", resolution "MIGRATED", and set with "MigratedToJIRA" in "Keywords". The link to the successor Jira issue will be found under "Links", have a little "two-footprint" icon next to it, and direct you to the "RHEL project" in Red Hat Jira (issue links are of type "https://issues.redhat.com/browse/RHEL-XXXX", where "X" is a digit). This same link will be available in a blue banner at the top of the page informing you that that bug has been migrated.

Bug 1690641

Summary: High Host CPU load for Windows 10 Guests (Update 1803) when idle [qemu-kvm]
Product: Red Hat Enterprise Linux 7 Reporter: Paul Gozart <pgozart>
Component: qemu-kvmAssignee: Vitaly Kuznetsov <vkuznets>
Status: CLOSED WONTFIX QA Contact: Yu Wang <wyu>
Severity: medium Docs Contact:
Priority: urgent    
Version: 7.6CC: ailan, bjoernv, chayang, choma, claytonn, dholler, ehabkost, fjin, jinzhao, juzhang, knoel, lijin, linux, lspiehler, michal.skrivanek, michen, mkalinin, mrezanin, mtessun, nerijus, pbonzini, pgozart, ribarry, schandle, siliu, spam, toneata, virt-bugs, virt-maint, vkuznets, vrozenfe, xfu, xiagao, yfu, zhguo
Target Milestone: rcKeywords: FutureFeature, Reopened
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Enhancement
Doc Text:
Story Points: ---
Clone Of: 1638835 Environment:
Last Closed: 2020-06-22 15:08:06 UTC Type: ---
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: 1610461, 1638835, 1644693    
Bug Blocks: 1624786    

Comment 21 Alan Goodman 2019-04-22 12:10:06 UTC 
Also affects Windows 10 1809 on latest Centos 7 with CentOS Plus kernel.

Interestingly I have a machine running updated CentOS but older kernel 3.10.0-514.26.2.el7.x86_64 which does not appear to be impacted.  This machine had a Windows 10 1803 VM installed on it.
Comment 23 Alan Goodman 2019-04-24 20:04:49 UTC 
For me this is fixed in the EV variant of the software.