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Bug 1285624

Summary: AIO is processing only 1 request, even if >1 requests in virtio
Product: Red Hat Enterprise Linux 7 Reporter: Stefan Hajnoczi <stefanha>
Component: qemu-kvm-rhevAssignee: Stefan Hajnoczi <stefanha>
Status: CLOSED DUPLICATE QA Contact: Virtualization Bugs <virt-bugs>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 7.2CC: atheurer, huding, jherrman, jkurik, juzhang, knoel, mrezanin, mst, psuriset, stefanha, virt-bugs, virt-maint, xfu
Target Milestone: rc   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: qemu-kvm-rhev-2.5.0-1.el7 Doc Type: Bug Fix
Doc Text:
When QEMU was configured with the aio=native parameter, KVM virtual machines were slowed significantly. With this update, asynchronous I/O (AIO) can correctly process more than one request at a time, and using aio=native no longer has a negative impact on guest performance.
 Story Points: ---
Clone Of: 1243548 Environment:
Last Closed: 2016-03-17 07:33:27 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: 1243548    
Bug Blocks:    

Comment 2 Stefan Hajnoczi 2015-11-26 08:37:24 UTC 
Cloned for RHEL 7.2.z.  The RHEL 7.3 fix will come from upstream via rebase.
Comment 3 Stefan Hajnoczi 2016-02-24 09:36:20 UTC 
Setting RHEL 7.2.z flag.  For RHEL 7.3, please see bz#1243548.