Bug 1687541

Summary: qemu aborted when start guest with a big iothreads
Product: Red Hat Enterprise Linux 8 Reporter: Stefan Hajnoczi <stefanha>
Component: qemu-kvmAssignee: Stefan Hajnoczi <stefanha>
Status: CLOSED ERRATA QA Contact: Xueqiang Wei <xuwei>
Severity: medium Docs Contact:
Priority: medium    
Version: 8.0CC: aliang, chayang, coli, juzhang, mrezanin, ngu, rbalakri, stefanha, toneata, virt-maint, xuwei, yafu
Target Milestone: rc   
Target Release: 8.0   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: qemu-kvm-2.12.0-84.module+el8.1.0+3980+a02d9447 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: 1607768 Environment:
Last Closed: 2019-11-05 20:48:05 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: 1607768    
Bug Blocks: 1649160    

Comment 1 Ademar Reis 2019-08-13 16:24:40 UTC 
devel_ack+ for RHEL, but removing the z-stream flags. This is a corner case with a easy workaround and there are no customer reports.
Comment 6 Xueqiang Wei 2019-08-19 11:11:14 UTC 
Tested on qemu-kvm-2.12.0-84.module+el8.1.0+3980+a02d9447, not hit this issue. So set bug status to VERIFIED.


Versions:
Host:
kernel-4.18.0-131.el8.x86_64
qemu-kvm-2.12.0-84.module+el8.1.0+3980+a02d9447

Guest:
kernel-4.18.0-131.el8.x86_64



# ulimit -n 102400

start guest with 10000 iothreads, it works well.

# sh bug_1687541.sh 
QEMU 2.12.0 monitor - type 'help' for more information
(qemu) c
(qemu) system_reset      
(qemu) system_powerdown
Comment 8 errata-xmlrpc 2019-11-05 20:48:05 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2019:3345