Bug 1278282
Summary: | memory unplug triggers BUG_ON: kernel BUG at mm/memory_hotplug.c:703! | ||
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Product: | Red Hat Enterprise Linux 7 | Reporter: | Jan Kurik <jkurik> |
Component: | qemu-kvm-rhev | Assignee: | Igor Mammedov <imammedo> |
Status: | CLOSED ERRATA | QA Contact: | Virtualization Bugs <virt-bugs> |
Severity: | unspecified | Docs Contact: | |
Priority: | unspecified | ||
Version: | 7.2 | CC: | hhuang, huding, imammedo, jkurik, juzhang, knoel, lmiksik, mrezanin, ovasik, sherold, tlavigne, virt-maint, xfu, yuhuang |
Target Milestone: | rc | Keywords: | ZStream |
Target Release: | --- | ||
Hardware: | Unspecified | ||
OS: | Unspecified | ||
Whiteboard: | |||
Fixed In Version: | qemu-kvm-rhev-2.3.0-31.el7_2.1 | Doc Type: | Bug Fix |
Doc Text: | Story Points: | --- | |
Clone Of: | 1275230 | Environment: | |
Last Closed: | 2015-12-07 21:42:33 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: | 1275230 | ||
Bug Blocks: |
Description
Jan Kurik
2015-11-05 07:27:36 UTC
Reproduce: kernel: 3.10.0-326.el7.x86_64 qemu:qemu-kvm-rhev-2.3.0-31.el7 Steps: 1. /usr/libexec/qemu-kvm -name rhel72-sn5 -m 4G,slots=8,maxmem=40G -smp 4,sockets=4,cores=1,threads=1 -no-user-config -nodefaults -rtc base=utc,driftfix=slew -global kvm-pit.lost_tick_policy=discard -boot menu=on,strict=on -object iothread,id=iothread0 -drive file=/home/guest/rhel72-sn5.img,if=none,id=drive-data-disk,format=qcow2,cache=none,aio=native,werror=stop,rerror=stop -device virtio-blk-pci,drive=drive-data-disk,id=data-disk,iothread=iothread0,bus=pci.0,addr=0x7 -netdev tap,id=hostnet1,vhost=on -device e1000,netdev=hostnet1,id=net2,mac=10:1a:4a:42:0a:0b,bus=pci.0,addr=0xa -usb -device usb-tablet,id=input0 -vga qxl -spice port=5901,addr=0.0.0.0,disable-ticketing,image-compression=off,seamless-migration=on -monitor unix:/tmp/monitor3,server,nowait -serial unix:/tmp/console,server,nowait 2. Hotplug memory 5 times via script #!/bin/bash i=0 while [ $i -lt 5 ] do echo $i sleep 3 echo "object_add memory-backend-ram,id=mem$i,size=128M"|nc -U /tmp/monitor3 sleep 2 echo "device_add pc-dimm,id=dimm$i,memdev=mem$i,slot=$i"|nc -U /tmp/monitor3 i=$(($i+1)) done 3. Unplug memory 5 times via script; #!/bin/bash i=0 while [ $i -lt 5 ] do echo $i sleep 3 echo "device_del dimm$i"|nc -U /tmp/monitor3 echo "object_del mem$i"|nc -U /tmp/monitor3 sleep 2 i=$(($i+1)) done Guest crashed.Got same result "kernel BUG at mm/memory_hotplug.c:703!" Verify: kernel: 3.10.0-328.el7.x86_64 qemu: qemu-kvm-rhev-2.3.0-31.el7_2.1 With same steps as above, guest work well, don't crash. So the bug is fixed. Reverify: kernel: 3.10.0-327.2.1.el7.x86_64 qemu-kvm: qemu-kvm-rhev-2.3.0-31.el7_2.1 With same steps as comment 4, guest works well, don't crash. So,the bug is fixed. Reverify: kernel: 3.10.0-331.el7.x86_64 qemu-kvm: qemu-kvm-rhev-2.3.0-31.el7_2.2 QE test on above environment with same steps as comment 4, guest works well, don't crash. So the bug is fixed. Reverify: kernel: 3.10.0-327.3.1.el7.x86_64 qemu-kvm: qemu-kvm-rhev-2.3.0-31.el7_2.3 QE test on above environment with same steps as comment 4, guest works well, don't crash. So the bug is fixed. 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://rhn.redhat.com/errata/RHBA-2015-2555.html |