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Bug 893363 - Guest aborted after a 'migrate_cancel'
Summary: Guest aborted after a 'migrate_cancel'
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: qemu-kvm
Version: 7.0
Hardware: Unspecified
OS: Unspecified
high
high
Target Milestone: rc
: ---
Assignee: Hai Huang
QA Contact: Virtualization Bugs
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2013-01-09 08:22 UTC by Qunfang Zhang
Modified: 2014-06-18 03:20 UTC (History)
6 users (show)

Fixed In Version: QEMU 1.4
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2014-06-13 11:05:02 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)
gdb log for the aborted issue after 'migrate_cancel' (44.03 KB, text/plain)
2013-01-09 08:24 UTC, Qunfang Zhang 		no flags Details
View All

Description Qunfang Zhang 2013-01-09 08:22:39 UTC 
Description of problem:
This issue is found accompanied with bug 893350. Please check bug 893350 first. As the migration doesn't finish and only 4k ram are left so I used 'migrate_cancel' to cancel to migration process. But sometimes guest will aborted.  Open this separate issue to track the aborted issue.

Version-Release number of selected component (if applicable):
kernel-3.6.0-0.29.el7.x86_64
qemu-kvm-1.3.0-3.el7.x86_64

How reproducible:
Sometimes. (Hit twice after five time attempts)


Steps to Reproduce:
. Boot a guest on src host, and also boot it with listening mode (-incoming tcp:0:5800" on dst host.

2. Running a memory r/w generator inside guest:

#cat test.c

#include <stdlib.h>
main()
//example to generate dirty pages and delay migration for demo purposes:
{
    unsigned char *array;
    long int i,j,k;
    unsigned char c;
    long int loop=0;
    array=malloc(1024*1024*1024);
    while(1)
    {
        for(i=0;i<1024;i++)
 {
            c=0;
            for(j=0;j<1024;j++)
            {
                c++;
                for(k=0;k<1024;k++)
                {
                    array[i*1024*1024+j*1024+k]=c;
                }
            }
        }
        loop++;
    }
}

#gcc test.c -o test
#./test

3. On dst host:
(qemu) migrate_set_capability xbzrle on 

4. On source host:
(qemu) migrate_set_capability xbzrle on 
(qemu) migrate_cache_size 2G
(qemu) migrate -d tcp:$dst_host_ip:5800

5. When "(qemu)info migrate" shows only 4k ram are left and migration never finished. Cancel migration process.
(qemu) migrate_cancel
  
Actual results:
Guest aborted. (Please check the attachment for detail log.)

Expected results:
Guest works well, migration is cancelled.

Additional info:
Comment 1 Qunfang Zhang 2013-01-09 08:24:01 UTC 
Created attachment 675303 [details]
gdb log for the aborted issue after 'migrate_cancel'
Comment 3 Orit Wasserman 2013-01-10 09:54:08 UTC 
Fixed in qemu 1.4:
http://lists.gnu.org/archive/html/qemu-devel/2012-12/msg02939.html
Comment 8 mazhang 2014-01-21 07:34:18 UTC 
Can not reproduce this bug after 10 times try.

Host:
RHEL-7.0-20130306.0
qemu-kvm-1.3.0-3.el7.x86_64
ipxe-roms-qemu-20130517-2.gitc4bce43.el7.noarch
qemu-img-1.3.0-3.el7.x86_64
qemu-kvm-tools-1.3.0-3.el7.x86_64
qemu-kvm-common-1.3.0-3.el7.x86_64
qemu-kvm-debuginfo-1.3.0-3.el7.x86_64
kernel-3.7.0-0.36.el7.x86_64

Will update to the latest qemu-kvm and kernel then test this bug.
Comment 9 mazhang 2014-01-26 09:08:22 UTC 
(In reply to mazhang from comment #8)
> Can not reproduce this bug after 10 times try.
> 
> Host:
> RHEL-7.0-20130306.0
> qemu-kvm-1.3.0-3.el7.x86_64
> ipxe-roms-qemu-20130517-2.gitc4bce43.el7.noarch
> qemu-img-1.3.0-3.el7.x86_64
> qemu-kvm-tools-1.3.0-3.el7.x86_64
> qemu-kvm-common-1.3.0-3.el7.x86_64
> qemu-kvm-debuginfo-1.3.0-3.el7.x86_64
> kernel-3.7.0-0.36.el7.x86_64
> 
> Will update to the latest qemu-kvm and kernel then test this bug.

Confirm with qzhang my steps, then update qemu-kvm and kernel re-test this bug.

Host:
qemu-kvm-1.5.3-39.el7.x86_64
kernel-3.10.0-78.el7.x86_64

Guest:
kernel-3.10.0-64.el7.x86_64

Steps:
1. Start qemu-kvm :
/usr/libexec/qemu-kvm \
-M pc \
-cpu Nehalem \
-m 2G \
-smp 4,sockets=2,cores=2,threads=1,maxcpus=16 \
-enable-kvm \
-name rhel7-64 \
-uuid 990ea161-6b67-47b2-b803-19fb01d30d12 \
-smbios type=1,manufacturer='Red Hat',product='RHEV Hypervisor',version=el6,serial=koTUXQrb,uuid=feebc8fd-f8b0-4e75-abc3-e63fcdb67170 \
-k en-us \
-rtc base=localtime,clock=host,driftfix=slew \
-nodefaults \
-monitor stdio \
-qmp tcp:0:6666,server,nowait \
-boot menu=on \
-bios /usr/share/seabios/bios.bin \
-chardev socket,id=seabioslog,path=/tmp/seabios,server,nowait \
-device isa-debugcon,chardev=seabioslog,iobase=0x402 \
-monitor unix:/tmp/guest-sock,server,nowait \
-netdev tap,id=hostnet0,vhost=on \
-device virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:39:13:2c \
-device virtio-balloon-pci,id=balloon0 \
-chardev socket,id=qmp_id_qmpmonitor1,path=/tmp/monitor-qmp,server,nowait \
-mon chardev=qmp_id_qmpmonitor1,mode=control  \
-drive file=/home/rhel7-64.raw,if=none,id=drive-virtio-disk0,format=raw,cache=none,werror=stop,rerror=stop,aio=threads \
-device virtio-blk-pci,scsi=off,bus=pci.0,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1 \
-vga qxl \
-spice port=5900,disable-ticketing \

2. Run the application generate dirty pages.

3. Enablem xbzrle, and migrate guest.

Result:
Qemu-kvm works well,migration success, not found core dumped after try more then 10 times.

So this bug has been fixed.
Comment 12 Ludek Smid 2014-06-13 11:05:02 UTC 
This request was resolved in Red Hat Enterprise Linux 7.0.

Contact your manager or support representative in case you have further questions about the request.
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