Hi Nathan,
Dropping xen-devel…
That is indeed a packaged upstream QEMU, not
trad. So, that’s why you don’t see
rtc updates.
Paul
From:
Nathan March [mailto:nathan@xxxxxx]
Sent: 15 August 2016 17:17
To: Paul Durrant; win-pv-devel@xxxxxxxxxxxxxxxxxxxx
Cc: xen-devel@xxxxxxxxxxxxx
Subject: RE: [win-pv-devel] rtc timeoffset not being set on TZ changes?
Hi Paul,
Nope, I’m using qemu provided by xen-runtime in the centos packages (https://cbs.centos.org/koji/packageinfo?packageID=88).
root 1462 0.2 0.3 406856 21016 ? SLsl Aug13 9:37 /usr/lib64/xen/bin/qemu-system-i386 -xen-domid
31 -chardev socket,id=libxl-cmd,path=/var/run/xen/qmp-libxl-31,server,nowait -no-shutdown -mon chardev=libxl-cmd,mode=control -chardev socket,id=libxenstat-cmd,path=/var/run/xen/qmp-libxenstat-31,server,nowait -mon chardev=libxenstat-cmd,mode=control -nodefaults
-name nathanwin -vnc 127.0.0.1:0,to=99 -display none -device cirrus-vga,vgamem_mb=8 -boot order=d -smp 2,maxcpus=2 -device rtl8139,id=nic0,netdev=net0,mac=00:16:3d:01:04:eb -netdev type=tap,id=net0,ifname=vif31.0-emu,script=no,downscript=no -device rtl8139,id=nic1,netdev=net1,mac=00:16:3d:01:04:ee
-netdev type=tap,id=net1,ifname=vif31.1-emu,script=no,downscript=no -machine xenfv -m 8184 -drive file=/mnt/gtc_disk_f1/nathanwin/drive_c,if=ide,index=0,media=disk,format=raw,cache=writeback -drive file=/mnt/xen/iso/xen_pv-8.1.iso,if=ide,index=2,readonly=on,media=cdrom,format=raw,cache=writeback,id=ide-51745
~ # rpm -qf /usr/lib64/xen/bin/qemu-system-i386
xen-runtime-4.6.3-1.el6.x86_64
- Nathan
Hi Nathan,
Are you using upstream QEMU? If you are then you’re problem is expected. The code in xen-hvm.c:handle_ioreq() completely ignores RTC updates from
Xen, as can be seen at
http://xenbits.xen.org/gitweb/?p=qemu-upstream-unstable.git;a=blob;f=xen-hvm.c;hb=HEAD#l927 whereas QEMU trad handles them, as can be seen at
http://xenbits.xen.org/gitweb/?p=qemu-xen-unstable.git;a=blob;f=i386-dm/helper2.c;hb=HEAD#l475. The PV drivers do not directly interact with this key so there’s nothing essentially ‘wrong’ in your VM.
Paul
Hi All,
On Win 2012 R2 with the latest 8.1 signed drivers, I'm having issues with clocks being reset back to host time on migration. Xen 4.6.3 with
host kernel 3.18.34, using gwd's centos packages.
Based on
https://wiki.xenproject.org/wiki/HVM_timeoffsets I would expect to see rtc/timeoffset being set when I change a timezone/clock in windows, but that's not the case. No matter what, it always seems
to be null:
7c253d95-b15f-45b5-bf1c-395c1cc7b034 = ""
name = "nathanwin"
uuid = "7c253d95-b15f-45b5-bf1c-395c1cc7b034"
rtc = ""
timeoffset = ""
image = ""
ostype = "hvm"
start_time = "1471022816.81"
If I issue a shutdown from XL windows does a graceful shutdown, so the xenbus drivers do seem to be running fine.
Can anyone comment on what might be up here, or if this is just a bug?
Cheers,
Nathan
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