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[Qemu-devel] efi var store migration assert (bdrv_co_do_pwritev: Asserti
From: |
Dr. David Alan Gilbert |
Subject: |
[Qemu-devel] efi var store migration assert (bdrv_co_do_pwritev: Assertion `!(bs->open_flags & 0x0800)' failed.) |
Date: |
Fri, 1 Apr 2016 18:58:20 +0100 |
User-agent: |
Mutt/1.5.24 (2015-08-30) |
In the continuing journeys of trying to migrate a q35 guest with ovmf,
I've just hit this assert:
qemu-system-x86_64: /root/git/qemu/block/io.c:1297: bdrv_co_do_pwritev:
Assertion `!(bs->open_flags & 0x0800)' failed.
This is just ahead of rc0 - 1458317c8ada834cf39287f6d11a8cb8a37360d6 from
yesterday.
It looks like that's the efi var store stuff:
#4 0x00007f8073ec3947 in bdrv_co_do_pwritev (bs=0x7f8074faf580,
offset=<optimized out>, bytes=131072,
qiov=0x7f805d5feb50, flags=(unknown: 0)) at /root/git/qemu/block/io.c:1297
#5 0x00007f8073eb6846 in blk_co_pwritev (blk=<optimized out>,
offset=<optimized out>, bytes=<optimized out>,
qiov=<optimized out>, flags=<optimized out>) at
/root/git/qemu/block/block-backend.c:713
#6 0x00007f8073eb688c in blk_write_entry (opaque=0x7f805d5feb70) at
/root/git/qemu/block/block-backend.c:736
#7 0x00007f8073f2782a in coroutine_trampoline (i0=<optimized out>,
i1=<optimized out>)
at /root/git/qemu/util/coroutine-ucontext.c:78
#8 0x00007f806aff9110 in ?? () from /lib64/libc.so.6
#9 0x00007f805d5fe3c0 in ?? ()
#10 0x0000000000000000 in ?? ()
(gdb) up
#1 0x00007f806afe8ce8 in abort () from /lib64/libc.so.6
(gdb)
#2 0x00007f806afe0566 in __assert_fail_base () from /lib64/libc.so.6
(gdb)
#3 0x00007f806afe0612 in __assert_fail () from /lib64/libc.so.6
(gdb)
#4 0x00007f8073ec3947 in bdrv_co_do_pwritev (bs=0x7f8074faf580,
offset=<optimized out>, bytes=131072,
qiov=0x7f805d5feb50, flags=(unknown: 0)) at /root/git/qemu/block/io.c:1297
1297 bool use_local_qiov = false;
(gdb) p *bs
$1 = {total_sectors = 256, read_only = 0, open_flags = 10242, encrypted = 0,
valid_key = 0, sg = 0,
copy_on_read = 0, probed = false, drv = 0x7f8074474840 <bdrv_raw>, opaque =
0x0, blk = 0x7f8074fa5920,
aio_context = 0x7f8074f61bd0, aio_notifiers = {lh_first = 0x0},
filename = "/var/lib/libvirt/qemu/nvram/f23q35efi_VARS.fd", '\000' <repeats
4040 times>,
backing_file = '\000' <repeats 4095 times>, backing_format = '\000' <repeats
15 times>,
full_open_options = 0x7f8074fb9b60,
exact_filename = "/var/lib/libvirt/qemu/nvram/f23q35efi_VARS.fd", '\000'
<repeats 4040 times>,
backing = 0x0, file = 0x7f8074fa6020, before_write_notifiers = {notifiers =
{lh_first = 0x0}},
serialising_in_flight = 0, throttled_reqs = {{entries = {tqh_first = 0x0,
tqh_last = 0x7f8074fb2608}}, {
entries = {tqh_first = 0x0, tqh_last = 0x7f8074fb2618}}},
io_limits_enabled = false, throttle_state = 0x0,
throttle_timers = {timers = {0x0, 0x0}, clock_type = QEMU_CLOCK_REALTIME,
read_timer_cb = 0x0,
write_timer_cb = 0x0, timer_opaque = 0x0}, pending_reqs = {0, 0},
round_robin = {le_next = 0x0,
le_prev = 0x0}, wr_highest_offset = 0, bl = {max_discard = 0,
discard_alignment = 0, max_write_zeroes = 0,
write_zeroes_alignment = 0, opt_transfer_length = 0, max_transfer_length =
0, min_mem_alignment = 1,
opt_mem_alignment = 4096, max_iov = 1024}, zero_beyond_eof = true,
request_alignment = 512,
node_name = "#block307", '\000' <repeats 22 times>, node_list = {tqe_next =
0x7f8074fc1eb0,
tqe_prev = 0x7f8074fb8a00}, bs_list = {tqe_next = 0x7f8074fb5890, tqe_prev
= 0x7f8074faa9a0}, monitor_list = {
tqe_next = 0x0, tqe_prev = 0x0}, dirty_bitmaps = {lh_first = 0x0}, refcnt =
1, tracked_requests = {
lh_first = 0x0}, op_blockers = {{lh_first = 0x0} <repeats 16 times>}, job =
0x0, inherits_from = 0x0,
children = {lh_first = 0x7f8074fa6020}, parents = {lh_first =
0x7f8074fa5a80}, options = 0x7f8074fa04f0,
explicit_options = 0x7f8074fb2830, detect_zeroes =
BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF, backing_blocker = 0x0,
write_threshold_offset = 0, write_threshold_notifier = {notify = 0x0, node =
{le_next = 0x0, le_prev = 0x0}},
quiesce_counter = 0}
Full command line:
/opt/qemu-head/bin/qemu-system-x86_64 -name f23q35efib -S -machine
pc-q35-2.6,accel=kvm,usb=off,vmport=off -cpu SandyBridge -drive
file=/usr/share/OVMF/OVMF_CODE.fd,if=pflash,format=raw,unit=0,readonly=on
-drive
file=/var/lib/libvirt/qemu/nvram/f23q35efi.fd,if=pflash,format=raw,unit=1 -m
4096 -realtime mlock=off -smp 4,sockets=4,cores=1,threads=1 -uuid
e938e303-0cff-4863-9a0b-cf7bcca2f532 -no-user-config -nodefaults -chardev
socket,id=charmonitor,path=/var/lib/libvirt/qemu/domain-2-f23q35efib/monitor.sock,server,nowait
-mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc,driftfix=slew
-global kvm-pit.lost_tick_policy=discard -no-hpet -no-shutdown -global
ICH9-LPC.disable_s3=1 -global ICH9-LPC.disable_s4=1 -boot strict=on -device
pci-bridge,chassis_nr=1,id=pci.1,bus=pcie.0,addr=0x1e -device
pci-bridge,chassis_nr=2,id=pci.2,bus=pci.1,addr=0x1 -device
ich9-usb-ehci1,id=usb,bus=pcie.0,addr=0x1d.0x7 -device
ich9-usb-uhci1,masterbus=usb.0,firstport=0,bus=pcie.0,multifunction=on,addr=0x1d
-device ich9-usb-uhci2,masterbus=usb.0,firstport=2,bus=pcie.0,addr=0x1d.0x1
-device ich9-usb-uhci3,masterbus=usb.0,firstport=4,bus=pcie.0,addr=0x1d.0x2
-device lsi,id=scsi0,bus=pci.2,addr=0x6 -device
virtio-serial-pci,id=virtio-serial0,bus=pci.2,addr=0x3 -drive
file=/home/vms/f23q35efi.qcow2,format=qcow2,if=none,id=drive-virtio-disk0,cache=none
-device
virtio-blk-pci,scsi=off,bus=pci.2,addr=0x4,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1
-drive if=none,id=drive-scsi0-0-0,readonly=on -device
scsi-cd,bus=scsi0.0,scsi-id=0,drive=drive-scsi0-0-0,id=scsi0-0-0,bootindex=2
-netdev tap,fd=25,id=hostnet0 -device
e1000,netdev=hostnet0,id=net0,mac=52:54:00:1f:62:58,bus=pci.2,addr=0x1 -chardev
pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 -chardev
socket,id=charchannel0,path=/var/lib/libvirt/qemu/channel/target/domain-2-f23q35efib/org.qemu.guest_agent.0,server,nowait
-device
virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=org.qemu.guest_agent.0
-chardev spicevmc,id=charchannel1,name=vdagent -device
virtserialport,bus=virtio-serial0.0,nr=2,chardev=charchannel1,id=channel1,name=com.redhat.spice.0
-device usb-tablet,id=input0 -spice
port=5900,addr=127.0.0.1,disable-ticketing,seamless-migration=on -device
qxl-vga,id=video0,ram_size=67108864,vram_size=67108864,vram64_size_mb=0,vgamem_mb=16,bus=pcie.0,addr=0x1
-device intel-hda,id=sound0,bus=pci.2,addr=0x2 -device
hda-duplex,id=sound0-codec0,bus=sound0.0,cad=0 -chardev
spicevmc,id=charredir0,name=usbredir -device
usb-redir,chardev=charredir0,id=redir0 -chardev
spicevmc,id=charredir1,name=usbredir -device
usb-redir,chardev=charredir1,id=redir1 -device
virtio-balloon-pci,id=balloon0,bus=pci.2,addr=0x5 -msg timestamp=on
--
Dr. David Alan Gilbert / address@hidden / Manchester, UK