Re: [Qemu-devel] virtio block device is not working
With a gdb attached I got the following backtrace:
Program received signal SIGABRT, Aborted.
0x75f5eff0 in raise () from /lib64/libc.so.6
(gdb) bt
#0 0x75f5eff0 in raise () at /lib64/libc.so.6
#1 0x75f6136c in abort () at /lib64/libc.so.6
#2 0x1009e704 in kvm_mem_ioeventfd_del (listener=out>, section=0x72e6da00, match_data=, data=0,
e=0x723d0080)
at /home/danielhb/qemu/accel/kvm/kvm-all.c:813
#3 0x1008845c in address_space_add_del_ioeventfds
(as=0x10c2df10 , fds_new=0x0,
fds_new_nb=, fds_old=0x7fffe4078f20,
fds_old_nb=) at /home/danielhb/qemu/memory.c:832
#4 0x in ()
(gdb)
At first glance it looks like kvm_mem_ioeventfd_del can't cleanup the
EventNotifier
it received by itself. Reverting the patch that introduced it looks like
a good
short term solution.
Daniel
On 01/23/2018 10:47 AM, Daniel Henrique Barboza wrote:
Yeah, the problem looks like in virtio-pci-net. This is the output
when running in a Power 9
host:
sudo ./qemu-system-ppc64 -nographic -vga none -m 4G -M
pseries,accel=kvm -netdev type=user,id=net0 -device
virtio-net-pci,netdev=net0
SLOF
**
QEMU Starting
Build Date = Dec 18 2017 13:08:00
FW Version = git-fa981320a1e0968d
Press "s" to enter Open Firmware.
Populating /vdevice methods
Populating /vdevice/vty@7100
Populating /vdevice/nvram@7101
Populating /vdevice/v-scsi@7102
SCSI: Looking for devices
8200 CD-ROM : "QEMU QEMU CD-ROM 2.5+"
Populating /pci@8002000
00 (D) : 1af4 1000 virtio [ net ]
Aborted
As Ziviani mentioned, reverting 4fe6d78b2e fixes it:
$ git diff
diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
index 071f4f5..f290f48 100644
--- a/accel/kvm/kvm-all.c
+++ b/accel/kvm/kvm-all.c
@@ -812,10 +812,6 @@ static void kvm_mem_ioeventfd_del(MemoryListener
*listener,
if (r < 0) {
abort();
}
-
- if (e->cleanup) {
- e->cleanup(e);
- }
}
$ sudo ./qemu-system-ppc64 -nographic -vga none -m 4G -M
pseries,accel=kvm -netdev type=user,id=net0 -device
virtio-net-pci,netdev=net0
SLOF
**
QEMU Starting
Build Date = Dec 18 2017 13:08:00
FW Version = git-fa981320a1e0968d
Press "s" to enter Open Firmware.
Populating /vdevice methods
Populating /vdevice/vty@7100
Populating /vdevice/nvram@7101
Populating /vdevice/v-scsi@7102
SCSI: Looking for devices
8200 CD-ROM : "QEMU QEMU CD-ROM 2.5+"
Populating /pci@8002000
00 (D) : 1af4 1000 virtio [ net ]
No NVRAM common partition, re-initializing...
Scanning USB
Using default console: /vdevice/vty@7100
Welcome to Open Firmware
Copyright (c) 2004, 2017 IBM Corporation All rights reserved.
This program and the accompanying materials are made available
under the terms of the BSD License available at
http://www.opensource.org/licenses/bsd-license.php
Trying to load: from: disk ...
E3405: No such device
Trying to load: from: /vdevice/v-scsi@7102/disk@8200
... No medium !
E3405: No such device
Trying to load: from: /pci@8002000/ethernet@0 ...
Initializing NIC
Reading MAC address from device: 52:54:00:12:34:56
Requesting information via DHCP: done
Using IPv4 address: 10.0.2.15
Requesting file "" via TFTP from 10.0.2.2
Receiving data: 0 KBytes
E3010 (net) TFTP access violation
E3407: Load failed
Type 'boot' and press return to continue booting the system.
Type 'reset-all' and press return to reboot the system.
Ready!
0 >
On 01/23/2018 10:34 AM, jos...@linux.vnet.ibm.com wrote:
On Tue, Jan 23, 2018 at 01:05:28AM -0200, jos...@linux.vnet.ibm.com
wrote:
Hello people!
I'm not able to boot any guest that sets a virtio block device like:
(branch master)
[PPC64]
qemu-system-ppc64 -cpu POWER8 -nographic -vga none -m 4G -M
pseries,accel=kvm,kvm-type=PR -drive file=disk.qcow2,if=virtio
my bad, actually the command line is:
qemu-system-ppc64 -cpu POWER8 -nographic -vga none -m 4G -M
pseries,accel=kvm -netdev type=user,id=net0 -device
virtio-net-pci,netdev=net0 -drive file=../disk.qcow2,if=virtio
and the problem seem to be in virtio-net-pci, not in the block device
QEMU Starting
Build Date = Dec 18 2017 13:08:00
FW Version = git-fa981320a1e0968d
Press "s" to enter Open Firmware.
Populating /vdevice methods
Populating /vdevice/vty@7100
Populating /vdevice/nvram@7101
Populating /vdevice/v-scsi@7102
SCSI: Looking for devices
8200 CD-ROM : "QEMU QEMU CD-ROM 2.5+"
Populating /pci@8002000
00 (D) : 1af4 1000 virtio [ net ]
Aborted
[x86]
qemu-system-x86_64 -m 4G -enable-kvm -drive file=util.qcow2,if=virtio
Running QEMU with GTK 2.x is deprecated, and will
Re: [Qemu-devel] virtio block device is not working
Yeah, the problem looks like in virtio-pci-net. This is the output when
running in a Power 9
host:
sudo ./qemu-system-ppc64 -nographic -vga none -m 4G -M pseries,accel=kvm
-netdev type=user,id=net0 -device virtio-net-pci,netdev=net0
SLOF **
QEMU Starting
Build Date = Dec 18 2017 13:08:00
FW Version = git-fa981320a1e0968d
Press "s" to enter Open Firmware.
Populating /vdevice methods
Populating /vdevice/vty@7100
Populating /vdevice/nvram@7101
Populating /vdevice/v-scsi@7102
SCSI: Looking for devices
8200 CD-ROM : "QEMU QEMU CD-ROM 2.5+"
Populating /pci@8002000
00 (D) : 1af4 1000 virtio [ net ]
Aborted
As Ziviani mentioned, reverting 4fe6d78b2e fixes it:
$ git diff
diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
index 071f4f5..f290f48 100644
--- a/accel/kvm/kvm-all.c
+++ b/accel/kvm/kvm-all.c
@@ -812,10 +812,6 @@ static void kvm_mem_ioeventfd_del(MemoryListener
*listener,
if (r < 0) {
abort();
}
-
- if (e->cleanup) {
- e->cleanup(e);
- }
}
$ sudo ./qemu-system-ppc64 -nographic -vga none -m 4G -M
pseries,accel=kvm -netdev type=user,id=net0 -device
virtio-net-pci,netdev=net0
SLOF **
QEMU Starting
Build Date = Dec 18 2017 13:08:00
FW Version = git-fa981320a1e0968d
Press "s" to enter Open Firmware.
Populating /vdevice methods
Populating /vdevice/vty@7100
Populating /vdevice/nvram@7101
Populating /vdevice/v-scsi@7102
SCSI: Looking for devices
8200 CD-ROM : "QEMU QEMU CD-ROM 2.5+"
Populating /pci@8002000
00 (D) : 1af4 1000 virtio [ net ]
No NVRAM common partition, re-initializing...
Scanning USB
Using default console: /vdevice/vty@7100
Welcome to Open Firmware
Copyright (c) 2004, 2017 IBM Corporation All rights reserved.
This program and the accompanying materials are made available
under the terms of the BSD License available at
http://www.opensource.org/licenses/bsd-license.php
Trying to load: from: disk ...
E3405: No such device
Trying to load: from: /vdevice/v-scsi@7102/disk@8200
... No medium !
E3405: No such device
Trying to load: from: /pci@8002000/ethernet@0 ...
Initializing NIC
Reading MAC address from device: 52:54:00:12:34:56
Requesting information via DHCP: done
Using IPv4 address: 10.0.2.15
Requesting file "" via TFTP from 10.0.2.2
Receiving data: 0 KBytes
E3010 (net) TFTP access violation
E3407: Load failed
Type 'boot' and press return to continue booting the system.
Type 'reset-all' and press return to reboot the system.
Ready!
0 >
On 01/23/2018 10:34 AM, jos...@linux.vnet.ibm.com wrote:
On Tue, Jan 23, 2018 at 01:05:28AM -0200, jos...@linux.vnet.ibm.com wrote:
Hello people!
I'm not able to boot any guest that sets a virtio block device like:
(branch master)
[PPC64]
qemu-system-ppc64 -cpu POWER8 -nographic -vga none -m 4G -M
pseries,accel=kvm,kvm-type=PR -drive file=disk.qcow2,if=virtio
my bad, actually the command line is:
qemu-system-ppc64 -cpu POWER8 -nographic -vga none -m 4G -M pseries,accel=kvm
-netdev type=user,id=net0 -device virtio-net-pci,netdev=net0 -drive
file=../disk.qcow2,if=virtio
and the problem seem to be in virtio-net-pci, not in the block device
QEMU Starting
Build Date = Dec 18 2017 13:08:00
FW Version = git-fa981320a1e0968d
Press "s" to enter Open Firmware.
Populating /vdevice methods
Populating /vdevice/vty@7100
Populating /vdevice/nvram@7101
Populating /vdevice/v-scsi@7102
SCSI: Looking for devices
8200 CD-ROM : "QEMU QEMU CD-ROM 2.5+"
Populating /pci@8002000
00 (D) : 1af4 1000virtio [ net ]
Aborted
[x86]
qemu-system-x86_64 -m 4G -enable-kvm -drive file=util.qcow2,if=virtio
Running QEMU with GTK 2.x is deprecated, and will be removed
in a future release. Please switch to GTK 3.x instead
[1]5282 abort
[Cause]
The commit 4fe6d78b2e introduces the
...
kvm_mem_ioeventfd_del(...) {
...
r = kvm_set_ioeventfd_mmio(fd, ...
if (r < 0) {
abort();
}
+if (e->cleanup) {
+e->cleanup(e);
+}
}
For some reason, not yet clear to me, cleanup() calls the same
kvm_mem_ioeventfd_del again and again until kvm_set_ioeventfd_mmio
returns < 0 and abort().
I was going to send a patch to revert that 'if ()' but I think it could
cause a regression. What do you guys think?
Thanks,
Jose Ricardo Ziviani
Re: [Qemu-devel] virtio block device is not working
On Tue, Jan 23, 2018 at 01:05:28AM -0200, jos...@linux.vnet.ibm.com wrote:
> Hello people!
>
> I'm not able to boot any guest that sets a virtio block device like:
> (branch master)
>
> [PPC64]
> qemu-system-ppc64 -cpu POWER8 -nographic -vga none -m 4G -M
> pseries,accel=kvm,kvm-type=PR -drive file=disk.qcow2,if=virtio
my bad, actually the command line is:
qemu-system-ppc64 -cpu POWER8 -nographic -vga none -m 4G -M pseries,accel=kvm
-netdev type=user,id=net0 -device virtio-net-pci,netdev=net0 -drive
file=../disk.qcow2,if=virtio
and the problem seem to be in virtio-net-pci, not in the block device
> QEMU Starting
> Build Date = Dec 18 2017 13:08:00
> FW Version = git-fa981320a1e0968d
> Press "s" to enter Open Firmware.
>
> Populating /vdevice methods
> Populating /vdevice/vty@7100
> Populating /vdevice/nvram@7101
> Populating /vdevice/v-scsi@7102
>SCSI: Looking for devices
> 8200 CD-ROM : "QEMU QEMU CD-ROM 2.5+"
> Populating /pci@8002000
> 00 (D) : 1af4 1000virtio [ net ]
> Aborted
>
> [x86]
>
> qemu-system-x86_64 -m 4G -enable-kvm -drive file=util.qcow2,if=virtio
> Running QEMU with GTK 2.x is deprecated, and will be removed
> in a future release. Please switch to GTK 3.x instead
> [1]5282 abort
>
> [Cause]
>
> The commit 4fe6d78b2e introduces the
>
> ...
> kvm_mem_ioeventfd_del(...) {
> ...
> r = kvm_set_ioeventfd_mmio(fd, ...
> if (r < 0) {
> abort();
> }
>
> +if (e->cleanup) {
> +e->cleanup(e);
> +}
> }
>
> For some reason, not yet clear to me, cleanup() calls the same
> kvm_mem_ioeventfd_del again and again until kvm_set_ioeventfd_mmio
> returns < 0 and abort().
>
> I was going to send a patch to revert that 'if ()' but I think it could
> cause a regression. What do you guys think?
>
> Thanks,
>
> Jose Ricardo Ziviani
>
>
[Qemu-devel] virtio block device is not working
Hello people!
I'm not able to boot any guest that sets a virtio block device like:
(branch master)
[PPC64]
qemu-system-ppc64 -cpu POWER8 -nographic -vga none -m 4G -M
pseries,accel=kvm,kvm-type=PR -drive file=disk.qcow2,if=virtio
QEMU Starting
Build Date = Dec 18 2017 13:08:00
FW Version = git-fa981320a1e0968d
Press "s" to enter Open Firmware.
Populating /vdevice methods
Populating /vdevice/vty@7100
Populating /vdevice/nvram@7101
Populating /vdevice/v-scsi@7102
SCSI: Looking for devices
8200 CD-ROM : "QEMU QEMU CD-ROM 2.5+"
Populating /pci@8002000
00 (D) : 1af4 1000virtio [ net ]
Aborted
[x86]
qemu-system-x86_64 -m 4G -enable-kvm -drive file=util.qcow2,if=virtio
Running QEMU with GTK 2.x is deprecated, and will be removed
in a future release. Please switch to GTK 3.x instead
[1]5282 abort
[Cause]
The commit 4fe6d78b2e introduces the
...
kvm_mem_ioeventfd_del(...) {
...
r = kvm_set_ioeventfd_mmio(fd, ...
if (r < 0) {
abort();
}
+if (e->cleanup) {
+e->cleanup(e);
+}
}
For some reason, not yet clear to me, cleanup() calls the same
kvm_mem_ioeventfd_del again and again until kvm_set_ioeventfd_mmio
returns < 0 and abort().
I was going to send a patch to revert that 'if ()' but I think it could
cause a regression. What do you guys think?
Thanks,
Jose Ricardo Ziviani
