other: 0.090
device: 0.089
PID: 0.081
semantic: 0.081
socket: 0.080
vnc: 0.078
network: 0.077
permissions: 0.075
graphic: 0.072
boot: 0.070
performance: 0.065
debug: 0.062
KVM: 0.041
files: 0.040
network: 0.344
KVM: 0.305
boot: 0.219
debug: 0.028
device: 0.015
files: 0.015
socket: 0.014
vnc: 0.013
other: 0.013
PID: 0.011
semantic: 0.010
performance: 0.005
graphic: 0.004
permissions: 0.004

PXE boot not working

/root/qemu-test/qemu-kvm/x86_64-softmmu/qemu-system-x86_64 -net tap,vlan=0,name=tap.0 -boot n -net nic,macaddr=$MAC,vlan=0,model=e1000,name=e1000.0 -chardev socket,id=monitor,host=0.0.0.0,port=$MONITORPORT,telnet,server,nowait -monitor chardev:monitor



net0: 02:5a:3b:27:00:a1 on PCI00:03.0 (open)                                                                                               
 [Link:up, TX:0 TXE:0 RX:0 RXE:0]                                                                                                         
 DHCP (net0 02:5a:3b:27:00:a1)................ Connection timed out (0x4c106035)                                                            
 No more network devices                                                                                                                    
                                                                                                                                                                                                     
No bootable device. 



After doing a system_reset ....

net0: 02:5a:3b:27:00:a1 on PCI00:03.0 (open)                                                                                               
 [Link:up, TX:0 TXE:0 RX:0 RXE:0]                                                                                                         
DHCP (net0 02:5a:3b:27:00:a1).... ok                                                                                                       
net0: 10.201.1.161/255.0.0.0 gw 10.0.0.1                                                                                                   
Booting from filename "boot.pxe"                                                                                                          
tftp://x.x.x./boot.pxe.. ok      


And it magaically works.

using HEAD.

I can't reproduce this.  I'm using:

commit d9b73e47a3d596c5b33802597ec5bd91ef3348e2
Author: Corentin Chary <email address hidden>
Date:   Tue Jun 1 23:05:44 2010 +0200

    vnc: add missing target for vnc-encodings-*.o

I'm using the command:

sudo x86_64-softmmu/qemu-system-x86_64 -net tap,vlan=0,name=tap.0 -boot n -net nic,vlan=0,model=e1000,name=e1000.0 -chardev socket,id=monitor,host=0.0.0.0,port=1024,telnet,server,nowait -monitor chardev:monitor

The DHCP server I'm using is dnsmasq and it pxe boots as expected.  I've also confirmed that pxe boot is still functional after a system_reset.

Please include information about the exact version of qemu that you are using and the DHCP server that is configured on your network.  Please also try to reproduce with the latest git.

using latest git

dhcp-3.0.1-58.EL4

with configuration: 

 host     xxxx  { filename "boot.pxe"; hardware ethernet 02:5A:3B:27:00:A1; fixed-address 10.201.1.161; }

#
## server config
#
server-identifier   a.b.c.d;
server-name         "some-name";
default-lease-time  600;
max-lease-time      1200;
ddns-update-style   ad-hoc;
#log-facility        local6;

allow booting;
allow bootp;



Latest GIT -> git clone http://git.kernel.org/pub/scm/virt/kvm/qemu-kvm.git

configured with options


./configure --target-list=x86_64-softmmu --enable-gprof --enable-debug  --enable-linux-aio  --enable-profiler --with-kvm-trace 

Install prefix    /usr/local
BIOS directory    /usr/local/share/qemu
binary directory  /usr/local/bin
Manual directory  /usr/local/share/man
ELF interp prefix /usr/gnemul/qemu-%M
Source path       /root/qemu-test/qemu-kvm
C compiler        gcc
Host C compiler   gcc
CFLAGS            -g
QEMU_CFLAGS       -Werror -m64 -fstack-protector-all -Wold-style-definition -Wold-style-declaration -I. -I$(SRC_PATH) -D_FORTIFY_SOURCE=2 -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -W
strict-prototypes -Wredundant-decls -Wall -Wundef -Wendif-labels -Wwrite-strings -Wmissing-prototypes -fno-strict-aliasing
LDFLAGS           -Wl,--warn-common -m64 -g
make              make
install           install
host CPU          x86_64
host big endian   no
target list       x86_64-softmmu
tcg debug enabled yes
Mon debug enabled yes
gprof enabled     yes
sparse enabled    no
strip binaries    no
profiler          yes
static build      no
-Werror enabled   yes
SDL support       yes
curses support    yes
curl support      yes
check support     no
mingw32 support   no
Audio drivers     oss
Extra audio cards ac97 es1370 sb16
Block whitelist
Mixer emulation   no
VNC TLS support   yes
VNC SASL support  yes
xen support       no
CPU emulation     yes
brlapi support    no
bluez  support    no
Documentation     yes
NPTL support      yes
GUEST_BASE        yes
PIE user targets  no
vde support       no
IO thread         no
Linux AIO support yes
Install blobs     yes
KVM support       yes
KVM PIT support   yes
KVM device assig. yes
KVM trace support yes
fdt support       no
preadv support    yes
fdatasync         yes
uuid support      yes
vhost-net support yes



The same to me, but rarely it does start only from third attempt

There seems to be an issue with kvm virtual network interface being connected to a in-kernel bridge implementation.

When you configure networking that way the bridge port comes up when the kvm instance is started.

As the time from the kvm start to entering the netboot rom is minimal and the timeout before the bridge starts forwarding on new ports is long this may cause the machine never getting an address.

If you are using a bridge try setting the forwarding delay to a small value like:

iface vmbridge inet static
 bridge_ports <probably should put some network interface name here - undocumented>
 address 10.10.10.1
 netmask 255.255.255.0
 post-up brctl setfd vmbridge 3


[Expired for QEMU because there has been no activity for 60 days.]