Hi,

Can you tell me the details about how to use iPXE for boot l4linux.I browse the webpage of iPXE, can only find a useful example of network-booting windows PE.

I conclude the process of booting windows PE in three steps

step 1: move the kernal and module files to a directory on the web server

step 2: create a file named boot.ipxe in the same directory, the content of the file is a little like menu.lst in Grub

  #!ipxe
  
  cpuid --ext 29 && set arch amd64 || set arch x86
  kernel wimboot
  initrd ${arch}/media/bootmgr                     bootmgr
  initrd ${arch}/media/Boot/BCD                    BCD
  initrd ${arch}/media/Boot/Fonts/segmono_boot.ttf segmono_boot.ttf
  initrd ${arch}/media/Boot/Fonts/segoe_slboot.ttf segoe_slboot.ttf
  initrd ${arch}/media/Boot/Fonts/wgl4_boot.ttf    wgl4_boot.ttf
  initrd ${arch}/media/Boot/boot.sdi               boot.sdi
  initrd ${arch}/media/sources/boot.wim            boot.wim
  boot

step 3: in client uses the iPXE command to boot from server. maybe : #> chain http://myserver/ipxe/boot.ipxe

I not sure if i can use the same way to boot l4linux.

>Memory is not continious. And Genode's memory manager has strange behavior with this. May be people from Genode can help with this.

>I've temporary solve this issue via hardcode start loading adress to 0x40200000 in iPXE multiboot loader. And I've modify bootstrap modaddr to 0x80000000.

2013/4/10 Ivan Loskutov <loskutov.ivan@...9...>

2013/4/10 yuqing wang <happymoodmglm@...9...>

I downgrade qemu,fedora can start now.
But fedora can not connect to the internet in qemu,it is strange.The log file is attached.

For connect to the internet you need configure ethernet in l4linux. I didn't do auto configuration in this rootfs. Try do:
ifconfig eth0 up
dhclient eth0& - if you use dhcp server in your network.

My research is based on the network of l4linux running on real machine,I think if i have a try of your experiment about network performance of l4linux ,it would help me a lot.

My PC hardware:
motherboard: Intel Q77

CPU: Intel(R) Core(TM) i7-3770 CPU @ 3.40GHz

Ethernet: intel 82579LM

RAM: 4G
I burn the fedora.iso in a cd,try to run it on my PC,but the l4linux hangs,show these message:

[ 60.001054]INFO:rcu_sched detected stalls on CPUs/tasks: { 1} (detected by 0, t= 6002 jiffies)

[ 60.001657]INFO:Stall ended before state dump start
[ 236.893706]INFO:rcu_sched detected stalls on CPUs/tasks: { 1} (detected by 0, t= 24007 jiffies)

[ 236.894303]INFO:Stall ended before state dump start
[ 413.786348]INFO:rcu_sched detected stalls on CPUs/tasks: { 1} (detected by 0, t= 42012 jiffies)

[ 413.786943]INFO:Stall ended before state dump start
[ 590.678987]INFO:rcu_sched detected stalls on CPUs/tasks: { 1} (detected by 0, t= 60017 jiffies)

[ 590.679596]INFO:Stall ended before state dump start

I am not sure whether it's something wrong during my build process or my hardware don't fit the l4linux.

Could you make your fedora.iso file available on net ,so i can download and have a try .I think this would help me to find where is wrong.

I have issues with boot on real hardware too. I've tried use Grub 1, Grub 2 and iPXE for boot.
My target PC has memory layout different from qemu, this part of log l4 bootstraper from my PC:

Limiting RAM region [ bce73000, bcffffff] { 18d000} to [ bce73000, bcffffff] { 18d000} due to 3024 MB limit
Dropping RAM region [100000000, 23e5fffff] {13e600000} due to 3024 MB limit
RAM: 0000000000000000 - 000000000009ebff: 635kB
RAM: 0000000000100000 - 000000001fffffff: 523264kB

RAM: 0000000020200000 - 000000003fffffff: 522240kB
RAM: 0000000040200000 - 00000000bbd36fff: 2026716kB
RAM: 00000000bcde8000 - 00000000bcde8fff: 4kB

RAM: 00000000bce73000 - 00000000bcffffff: 1588kB

Memory is not continious. And Genode's memory manager has strange behavior with this. May be people from Genode can help with this.

I've temporary solve this issue via hardcode start loading adress to 0x40200000 in iPXE multiboot loader. And I've modify bootstrap modaddr to 0x80000000.
With these changes I can boot PC but have only 2G memory for using. I don't try to understand how to work it yet. I'm going to prepare more information and open issue on Genode's bug tracker.

Maybe you have the same issue for your hardware.

--
Ivan Loskutov

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