Hello Matthias,

Thank you very much for your explanation.

Following your advice, I tried to set a direct access to a network device for the first L4Linux instance.

However, when I run "ifconfig" command in L4Linux shell I don't get any working eth0 configuration, the result is shown below:

- L4Linux on Qemu

/ # ifconfig

lo        Link encap:Local Loopback  

          inet addr:127.0.0.1  Mask:255.0.0.0

          UP LOOPBACK RUNNING  MTU:65536  Metric:1

          RX packets:0 errors:0 dropped:0 overruns:0 frame:0

          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:0 

          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

I tested the "ifconfig" command an a Linux running the same Qemu vexpress-a9 configuration and I get an eth0 configuration as shown below:

- Linux on Qemu:

/ # ifconfig

eth0      Link encap:Ethernet  HWaddr 52:54:00:12:34:56  

          inet addr:192.168.50.1  Bcast:192.168.50.255  Mask:255.255.255.0

          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

          RX packets:0 errors:0 dropped:0 overruns:0 frame:0

          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:1000 

          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

          Interrupt:47 

lo        Link encap:Local Loopback  

          inet addr:127.0.0.1  Mask:255.0.0.0

          UP LOOPBACK RUNNING  MTU:65536  Metric:1

          RX packets:0 errors:0 dropped:0 overruns:0 frame:0

          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:0 

          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

For the logs of L4Linux I can see that the IO server prints a warning saying that "Service registration failed: 'l4lx' ".

Do you have an idea of what might be wrong.

My Lua and IO configuration files are given below after the L4Linux boot logs.

l4linux | L4re_kernel main Hello world ! 

l4linux | ARGC=13

l4linux | ARGV=b1007e04

l4linux | ENVP=b1007e3c

l4linux | AUXP=b1007e40

l4linux |   arg: 'rom/vmlinuz.arm'

l4linux |   arg: 'earlyprintk=1'

l4linux |   arg: 'showpfexc=1'

l4linux |   arg: 'showghost=1'

l4linux |   arg: 'mem=64M'

l4linux |   arg: 'l4shmnet.add=shmns,macpart=1,create'

l4linux |   arg: 'console=ttyLv0'

l4linux |   arg: 'l4x_rd=rom/ramdisk-arm.rd'

l4linux |   arg: 'root=1:0'

l4linux |   arg: 'ramdisk_size=4000'

l4linux |   arg: 'init=/linuxrc'

l4linux |   arg: 'print-fatal-signals=1'

l4linux |   arg: 'ip=dhcp'

l4linux | l4re_kernel: Single_page_alloc_base::_alloc heap p= 0 addr = b0100000

l4linux | Region maping: limits [0-bfffffff]

l4linux |  Area map:

l4linux |   [         0-       fff] -> flags=0

l4linux |  Region map:

l4linux |   [  affff000-  afffffff] -> (offs=0, ds=5000, flags=4)

l4linux |   [  b0000000-  b0019fff] -> (offs=0, ds=5000, flags=4)

l4linux |   [  b0020000-  b0026fff] -> (offs=0, ds=5000, flags=4)

l4linux |   [  b0100000-  b013ffff] -> (offs=0, ds=5000, flags=4)

l4linux |   [  b1000000-  b1007fff] -> (offs=0, ds=5000, flags=4)

l4linux |   [  b3000000-  b3000fff] -> (offs=0, ds=5000, flags=4)

l4linux | l4re_kernel -> Loader::start binary dataspace [phys @addr = 612d6000] size = [3c9498]

l4linux | l4re_kernel: Loader::start start file [C:11000]

CPU[0]: run(thread=4c, cpu=0 (1,0,24)

l4linux | l4re_kernel: Loader::start start thread [C:11000]

CPU[0]: run(thread=49, cpu=0 (1,0,24)

l4linux | l4re_kernel: Loader::loader_thread execute 

l4linux | l4re_kernel: Loader::__start execute 

l4linux | l4re_kernel::Elf_Loader::launch bin: 1

l4linux | l4re_kernel -> Elf_loader::launch binary dataspace [phys @addr = 612d6000] size = [3c9498]

l4linux | l4re_kernel: Loader::alloc_app_stack size = 1000 stack virtual addr afff4000

l4linux | l4re_kernel: Loader::alloc_app_stack stack dataspace phys addr = 60451000 size = 1000

l4linux | Elf::load addr= (nil), interpreter= 0

l4linux | Phdr_load: map from file (attaching ro ELF text segment), prog_attach_ds [paddr = 0xa8000000 (0xa8000000), offs 0, size 3960832 ,all seg cow? 0]

l4linux | l4re_kernel: L4Re_app_model::alloc_ds dataspace phys @addr = [b0201dfc] size = [b00113f8] flags 0 

l4linux | Phdr_load: copy data section: prog_attach_ds [paddr = 0xa83c8000 (0xa83c8000), offs 3964928, size 8192, all seg cow? 0]

l4linux | Phdr_load: created dataspace phys addr = 0xb0201e54, size = b00111cc

l4linux | Elf::load app model...done

l4linux | libio: Warning: Query of 'vbus' failed!

l4linux | PH  0 (t:        1) offs=00008000 vaddr=02000000 vend=02476414

l4linux |                     phys=02000000 ephys=02476414

l4linux |                     f_sz=003b039c memsz=00476414 flgs=rwx

l4linux | L4LINUX: Ma DBG: Virtual Address 02000000 End 02476414 

l4linux |  Physical Address 02000000  End 02476414

IO      | Io service

copy on write for 6124f000 to 608cb000

IO      | Verboseness level: 4

IO      | unused physical memory space:

IO      |   [00000000000000-0000005fffffff]

IO      |   [00000070000000-000000ffffffff]

IO      | Loading: config 'rom/arm-ve-a9.io'

MOE: R[600ebe60]: refs=1

IO      | WARNING: Service registration failed: 'l4lx'

IO      | l4lx: [N12_GLOBAL__N_112Virtual_sbusE]

IO      |   Resources: ==== start ====

IO      |   Resources: ===== end =====

IO      |   L4ICU: [N2Vi6Sw_icuE]

IO      |     Resources: ==== start ====

IO      |     Resources: ===== end =====

IO      |   NIC: [N2Vi9Proxy_devE]

IO      |     Resources: ==== start ====

IO      |     IOMEM   [00000002000000-00000002ffffff 1000000] non-pref (32bit) (align=ffffff flags=2)

IO      |     IRQ     [0000000000000f-0000000000000f 1] none (32bit) (align=0 flags=1)

IO      |     Resources: ===== end =====

IO      | Real Hardware -----------------------------------

IO      | System Bus: hid=

IO      |   Resources: ==== start ====

IO      |   Resources: ===== end =====

IO      |   NIC: hid=smsc9118

IO      |     Clients: ===== start ==== 

IO      |       NIC: [N2Vi9Proxy_devE]

IO      |     Clients: ===== end ====

IO      |     Resources: ==== start ====

IO      |     IOMEM   [00000002000000-00000002ffffff 1000000] non-pref (32bit) (align=ffffff flags=2)

IO      |     IRQ     [0000000000000f-0000000000000f 1] none (32bit) (align=0 flags=1)

IO      |     Resources: ===== end =====

IO      | warning: could not register control interface at cap 'platform_ctl'

IO      | Ready. Waiting for request.

l4linux | PH  1 (t:        4) offs=00360490 vaddr=02358490 vend=023584b4

l4linux |                     phys=02358490 ephys=023584b4

l4linux |                     f_sz=00000024 memsz=00000024 flgs=r-x

l4linux | L4LINUX: Ma DBG: Virtual Address 02358490 End 023584b4 

l4linux |  Physical Address 02358490  End 023584b4

l4linux | PH  2 (t: 1685382481) offs=00000000 vaddr=00000000 vend=00000000

l4linux |                     phys=00000000 ephys=00000000

l4linux |                     f_sz=00000000 memsz=00000000 flgs=rwx

l4linux | L4LINUX: Ma DBG: Virtual Address 00000000 End 00000000 

l4linux |  Physical Address 00000000  End 00000000

l4linux | L4LINUX: Ma DBG: Starting binary at 0x2000360, argc=13 argv=0xafff4f64 *argv=0xb1007ff0 argv0=rom/vmlinuz.arm

l4linux | External resolver is at 0xa800075c

l4linux | ======> L4Linux starting... <========

l4linux | Linux version 3.16.0-l4 (aichouch@aichouch-ThinkCentre-M90) (gcc version 4.8.3 20140320 (prerelease) (Sourcery CodeBench Lite 2014.05-29) ) #35 SMP Tue Oct 20 17:04:31 CEST 2015

l4linux | Binary name: rom/vmlinuz.arm

l4linux |    This is an AEABI build.

l4linux | Linux kernel command line (12 args): earlyprintk=1 showpfexc=1 showghost=1 mem=64M l4shmnet.add=shmns,macpart=1,create console=ttyLv0 l4x_rd=rom/ramdisk-arm.rd root=1:0 ramdisk_size=4000 init=/linuxrc print-fatal-signals=1 ip=dhcm

l4linux | CPU mapping (l:p)[1]: 0:0

l4linux | Image: 020000a0 - 02600000 [6143 KiB].

l4linux | Areas: Text:     020000a0 - 02384000 [3599kB] (a bit longer)

l4linux |        Data:     02384000 - 023abc20 [159kB]

l4linux |        Initdata: 02359000 - 02382900 [166kB]

l4linux |        BSS:      023b039c - 02476414 [792kB]

l4linux | Device scan:

l4linux | Device scan done.

l4linux | L4LINUX: Ma DBG: l4lx_thread_create: Created thread 413 (cpu0) (u:b3000e00, v:b3000c00, sp:02385fa4)

l4linux | main thread will be 413

l4linux | l4x_register_pointer_section: addr = 02000000 size = 4681728

l4linux | section-with-init: Virt: 0x2000000 to 0x2476413 [4569 KiB]

l4linux | section-with-init: Phys: 0x60454000 to 0x608ca413, [4569 KiB]

CPU[0]: run(thread=54, cpu=0 (1,0,0)

l4linux | Main thread running, waiting...

l4linux | Main thread running, waiting...

l4linux | stext virt 020000a0, phys 604540a0 

l4linux | etext virt 02384000, phys 607d8000 

l4linux | L4x: Memory size: 64MB

l4linux | L4x: Setting superpages for main memory

l4linux | L4x: Adjusted memory start: 02000000

l4linux |     Main memory: Virt: 0x2600000 to 0x65fffff [65536 KiB]

l4linux |     Main memory: Phys: 0x61a00000 to 0x659fffff, [65536 KiB]

l4linux | l4x: vmalloc area: 06600000 - 0e600000

l4linux | l4x_register_pointer_section: addr = 02000000 size = 4681728

l4linux |            text: Virt: 0x2000000 to 0x2476413 [4569 KiB]

l4linux |            text: Phys: 0x60454000 to 0x608ca413, [4569 KiB]

l4linux | Booting Linux on physicl CPU 0x0

Linux version 3.16.0-l (aichouch@aichouch-Thin [Centre-M90) (gcc versionm 4.8.3 20140320 (prerelease) (Sourcery CodeBenc Lite 2014.05-29) ) #35 [MP Tue Oct 20 17:04:31 CmEST 2015

CPU: Fiasco [410fc090]revision 0 (ARMv7), cr=0 [000000

CPU: PIPT / VIPT nonalasing data cache, VIPT n [naliasing instruction camche

Machine: L4

Ignoring unrecognised ag 0x00000000

bootconsole [earlykdb0 enabled

Forcing write-allocatecache policy for SMP

Forcing shared mapping for SMP

Memory policy: Data cahe writealloc

Page fault: addr = bffff003 pc = 0235cb80 (rw, T)

l4linux | Forward PF to our pager

l4linux | Loading: rom/ramdisk-arm.rd

l4linux | INITRD: Size of RAMdisk is 3072KiB

l4linux | INITRD: 00002000 - 0030000

l4x_virt_to_phys: Could not translate virt. address 0x2000

l4linux | v2p: 0: v:00000000-00001000 p:00000000-00001000 sz:00001000

l4linux | v2p: 1: v:02000000-02476414 p:60454000-608ca414 sz:00476414

l4linux | v2p: 2: v:02600000-06600000 p:61a00000-65a00000 sz:04000000

l4linux | v2p: 3: v:02000000-02476414 p:60454000-608ca414 sz:00476414

l4linux | ------------[ cut here ------------

WARNING: CPU: 0 PID: 0at /home/aichouch/dev/l4 [e-snapshot-2014092821/srmc/l4linux/arch/l4/kernel/main.c:392 l4x_virt_tophys+0x7c/0xac()

Modules linked in:

CPU: 0 PID: 0 Comm: swpper Not tainted 3.16.0- [4 #35

[<02010164>] (unwind_bcktrace) from [<02006ee4 [] (show_stack+0x10/0x14)m

[<02006ee4>] (show_stak) from [<022811d4>] (du [p_stack+0x84/0x94)

[<022811d4>] (dump_stak) from [<02020c14>] (wa [n_slowpath_common+0x6c/0mx88)

[<02020c14>] (warn_slopath_common) from [<0202 [ccc>] (warn_slowpath_nulml+0x1c/0x24)

[<02020ccc>] (warn_slopath_null) from [<020021 [8>] (l4x_virt_to_phys+0xm7c/0xac)

[<02002168>] (l4x_virtto_phys) from [<0235bf4c [] (l4x_load_initrd+0x208m/0x240)

[<0235bf4c>] (l4x_loadinitrd) from [<0235d860> [ (setup_arch+0x89c/0x8d4m)

[<0235d860>] (setup_arh) from [<023595c8>] (st [rt_kernel+0x8c/0x370)

[<023595c8>] (start_kenel) from [<00000000>] ( [ (null))

---[ end trace 3406ff2bd97382e ]---

l4x_virt_to_phys: Could not translate virt. address 0x302000

l4linux | v2p: 0: v:00000000-00001000 p:00000000-00001000 sz:00001000

l4linux | v2p: 1: v:02000000-02476414 p:60454000-608ca414 sz:00476414

l4linux | v2p: 2: v:02600000-06600000 p:61a00000-65a00000 sz:04000000

l4linux | v2p: 3: v:02000000-02476414 p:60454000-608ca414 sz:00476414

l4linux | ------------[ cut here ------------

WARNING: CPU: 0 PID: 0at /home/aichouch/dev/l4 [e-snapshot-2014092821/srmc/l4linux/arch/l4/kernel/main.c:392 l4x_virt_tophys+0x7c/0xac()

Modules linked in:

CPU: 0 PID: 0 Comm: swpper Tainted: G        W [    3.16.0-l4 #35

[<02010164>] (unwind_bcktrace) from [<02006ee4 [] (show_stack+0x10/0x14)m

[<02006ee4>] (show_stak) from [<022811d4>] (du [p_stack+0x84/0x94)

[<022811d4>] (dump_stak) from [<02020c14>] (wa [n_slowpath_common+0x6c/0mx88)

[<02020c14>] (warn_slopath_common) from [<0202 [ccc>] (warn_slowpath_nulml+0x1c/0x24)

[<02020ccc>] (warn_slopath_null) from [<020021 [8>] (l4x_virt_to_phys+0xm7c/0xac)

[<02002168>] (l4x_virtto_phys) from [<0235bf58 [] (l4x_load_initrd+0x214m/0x240)

[<0235bf58>] (l4x_loadinitrd) from [<0235d860> [ (setup_arch+0x89c/0x8d4m)

[<0235d860>] (setup_arh) from [<023595c8>] (st [rt_kernel+0x8c/0x370)

[<023595c8>] (start_kenel) from [<00000000>] ( [ (null))

---[ end trace 3406ff2bd97382f ]---

RAMdisk from 00002000 (00002000) to 00302000 (00302000) [3072KiB]

l4linux | PERCPU: Embedded 7 page/cpu @06521000 s6400 r81 [2 d14080 u32768

Built 1 zonelists in Zne order, mobility group [ng on.  Total pages: 177m16

Kernel command line: erlyprintk=1 showpfexc=1 [howghost=1 mem=64M l4shmmnet.add=shmns,macpart=1,create console=ttyLv0 lx_rd=rom/ramdisk-arm.rd [oot=1:0 ramdisk_size=400m0 init=/linuxrc print-fatal-signals=1 ip=dhcp

l4shmnet: unknown arguent: create

L4LINUX CEA version PI hash table entries: 512 [(order: -1, 2048 bytes)

Dentry cache hash tabl entries: 16384 (order: [, 65536 bytes)

Inode-cache hash tableentries: 8192 (order: 3, [32768 bytes)

Memory: 64776K/71680K vailable (2681K kernel c [de, 159K rwdata, 744K romdata, 166K init, 792K bss, 6904K reserved)

Virtual kernel memory ayout:

    vector  : 0xbffff00 - 0xc0000000   (   4 k [)

    fixmap  : 0xffc0000 - 0xffe00000   (2048 k [)

    vmalloc : 0x0660000 - 0x0e600000   ( 128 M [)

    lowmem  : 0x0000000 - 0x06600000   ( 102 M [)

    modules : 0x0101000 - 0x02000000   (  15 M [)

      .text : 0x0200000 - 0x023584b4   (3426 k [)

      .init : 0x0235900 - 0x02382900   ( 167 k [)

      .data : 0x0238400 - 0x023abc20   ( 160 k [)

       .bss : 0x023b03c - 0x02476414   ( 793 k [)

Hierarchical RCU impleentation.

l4linux RCU restricting CPUs rom NR_CPUS=4 to nr_cpu_ [ds=1.

RCU: Adjusting geometr for rcu_fanout_leaf=16, [nr_cpu_ids=1

NR_IRQS:220

l4timer: Using IRQ210

KERNEL: Ma DBG: Context constructor

KERNEL: Ma DBG: Thread ARM constructor VA=0xf1175000 Physical Address=0x6fd75000

KERNEL: Ma DBG:  thread_object: sys_control: result 0

L4LINUX: Ma DBG: l4lx_thread_create: Created thread 419 (timer0) (u:b3000a00, v:00000000, sp:0240dfa0)

CPU[0]: run(thread=59, cpu=0 (1,0,0)

KERNEL: Ma DBG: KERNEL-268396848: thread-arm::user_invoke() 

l4linux | sched_clock: 64 bits at1000kHz, resolution 1000 [s, wraps every 214748364m8000ns

Console: colour dummy evice 80x30

console [ttyLv0] enabled

console [ttyLv0] enabld

bootconsole [earlykdb0] disabled

bootconsole [earlykdb0 disabled

Calibrating delay loop... 523.46 BogoMIPS (lpj=2617344)

pid_max: default: 32768 minimum: 301

Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)

Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes)

CPU: Testing write buffer coherency: ok

CPU0: thread -1, cpu 0, socket 0, mpidr 80000000

Setting up static identity map for 0x2286740 - 0x2286740

Brought up 1 CPUs

SMP: Total of 1 processors activated.

CPU: All CPU(s) started in SVC mode.

VFP support v0.3: implementor 41 architecture 3 part 30 variant 9 rev 0

NET: Registered protocol family 16

DMA: preallocated 256 KiB pool for atomic coherent allocations

Switched to clocksource l4kipclk

NET: Registered protocol family 2

TCP established hash table entries: 1024 (order: 0, 4096 bytes)

TCP bind hash table entries: 1024 (order: 1, 8192 bytes)

TCP: Hash tables configured (established 1024 bind 1024)

TCP: reno registered

UDP hash table entries: 256 (order: 1, 8192 bytes)

UDP-Lite hash table entries: 256 (order: 1, 8192 bytes)

NET: Registered protocol family 1

Trying to unpack rootfs image as initramfs...

rootfs image is not initramfs (junk in compressed archive); looks like an initrd

INITRD: Freeing memory.

l4x: Checks passed.

NetWinder Floating Point Emulator V0.97 (double precision)

futex hash table entries: 256 (order: 2, 16384 bytes)

msgmni has been set to 126

io scheduler noop registered

io scheduler deadline registered

io scheduler cfq registered (default)

L4 serial driver

ttyLv0 at MMIO 0x1 (irq = 211, base_baud = 230400) is a L4

l4ser_shm: L4 shared mem serial driver

l4cdds: No name given, not starting.

brd: module loaded

l4bdds: No name given, not starting.

shmns: Requesting, Shmsize 1024 Kbytes

shmns: Failed to establish communication

mousedev: PS/2 mouse device common for all mice

TCP: cubic registered

NET: Registered protocol family 17

RAMDISK: ext2 filesystem found at block 0

RAMDISK: Loading 3072KiB [1 disk] into ram disk... done.

EXT4-fs (ram0): couldn't mount as ext3 due to feature incompatibilities

EXT4-fs (ram0): mounting ext2 file system using the ext4 subsystem

EXT4-fs (ram0): mounted filesystem without journal. Opts: (null)

VFS: Mounted root (ext2 filesystem) readonly on device 1:0.

Freeing unused kernel memory: 164K (02359000 - 02382000)

Please press Enter to activate this console.

- lua configuration file:

-- vim:set ft=lua:

loader       = L4.default_loader;

vbus_l4linux = loader:new_channel();

local lxname = "vmlinuz";

if L4.Info.arch() == "arm" then

  lxname = "vmlinuz.arm";

end

local shmns = L4.default_loader:create_namespace({ shm = "placeholder" });

loader:start(

{

        caps = {

                sigma0 = L4.cast(L4.Proto.Factory, L4.Env.sigma0):create(L4.Proto.Sigma0);

                icu = L4.Env.icu;

                l4linux = vbus_l4linux:svr();

                },

        log = { "IO", "y" },

        l4re_dbg = L4.Dbg.Warn,

},

"rom/io -vvv rom/arm-ve-a9.io");

L4.default_loader:start(

  {

    { ldr_flags = L4.Ldr_flags.pinned_segs, L4.Ldr_flags.eager_map },

    caps = {

      log = L4.Env.log:m("rws"),

    },

    l4re_dbg = L4.Dbg.Warn,

    log = { "l4linux", "yellow" },

    shmns = shmns:mode("rw"),

  },

  "rom/" .. lxname .. " earlyprintk=1 showpfexc=1 showghost=1 mem=64M l4shmnet.add=shmns,macpart=1,create console=ttyLv0 l4x_rd=rom/ramdisk-" ..  L4.Info.arch() .. ".rd root=1:0 ramdisk_size=4000 init=/lin\

uxrc print-fatal-signals=1 ip=dhcp");

- IO server configuration file:

hw-root

{

  NIC => new Device()

  {

    .hid = "smsc9118";

    new-res Mmio(0x02000000 .. 0x02FFFFFF);

    new-res Irq(15);

  }

}

l4lx => new System_bus()

{

  NIC => wrap(hw-root.NIC);

}

One possible solution would be to grant one L4Linux
instance access to the physical device and setup a virtual network
connection between the two instances. Then you can e.g. use iptables to
setup forwarding and NAT to route traffic from the second instance.

Regarding the setting of a virtual network connection and iptables, could you please share a document or some instructions that explain how to setup such a working configuration.

Regarding the use of the "cons multiplexer", if I understood correctly I should use it instead of "l4shmns" service, right?

If yes, do I have to disable the support of "l4shmns" option in L4Linux and remove all configuration from my Lua configuration file?

Could you please share a document or some instructions that explain how to use the "cons multiplexer".

Thank you very much for your help.

Best regards,

Mahdi

On Thu, Oct 22, 2015 at 10:28 AM, Matthias Lange <matthias.lange@kernkonzept.com> wrote:

Hi,

On 10/21/2015 02:34 PM, Mahdi Aichouch wrote:
> Hello,
>
> I was able to run two L4linux instances on top of L4 Fiasco OC using a
> Qemu emulator of a versatile express-a9 board .
>
> I would like to make these two instances share one ethernet network device.

To share a device you need a multiplexer which has access to the
physical device (and drives it) and provide a virtual device for each of
the clients. One possible solution would be to grant one L4Linux
instance access to the physical device and setup a virtual network
connection between the two instances. Then you can e.g. use iptables to
setup forwarding and NAT to route traffic from the second instance.

> I would like also to switch between the two L4Linux shell, because in
> Qemu only one shell is accessible.

For that you can use 'cons' our console multiplexer.

> I followed this guide[1] to connect two L4Linux instances using
> "l4shmnet", and this thread [2]
> to get access to the shell when testing on Qemu.
>
> However, the "l4shmnet" is not working correctly, both L4Linux display
> this message:

Maybe this is a memory issue? You assign 1GB to the machine but only
hand 64M to L4Linux (of which 32M are taken by the ramdisk).

Matthias

> shmns: Requesting, Shmsize 1024 Kbytes
> shmns: Failed to establish communication
>
> Could someone help me building such a working configuration.
>
> Is it possible to share a working Qemu command with the right option for
> the network?
> This is my Qemu command
>
> $> qemu-system-arm -cpu cortex-a9 -M vexpress-a9 -smp 1 -no-reboot -m
> 1024M -kernel bin/arm_armv7a/bootstrap_L4Linux_ARM.elf -nographic -net
> nic,model=lan9118 -net user
>
> Is it also possible to share a working lua configuration file?
>
> This is my lua l4lx.cfg file:
>
> -- vim:set ft=lua:
>
> local lxname = "vmlinuz";
> if L4.Info.arch() == "arm" then
>   lxname = "vmlinuz.arm";
> end
>
> local shmns = L4.default_loader:create_namespace({ shm = "placeholder" });
>
> L4.default_loader:start(
>   {
>     { ldr_flags = L4.Ldr_flags.eager_map },
>     caps = {
>       log = L4.Env.log:m("rws"),
>     },
>     l4re_dbg = L4.Dbg.Warn,
>     log = { "l4linux", "yellow" },
>
>     shmns = shmns:mode("rw"),
>   },
>   "rom/" .. lxname .. " earlyprintk=1 showpfexc=1 showghost=1 mem=64M
> l4shmnet.add=shmns,macpart=1,create console=ttyLv0 l4x_rd=rom/ramdisk-"
> ..  L4.Info.arch() .. ".rd root=1:0 ramdisk_size=32768 init=/li\
> nuxrc print-fatal-signals=1");
>
> L4.default_loader:start(
>   {
>     { ldr_flags = L4.Ldr_flags.eager_map },
>     caps = {
>       log = L4.Env.log:m("rws"),
>     },
>     l4re_dbg = L4.Dbg.Warn,
>     log = { "l4linux2", "green" },
>
>     shmns = shmns:mode("rw"),
>   },
>   "rom/" .. lxname .. " earlyprintk=1 showpfexc=1 showghost=1 mem=64M
> l4shmnet.add=shmns,macpart=2 console=ttyLv0 l4x_rd=rom/ramdisk-" ..
> L4.Info.arch() .. ".rd root=1:0 ramdisk_size=32768 init=/linuxrc p\
> rint-fatal-signals=1");
>
>
> Thank you very much in advance.
> Best regards,
>
> Mahdi
>
>
> [1] http://wiki.tudos.org/L4Linux/shmnet
> [2] http://os.inf.tu-dresden.de/pipermail/l4-hackers/2013/005775.html