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[Bug 1276298] [NEW] iscsi booted system hangs on 3.8.0.19 ramdisk .(ppc - e500mc)

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Public bug reported:


I was experimenting with an iscsi boot device   as root device , and 
one of the preliminary steps is getting a network connection established via
the default initrd.

 It appears that starting the network from init hangs the
system.

I installed Ubuntu directly to an iSCSI target via the Ubuntu install , copied
the default vmlinux+initrd to a USB, then attempted to setup the boot
environment via USB where we launch vmlinux and initrd via kexec:

svy-boot# mount /dev/sda1 /mnt
svy-boot# cd /mnt/iscsi
svy-boot# ls
abi-3.8.0-19-powerpc-e500mc         
bootargs                            initrd.img-3.8.0-19-powerpc-e500mc
bootiscsi.sh                        kernel
config-3.8.0-19-powerpc-e500mc      vmlinux-3.8.0-19-powerpc-e500mc
go.sh                            
                           
svy-boot# ./go.sh


/sbin/kexec --command='root=/dev/ram ro
UUID=3967a9b2-91f5-4dce-98ae-874fcb2d5a7d ro break debug console=tty0
console=ttyS0,115200 interface=eth3
192.168.1.110:192.168.1.140:192.168.1.1:255.255.0.0:jade-iscsi0:eth3:none
ISCSI_INITIATOR=iqn.1993-08.org.debian:01:53694d75a62e
ISCSI_TARGET_NAME=iqn.2001-04.com.jade:storage.disk0
ISCSI_TARGET_IP=192.168.1.140 ISCSI_TARGET_PORT=3260 ISCSI_TARGET_GROUP=1 '
--initrd=/mnt/iscsi/initrd.img-3.8.0-19-powerpc-e500mc -l
/mnt/iscsi/vmlinux-3.8.0-19-powerpc-e500mc 


I started the system so it would break if a error occured:


[    0.000000] Using P4080 DS machine description
[    0.000000] Memory CAM mapping: 256/256/256 Mb, residual: 3328Mb
[    0.000000] Initializing cgroup subsys cpuset
[    0.000000] Initializing cgroup subsys cpu
[    0.000000] Linux version 3.8.0-19-powerpc-e500mc (buildd@ross) (gcc version
4.7.3 (Ubuntu/Linaro 4.7.3-1ubuntu1) ) #25-Ubuntu SMP Mon Dec 23 12:18:15 UTC
2013 (Ubuntu 3.8.0-19.25-powerpc-e500mc 3.8.13.13)


The system would likely find the iSCSI device but it hangs when the iscsi stack
is started :

(initramfs) sh +x ./iscissi
[ 1750.717666] IPv6: ADDRCONF(NETDEV_UP): eth3: link is not ready
[ 1750.730184] Loading iSCSI transport class v2.0-870.
[ 1750.739849] iscsi: registered transport (tcp)
iscsistart: Logging into iqn.2001-04.com.jade:storage.disk0
192.168.1.140:3260,1
iscsistart: version 2.0-873
[ 1753.621329] tg3 0000:01:00.0 eth3: Link is up at 1000 Mbps, full duplex


- The iSCSI target target was created ona CentOS server ,


#startiscsi.sh 
#
# tgtadm --lld iscsi --op new --mode account --user ronnie --password password
# tgtadm --lld iscsi --op bind --mode account --tid 1 --user ronnie
#
# dd if=/dev/zero of=iscsi.disk0 bs=1024M count=10


tgtadm --lld iscsi --op delete  --mode target --tid 1

tgtadm --lld iscsi --op new --mode target --tid 1 -T iqn.2001-04.com.jade:storage.disk0
tgtadm  --lld iscsi --op new --mode logicalunit --tid 1 --lun 1 -b  `pwd`/iscsi.disk0


tgtadm --lld iscsi --op bind --mode target --tid 1 -I ALL
tgtadm --lld iscsi --op show --mode target

** Affects: linux-ppc (Ubuntu)
     Importance: Undecided
         Status: New

-- 
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Packages, which is subscribed to linux-ppc in Ubuntu.
https://bugs.launchpad.net/bugs/1276298

Title:
  iscsi booted system hangs on 3.8.0.19 ramdisk .(ppc - e500mc)

Status in “linux-ppc” package in Ubuntu:
  New

Bug description:

  I was experimenting with an iscsi boot device   as root device , and 
  one of the preliminary steps is getting a network connection established via
  the default initrd.

   It appears that starting the network from init hangs the
  system.

  I installed Ubuntu directly to an iSCSI target via the Ubuntu install , copied
  the default vmlinux+initrd to a USB, then attempted to setup the boot
  environment via USB where we launch vmlinux and initrd via kexec:

  svy-boot# mount /dev/sda1 /mnt
  svy-boot# cd /mnt/iscsi
  svy-boot# ls
  abi-3.8.0-19-powerpc-e500mc         
  bootargs                            initrd.img-3.8.0-19-powerpc-e500mc
  bootiscsi.sh                        kernel
  config-3.8.0-19-powerpc-e500mc      vmlinux-3.8.0-19-powerpc-e500mc
  go.sh                            
                             
  svy-boot# ./go.sh

  
  /sbin/kexec --command='root=/dev/ram ro
  UUID=3967a9b2-91f5-4dce-98ae-874fcb2d5a7d ro break debug console=tty0
  console=ttyS0,115200 interface=eth3
  192.168.1.110:192.168.1.140:192.168.1.1:255.255.0.0:jade-iscsi0:eth3:none
  ISCSI_INITIATOR=iqn.1993-08.org.debian:01:53694d75a62e
  ISCSI_TARGET_NAME=iqn.2001-04.com.jade:storage.disk0
  ISCSI_TARGET_IP=192.168.1.140 ISCSI_TARGET_PORT=3260 ISCSI_TARGET_GROUP=1 '
  --initrd=/mnt/iscsi/initrd.img-3.8.0-19-powerpc-e500mc -l
  /mnt/iscsi/vmlinux-3.8.0-19-powerpc-e500mc 


  
  I started the system so it would break if a error occured:

  
  [    0.000000] Using P4080 DS machine description
  [    0.000000] Memory CAM mapping: 256/256/256 Mb, residual: 3328Mb
  [    0.000000] Initializing cgroup subsys cpuset
  [    0.000000] Initializing cgroup subsys cpu
  [    0.000000] Linux version 3.8.0-19-powerpc-e500mc (buildd@ross) (gcc version
  4.7.3 (Ubuntu/Linaro 4.7.3-1ubuntu1) ) #25-Ubuntu SMP Mon Dec 23 12:18:15 UTC
  2013 (Ubuntu 3.8.0-19.25-powerpc-e500mc 3.8.13.13)

  
  The system would likely find the iSCSI device but it hangs when the iscsi stack
  is started :

  (initramfs) sh +x ./iscissi
  [ 1750.717666] IPv6: ADDRCONF(NETDEV_UP): eth3: link is not ready
  [ 1750.730184] Loading iSCSI transport class v2.0-870.
  [ 1750.739849] iscsi: registered transport (tcp)
  iscsistart: Logging into iqn.2001-04.com.jade:storage.disk0
  192.168.1.140:3260,1
  iscsistart: version 2.0-873
  [ 1753.621329] tg3 0000:01:00.0 eth3: Link is up at 1000 Mbps, full duplex


  
  - The iSCSI target target was created ona CentOS server ,  

  
  #startiscsi.sh 
  #
  # tgtadm --lld iscsi --op new --mode account --user ronnie --password password
  # tgtadm --lld iscsi --op bind --mode account --tid 1 --user ronnie
  #
  # dd if=/dev/zero of=iscsi.disk0 bs=1024M count=10


  
  tgtadm --lld iscsi --op delete  --mode target --tid 1

  tgtadm --lld iscsi --op new --mode target --tid 1 -T iqn.2001-04.com.jade:storage.disk0
  tgtadm  --lld iscsi --op new --mode logicalunit --tid 1 --lun 1 -b  `pwd`/iscsi.disk0

  
  tgtadm --lld iscsi --op bind --mode target --tid 1 -I ALL
  tgtadm --lld iscsi --op show --mode target

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