[Xen-users] Debian 6.0 with Remus(Xen 4.2) and Jeremy Kernel 2.6.32.57 does not work

["D K" <daniel-knobe@xxxxxx>]

Hallo Mailinglist:),
I have a question about using Remus and may be about Xen, because the way i use Remus fails and I think it can be a Xen problem. I hope somebody of you have an idea of what my problem is and may be have solution.

First I want to describe my enviroment:

Hardware:
PC: I have two Systems with completly identical Hardware
Network: Both Systems are connected by a Switch

Software:
OS: The fully updated Debian 6.0
Dom0 Kernel: I downloaded the Jeremy Kernel in the stable Version 2.6.32.57 with the following config: http://pgb.game-host.org/xen/config
Xen: Version 4.2.-testing from git

Xen Guest:
OS: The fully updated Debian 6.0 without any modifications
Config: I used the following config http://pgb.game-host.org/xen/debian.cfg (for simplicity I disabled the vif)


The problem:
The migration with xen works pretty good and without any problems.
I use the following command to create the guest:

xl create debian.cfg
Output:
Parsing config from debian.cfg
got a tsc mode string: "default"
xc: info: VIRTUAL MEMORY ARRANGEMENT:
  Loader:        0000000000100000->000000000019bb24
  TOTAL:         0000000000000000->000000001f800000
  ENTRY ADDRESS: 0000000000100000
xc: info: PHYSICAL MEMORY ALLOCATION:
  4KB PAGES: 0x0000000000000200
  2MB PAGES: 0x00000000000000fb
  1GB PAGES: 0x0000000000000000
Daemon running with PID 3630

When I want to use remus for example with the following commandlist:
xl remus 6 129.217.43.54

He replicates the vm on the backup host with the following output:
migration target: Ready to receive domain.
Saving to migration stream new xl format (info 0x0/0x0/582)
Loading new save file <incoming migration stream> (new xl fmt info 0x0/0x0/582)
 Savefile contains xl domain config
got a tsc mode string: "default"

Then after waiting sometime sometimes after one second sometimes after 3 minutes the following error occured on the primary host:
*** glibc detected *** xl: free(): invalid next size (normal): 0x08f05410 ***
======= Backtrace: =========
/lib/i686/nosegneg/libc.so.6(+0x6c0d1)[0xb75560d1]
/lib/i686/nosegneg/libc.so.6(+0x6d928)[0xb7557928]
/lib/i686/nosegneg/libc.so.6(cfree+0x6d)[0xb755aa4d]
/usr/lib/libxenlight.so.2.0(+0x31d1a)[0xb76a8d1a]
/usr/lib/libxenlight.so.2.0(+0x37072)[0xb76ae072]
/usr/lib/libxenlight.so.2.0(+0x37e1b)[0xb76aee1b]
/usr/lib/libxenlight.so.2.0(+0x3848f)[0xb76af48f]
/usr/lib/libxenlight.so.2.0(libxl_domain_remus_start+0x194)[0xb768f2bf]
xl[0x805045e]
xl[0x804d2be]
/lib/i686/nosegneg/libc.so.6(__libc_start_main+0xe6)[0xb7500ca6]
xl[0x804cb91]
======= Memory map: ========
08048000-08068000 r-xp 00000000 08:01 753904     /usr/sbin/xl
08068000-0806a000 rw-p 0001f000 08:01 753904     /usr/sbin/xl
08dcc000-08f1c000 rw-p 00000000 00:00 0          [heap]
b7300000-b7321000 rw-p 00000000 00:00 0
b7321000-b7400000 ---p 00000000 00:00 0
b741a000-b744c000 rw-p 00000000 00:00 0
b744c000-b7469000 r-xp 00000000 08:01 2342915    /lib/libgcc_s.so.1
b7469000-b746a000 rw-p 0001c000 08:01 2342915    /lib/libgcc_s.so.1
b747d000-b747e000 rw-p 00000000 00:00 0
b747e000-b7491000 r-xp 00000000 08:01 2459916    /usr/lib/libz.so.1.2.3.4
b7491000-b7492000 rw-p 00013000 08:01 2459916    /usr/lib/libz.so.1.2.3.4
b7492000-b7493000 rw-p 00000000 00:00 0
b7493000-b74a3000 r-xp 00000000 08:01 2342947    /lib/libbz2.so.1.0.4
b74a3000-b74a4000 rw-p 00010000 08:01 2342947    /lib/libbz2.so.1.0.4
b74a4000-b74a6000 r-xp 00000000 08:01 2369149    /lib/i686/nosegneg/libdl-2.11.3.so
b74a6000-b74a7000 r--p 00001000 08:01 2369149    /lib/i686/nosegneg/libdl-2.11.3.so
b74a7000-b74a8000 rw-p 00002000 08:01 2369149    /lib/i686/nosegneg/libdl-2.11.3.so
b74a8000-b74ab000 r-xp 00000000 08:01 2342976    /lib/libuuid.so.1.3.0
b74ab000-b74ac000 rw-p 00002000 08:01 2342976    /lib/libuuid.so.1.3.0
b74ac000-b74ae000 r-xp 00000000 08:01 2369159    /lib/i686/nosegneg/libutil-2.11.3.so
b74ae000-b74af000 r--p 00001000 08:01 2369159    /lib/i686/nosegneg/libutil-2.11.3.so
b74af000-b74b0000 rw-p 00002000 08:01 2369159    /lib/i686/nosegneg/libutil-2.11.3.so
b74b0000-b74b6000 r-xp 00000000 08:01 648516     /usr/lib/libblktapctl.so.1.0.0
b74b6000-b74b7000 rw-p 00005000 08:01 648516     /usr/lib/libblktapctl.so.1.0.0
b74b7000-b74b8000 rw-p 00000000 00:00 0
b74b8000-b74bd000 r-xp 00000000 08:01 648500     /usr/lib/libxenstore.so.3.0.1
b74bd000-b74be000 rw-p 00004000 08:01 648500     /usr/lib/libxenstore.so.3.0.1
b74be000-b74c1000 rw-p 00000000 00:00 0
b74c1000-b74e9000 r-xp 00000000 08:01 648496     /usr/lib/libxenguest.so.4.2.0
b74e9000-b74ea000 rw-p 00028000 08:01 648496     /usr/lib/libxenguest.so.4.2.0
b74ea000-b762e000 r-xp 00000000 08:01 2369168    /lib/i686/nosegneg/libc-2.11.3.so
b762e000-b7630000 r--p 00144000 08:01 2369168    /lib/i686/nosegneg/libc-2.11.3.so
b7630000-b7631000 rw-p 00146000 08:01 2369168    /lib/i686/nosegneg/libc-2.11.3.so
b7631000-b7634000 rw-p 00000000 00:00 0
b7634000-b7649000 r-xp 00000000 08:01 2369158    /lib/i686/nosegneg/libpthread-2.11.3.so
b7649000-b764a000 r--p 00014000 08:01 2369158    /lib/i686/nosegneg/libpthread-2.11.3.so
b764a000-b764b000 rw-p 00015000 08:01 2369158    /lib/i686/nosegneg/libpthread-2.11.3.so
b764b000-b764d000 rw-p 00000000 00:00 0
b764d000-b7654000 r-xp 00000000 08:01 648489     /usr/lib/libyajl.so.1.0.8
b7654000-b7655000 rw-p 00006000 08:01 648489     /usr/lib/libyajl.so.1.0.8
b7655000-b7656000 rw-p 00000000 00:00 0
b7656000-b7676000 r-xp 00000000 08:01 647839     /usr/lib/libxenctrl.so.4.2.0
b7676000-b7677000 rw-p 0001f000 08:01 647839     /usr/lib/libxenctrl.so.4.2.0
b7677000-b76c6000 r-xp 00000000 08:01 648526     /usr/lib/libxenlight.so.2.0.0
b76c6000-b76c8000 rw-p 0004f000 08:01 648526     /usr/lib/libxenlight.so.2.0.0
b76c8000-b76d4000 r-xp 00000000 08:01 648530     /usr/lib/libxlutil.so.1.0.0
b76d4000-b76d5000 rw-p 0000b000 08:01 648530     /usr/lib/libxlutil.so.1.0.0
b76dd000-b76de000 ---p 00000000 00:00 0
b76de000-b76e1000 rw-p 00000000 00:00 0
b76e1000-b76e2000 ---p 00000000 00:00 0
b76e2000-b76e6000 rw-p 00000000 00:00 0
b76e6000-b76e7000 rw-p 00000000 00:00 0
b76e7000-b76e8000 rw-p 00000000 00:00 0
b76e8000-b76ec000 rw-p 00000000 00:00 0
b76ec000-b76ed000 r-xp 00000000 00:00 0          [vdso]
b76ed000-b7708000 r-xp 00000000 08:01 2342928    /lib/ld-2.11.3.so
b7708000-b7709000 r--p 0001b000 08:01 2342928    /lib/ld-2.11.3.so
b7709000-b770a000 rw-p 0001c000 08:01 2342928    /lib/ld-2.11.3.so
bff6e000-bff83000 rw-p 00000000 00:00 0          [stack]
Abgebrochen
root@DKDebian2:/etc/xen# xc: error: 0-length read: Internal error
xc: error: read_exact_timed failed (read rc: 0, errno: 0): Internal error
xc: error: Error when reading batch size (0 = Success): Internal error
xc: error: error when buffering batch, finishing (0 = Success): Internal error
migration target: Remus Failover for domain 5

I have no solution for this kind of problem and hope somebody can help me.

Thanks to everybody who will answer me :).

Best regards
Daniel

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