[DRBD-user] Online verify causes kernel panic in XenServer 5.5

Alexander Thieme at at sendemails.com
Wed Apr 7 07:15:11 CEST 2010

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.

Lars Ellenberg wrote:
> on freenode #drbd, you also mentioned http://pastebin.com/sixfY1JE
> which I quote here:
>    1.  block drbd1: role( Secondary -> Primary )
>    2.  block drbd1: conn( StandAlone -> Unconnected )
>    3.  block drbd1: Starting receiver thread (from drbd1_worker [4987])
>    4.  block drbd1: receiver (re)started
>    5.  block drbd1: conn( Unconnected -> WFConnection )
>    6.  block drbd1: Handshake successful: Agreed network protocol version 91
>    7.  block drbd1: conn( WFConnection -> WFReportParams )
>    8.  BUG: warning at kernel/softirq.c:143/local_bh_enable() (Not tainted)
>    9.  [<c010681a>] show_trace_log_lvl+0x1a/0x30
>   10.  [<c0107052>] show_trace+0x12/0x20
>   11.  [<c0107079>] dump_stack+0x19/0x20
>   12.  [<c012cf08>] local_bh_enable+0xa8/0xb0
>   13.  [<c02ba7ce>] lock_sock+0x8e/0xa0
>   14.  [<c02ed8c8>] tcp_setsockopt+0xb8/0x3b0
>   15.  [<c02b9fe2>] sock_common_setsockopt+0x22/0x30
>   16.  [<f0718a7f>] drbd_worker+0x29f/0x480 [drbd]
>   17.  [<f0734697>] drbd_thread_setup+0x137/0x1f0 [drbd]
>   18.  [<c0103005>] kernel_thread_helper+0x5/0x10
>   19.  =======================
> Let me point you to 4.6 of the Xen Faq
> http://wiki.xensource.com/xenwiki/XenFaq#head-a6ff59c593b136e2427534df391262f8b4ea7b1e
> 	4.6. I get "Badness in local_bh_enable at kernel/softirq.c" messages, why is this?
> 	This is fairly likely to be caused by a module compiled
> 	for native i386 rather than Xen. When building modules
> 	outside of the Xen build tree, use make ARCH=xen ....
> 	Alternative, this may be a driver that uses interrupt
> 	en/disabling instructions directly rather than the proper API....
> Well, and in this case, I'd suggest this is simply a broken build.
> And the below are results of the same.
> "Works for me".
Hi Lars,

We have downloaded the DDK for XenServer Update 1 and installed the 
kernel sources from the DDK source iso. When I try to compile the 
module, I get the following output:
make ARCH=xen KDIR=/usr/src/linux
make -C drbd drbd_buildtag.c
make[1]: Entering directory `/root/drbd-8.3.7/drbd'
make[1]: Leaving directory `/root/drbd-8.3.7/drbd'
make[1]: Entering directory `/root/drbd-8.3.7/drbd'

    Calling toplevel makefile of kernel source tree, which I believe is in

test -f ../scripts/adjust_drbd_config_h.sh && \
         KDIR=/usr/src/linux O= /bin/bash ../scripts/adjust_drbd_config_h.sh
/usr/src/linux ~/drbd-8.3.7/drbd

  Using unmodified drbd_config.h

make -C /usr/src/linux   SUBDIRS=/root/drbd-8.3.7/drbd  modules
make[2]: Entering directory 
No such file or directory
make[2]: *** No rule to make target 
make[2]: Leaving directory 
make[1]: *** [kbuild] Error 2
make[1]: Leaving directory `/root/drbd-8.3.7/drbd'
make: *** [module] Error 2

Actually, there doesn't seem to be a "xen" arch:
ls /usr/src/redhat/SOURCES/linux-2.6.18-128.1.6.el5.xs5.5.0.505.1024/arch/
alpha  arm  arm26  cris  frv  h8300  i386  ia64  m32r  m68k  m68knommu  
mips  parisc  powerpc  ppc  s390  sh  sh64  sparc  sparc64  um  v850  
x86_64  xtensa

On ##xen/freenode I got the following information:
"the normal xen sources don't have it either, either the instruction is 
out of date or it doesn't matter to select that. i've never specifically 
set arch=xen to build a kernel, it's handled by the sub-settings"

Could you please advice?

Thank you,
Alexander Thieme

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