Hello,
 I'm getting this:
....
  LD [M]  lib/zlib_deflate/zlib_deflate.o
  Building modules, stage 2.
  MODPOST
WARNING: drivers/acpi/processor.o - Section mismatch: reference to .init.data: from .text between 'acpi_processor_power_init' (at offset 0xfd8) and 'acpi_safe_halt'
WARNING: drivers/atm/he.o - Section mismatch: reference to .init.text: from .text between 'he_start' (at offset 0x1f1d) and 'he_service_tbrq'
WARNING: "cfq_pool" [block/cfq-iosched.ko] undefined!
WARNING: "ub0" [block/cfq-iosched.ko] undefined!
make[2]: *** [__modpost] Error 1
make[1]: *** [modules] Error 2
make[1]: Leaving directory `/home/eyck/40f-ovz/work/openvz-test'
make: *** [debian/stamp-build-kernel] Error 2

 when I try to build openvz-enabled kernel. I'm using 2.6.18 /pristine/
( it looks like ovz028stab039.1 already includes 2.6.18->2.6.18.8 patches,
 and one needs to dig out older 2.6.18 to make this patch apply).

is this normal? 
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ml-openvz-eyck@kuszelas.com wrote:
> Hello,
>  I'm getting this:
> ....
>   LD [M]  lib/zlib_deflate/zlib_deflate.o
>   Building modules, stage 2.
>   MODPOST
> WARNING: drivers/acpi/processor.o - Section mismatch: reference to .init.data: from .text between 'acpi_processor_power_init' (at offset 0xfd8) and 'acpi_safe_halt'
> WARNING: drivers/atm/he.o - Section mismatch: reference to .init.text: from .text between 'he_start' (at offset 0x1f1d) and 'he_service_tbrq'
> WARNING: "cfq_pool" [block/cfq-iosched.ko] undefined!
> WARNING: "ub0" [block/cfq-iosched.ko] undefined!
> make[2]: *** [__modpost] Error 1
> make[1]: *** [modules] Error 2
> make[1]: Leaving directory `/home/eyck/40f-ovz/work/openvz-test'
> make: *** [debian/stamp-build-kernel] Error 2

make sure that you have the following options enabled in your .config file:
CONFIG_USER_RESOURCE=y
CONFIG_USER_RSS_ACCOUNTING=y
CONFIG_UBC_IO_ACCT=y
CONFIG_USER_SWAP_ACCOUNTING=y
CONFIG_USER_RESOURCE_PROC=y


>  when I try to build openvz-enabled kernel. I'm using 2.6.18 /pristine/
> ( it looks like ovz028stab039.1 already includes 2.6.18->2.6.18.8 patches,
>  and one needs to dig out older 2.6.18 to make this patch apply).
> 
> is this normal? 

compilation fail - not normal, you can fill in the bug with .config file you used.
OVZ patches includes not only 2.6.18.8 fixes, but many other mainstream fixes to
make sure your whole system works stable.

Thanks,
Kirill

Eyck,

ouch, this is due to CONFIG_IOSCHED_CFQ=m
usually all the schedulers are 'y'.
plz set it temporarily to 'y' or use the patch attached. Created bug #669.

Thanks,
Kirill


eyck wrote:
>>>WARNING: drivers/acpi/processor.o - Section mismatch: reference to .init.data: from .text between 'acpi_processor_power_init' (at offset 0xfd8) and 'acpi_safe_halt'
>>>WARNING: drivers/atm/he.o - Section mismatch: reference to .init.text: from .text between 'he_start' (at offset 0x1f1d) and 'he_service_tbrq'
>>>WARNING: "cfq_pool" [block/cfq-iosched.ko] undefined!
>>>WARNING: "ub0" [block/cfq-iosched.ko] undefined!
>>>make[2]: *** [__modpost] Error 1
> 
> 
>>make sure that you have the following options enabled in your .config file:
>>CONFIG_USER_RESOURCE=y
>>CONFIG_USER_RSS_ACCOUNTING=y
>>CONFIG_UBC_IO_ACCT=y
>>CONFIG_USER_SWAP_ACCOUNTING=y
>>CONFIG_USER_RESOURCE_PROC=y
> 
>  all those are enabled
> 
> 
>>compilation fail - not normal, you can fill in the bug with .config file you used.
> 
>   OK, .config attached
> 


--- ./block/elevator.c.ve6543	2007-08-10 17:40:04.000000000 +0400
+++ ./block/elevator.c	2007-08-23 11:53:57.000000000 +0400
@@ -40,6 +40,7 @@ static DEFINE_SPINLOCK(elv_list_lock);
 static LIST_HEAD(elv_list);
 
 kmem_cache_t *cfq_pool;
+EXPORT_SYMBOL_GPL(cfq_pool);
 
 /*
  * Query io scheduler to see if the current process issuing bio may be
--- ./kernel/ub/beancounter.c.ve6543	2007-08-10 17:40:00.000000000 +0400
+++ ./kernel/ub/beancounter.c	2007-08-23 11:53:57.000000000 +0400
@@ -40,6 +40,7 @@
 static kmem_cache_t *ub_cachep;
 static struct user_beancounter default_beancounter;
 struct user_beancounter ub0;
+EXPORT_SYMBOL_GPL(ub0);
 
 const char *ub_rnames[] = {
 	"kmemsize",	/* 0 */

On Wed, 22 Aug 2007, Kirill Korotaev wrote:
> > WARNING: "cfq_pool" [block/cfq-iosched.ko] undefined!
> > WARNING: "ub0" [block/cfq-iosched.ko] undefined!

> compilation fail - not normal, you can fill in the bug with .config file you used.
 It looks like your patches brake CFQ io scheduler, without it it compiles
just fine.
 I'm using CFQ on multiple servers and it usually shows better characteristics
then adaptive/deadline, I could only get deadline to behave consistently nicer when I
removed raid cards and tested on serial ata hardware, so it would be nice to have
the option to use CFQ... 

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ml-openvz-eyck@kuszelas.com wrote:
> On Wed, 22 Aug 2007, Kirill Korotaev wrote:
> 
>>>WARNING: "cfq_pool" [block/cfq-iosched.ko] undefined!
>>>WARNING: "ub0" [block/cfq-iosched.ko] undefined!
> 
> 
>>compilation fail - not normal, you can fill in the bug with .config file you used.
> 
>  It looks like your patches brake CFQ io scheduler, without it it compiles
> just fine.

yes, as I replied 5 mins ago it broke compilation of CFQ being a module.

>  I'm using CFQ on multiple servers and it usually shows better characteristics
> then adaptive/deadline, I could only get deadline to behave consistently nicer when I
> removed raid cards and tested on serial ata hardware, so it would be nice to have
> the option to use CFQ... 

Thanks,
Kirill

> > WARNING: drivers/acpi/processor.o - Section mismatch: reference to .init.data: from .text between 'acpi_processor_power_init' (at offset 0xfd8) and 'acpi_safe_halt'
> > WARNING: drivers/atm/he.o - Section mismatch: reference to .init.text: from .text between 'he_start' (at offset 0x1f1d) and 'he_service_tbrq'
> > WARNING: "cfq_pool" [block/cfq-iosched.ko] undefined!
> > WARNING: "ub0" [block/cfq-iosched.ko] undefined!
> > make[2]: *** [__modpost] Error 1

> make sure that you have the following options enabled in your .config file:
> CONFIG_USER_RESOURCE=y
> CONFIG_USER_RSS_ACCOUNTING=y
> CONFIG_UBC_IO_ACCT=y
> CONFIG_USER_SWAP_ACCOUNTING=y
> CONFIG_USER_RESOURCE_PROC=y
 all those are enabled

> compilation fail - not normal, you can fill in the bug with .config file you used.
  OK, .config attached

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 Total Existance Failure