uml_console_write

if you enable all semaphore locking debuing and such alike, you get a
warning at uml_console_write calliong __might_sleep with irqs_disabled()

The callpath are on another machine, byt here the names are

__might_sleep
uml_console_write
__call_console_drivers
call_console_drivers
release_console_drives
vprintk
printk
ext2_warning
ext2_fill_super
get_sb_bdev
__kmalloc
ext2_get_sb
ext2_fill_super
do_kern_mount
do_new_mount
do_mount
copy_from_user_tt
excact_copy_from_user
copy_mount_options
sys_mount
execute_syscall_tt
syscall_handler_tt
unblock_signals
sig_handler_common
set_user_mode

Re: Re: UML fills /tmp irreversibly (2.6.9-bb4 on SuSE 9.2)

> That's supposed to be a 2.6.10 _Host_-Kernel? (Not 2.6.10 UM-Kernel?)

Correct.

>> The tmpfs problem is also  
>> compounded by the fact that UMLs without the fix-kill patch don't
>> exit properly, but the 2.6.9-bb4 patchset has the fix for UML.

> You say UM-Kernel 2.6.9-bb4 has that fix? (Yes, I am running 2.6.9-bb4 
> UM-Kernels)

Correct.

>> For 2.4-um, you can find the fix-kill patch here:
>> http://www.theshore.net/~caker/uml/patches/2.4.27-1um/

-Chris

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Re: Re: UML fills /tmp irreversibly (2.6.9-bb4 on SuSE 9.2)

  Hi,

I can positively confirm that the problem with /tmp filling 
irreversibly and being unable to unmount /tmp is solved under 
host kernel 2.6.10.

Unfortunately I am experiencing some new problems after the 
change from host kernel SuSE 2.6.8-24.10 to vanilla 2.6.10: 
submount-0.9: name of iocharset gets truncated when calling 
df, slmodem-2.9.10: modules complain about unknown symbols, 
swsusp: ohci1394 fails to release. But that's a different 
story, has nothing to do with UML. 

Hopefully the guys at SuSE pick up the /tmp-fixes from 2.6.10 
and backport them to their SuSE-Kernel...

  Armin

On Saturday 01 January 2005 21:10, Christopher S. Aker wrote:
> > That's supposed to be a 2.6.10 _Host_-Kernel? (Not 2.6.10
> > UM-Kernel?)
>
> Correct.
>
> >> The tmpfs problem is also
> >> compounded by the fact that UMLs without the fix-kill patch
> >> don't exit properly, but the 2.6.9-bb4 patchset has the fix for
> >> UML.
> >
> > You say UM-Kernel 2.6.9-bb4 has that fix? (Yes, I am running

Re: UML fills /tmp irreversibly (2.6.9-bb4 on SuSE 9.2)

> (Is 2.6.8-24.10 a 2.6.8 with back-ported fixes from 2.6.10 ?)

Yep, there is a batch of fixes backported to fix the breakouts ...

  Gerd

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Re: UML fills /tmp irreversibly (2.6.9-bb4 on SuSE 9.2)

  Hi Gerd,

On Monday 03 January 2005 11:13, Gerd Knorr wrote:
> > (Is 2.6.8-24.10 a 2.6.8 with back-ported fixes from 2.6.10 ?)
>
> Yep, there is a batch of fixes backported to fix the breakouts ...

Is there any chance, that the bugfixfor the 
"/tmp-fills-irreversibly-and-cannot-be-unmounted" problem, 
that seems to be fixed starting with 2.6.10-rc3-bk10 (and was
positively tested by me in the final 2.6.10) is being backported 
to a SuSE 2.6.8-XX.YY host kernel, too?

...and a happy new year!

  Armin.

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A little more info...

Re: Re: UML fills /tmp irreversibly (2.6.9-bb4 on SuSE 9.2)

That was host-kernel 2.6.10 plus skas3-v7 (and UM-kernel 2.6.9-bb4).

On Sunday 02 January 2005 10:25, I wrote:
> I can positively confirm that the problem with /tmp filling
> irreversibly and being unable to unmount /tmp is solved under
> host kernel 2.6.10.

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Re: UML fills /tmp irreversibly (2.6.9-bb4 on SuSE 9.2)

  Hi Gerd,

On Monday 03 January 2005 14:34, you wrote:
> host or uml kernel fix?  URL?  Havn't tracked stuff at all over
> xmas holidays ...

Must be a host-Kernel fix, not a uml-kernel fix, because um-kernel 
2.6.9-bb4 running on host-kernels

 -  SuSE 2.6.8-24-default
 -  SuSE 2.6.8-24.3-default
 -  SuSE 2.6.8-24.5-default
 -  SuSE 2.6.8-24.10-default

(which are actually 2.6.9-rc2, as you stated in earlier mail) makes 
the problem occur (I tested it), and Christopher S. Aker reports the 
same problem with host-kernel

 -  2.6.9-ck3
 -  2.6.10-rc2-bk7

The same um-kernel 2.6.9-bb4 on a plain kernel.org host-kernel 

 +  2.6.10

and on a kernel.org host-kernel

 +  2.6.10 with skas3-v7

does not show the problem (I tested it), and Christopher S. Aker 

[uml-user] IPV6 support

Re: UML fills /tmp irreversibly (2.6.9-bb4 on SuSE 9.2)

> Thus the bugfix must have been introduced somewhere between 
> 2.6.10-rc2-bk7 and 2.6.10-rc3-bk10.

Thats a pretty wide range (Nov 22 => Dec 16), anyone tried kernels
inbetween and can narrow that a bit?

Intrestingly mm/shmem.c (which implements shmfs/tmpfs) hasn't been
touched since Nov 19 according to bitkeeper ...

  Gerd

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Re: UML fills /tmp irreversibly (2.6.9-bb4 on SuSE 9.2)

On Tuesday 04 January 2005 12:59, you wrote:
> Intrestingly mm/shmem.c (which implements shmfs/tmpfs) 
> hasn't been touched since Nov 19 according to bitkeeper ...

I don't think the problem is in tmpfs! 

When I saw the problem for the 1st time, of cause I immediately 
blamed tmpfs and switched to a reiserfs /tmp, but to my surprise
the problem did not go away. Finally I even tested an ext3 /tmp - 
just to be sure - and the problem was reproduced, too.

That was with SuSE-2.6.8-24* Host-Kernels.

  Armin.

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