User-mode Linux kernel port

Email Archive: user-mode-linux-user (read-only)

Re: [uml-user] apache2 won't start with v3.6-rc5 (kernel v3.5 works fine)

From: Richard Weinberger <richard@no...> - 2012-09-10 18:23

Thread View

Thread	Author	Date
[uml-user] apache2 won't start with v3.6-rc5 (kernel v3.5 works fine)	Toralf Förster <toralf.foerster@gm...>

Re: [uml-user] apache2 won't start with v3.6-rc5 (kernel v3.5 works fine)

From: richard -rw- weinberger <richard.weinberger@gm...> - 2012-09-09 12:48

On Sun, Sep 9, 2012 at 12:01 PM, Toralf Förster <toralf.foerster@...> wrote:
> Hi,
>
> with current git tree 3.6-rc5 I cannot longer start apache2 at a
> UML image with an unstable Gentoo Linux.
>
> The apache error log gives :
>
> [Sun Sep 09 11:53:25.225818 2012] [core:emerg] [pid 1054:tid 1078662848]
> (22)Invalid argument: AH00023: Couldn't create the rewrite-map mutex
> AH00016: Configuration Failed

Can you please find out which system call is failing with EINVAL?
A git bisect would also nice to have. :-)

-- 
Thanks,
//richard

Re: [uml-user] apache2 won't start with v3.6-rc5 (kernel v3.5 works fine)

From: Toralf Förster <toralf.foerster@gm...> - 2012-09-09 16:37

Attachments: strace.out.gz

On 09/09/2012 02:48 PM, richard -rw- weinberger wrote:
> On Sun, Sep 9, 2012 at 12:01 PM, Toralf Förster <toralf.foerster@...> wrote:
>> Hi,
>>
>> with current git tree 3.6-rc5 I cannot longer start apache2 at a
>> UML image with an unstable Gentoo Linux.
>>
>> The apache error log gives :
>>
>> [Sun Sep 09 11:53:25.225818 2012] [core:emerg] [pid 1054:tid 1078662848]
>> (22)Invalid argument: AH00023: Couldn't create the rewrite-map mutex
>> AH00016: Configuration Failed
> 
> Can you please find out which system call is failing with EINVAL?
I attached the output of

strace -o /strace.out /usr/sbin/apache2 -D DEFAULT_VHOST -D INFO -D
MANUAL -D SSL -D SSL_DEFAULT_VHOST -D LANGUAGE -D STATUS -D SUEXEC -D
DOC -D PHP5 -k start

Does it gives you the info ?

> A git bisect would also nice to have. :-)
> 
ofc - although it needs a little bit time

-- 
MfG/Sincerely
Toralf Förster
pgp finger print: 7B1A 07F4 EC82 0F90 D4C2 8936 872A E508 7DB6 9DA3

Re: [uml-user] apache2 won't start with v3.6-rc5 (kernel v3.5 works fine)

From: Richard Weinberger <richard@no...> - 2012-09-09 16:55

Attachments: signature.asc

Am 09.09.2012 18:36, schrieb Toralf Förster:
> On 09/09/2012 02:48 PM, richard -rw- weinberger wrote:
>> On Sun, Sep 9, 2012 at 12:01 PM, Toralf Förster <toralf.foerster@...> wrote:
>>> Hi,
>>>
>>> with current git tree 3.6-rc5 I cannot longer start apache2 at a
>>> UML image with an unstable Gentoo Linux.
>>>
>>> The apache error log gives :
>>>
>>> [Sun Sep 09 11:53:25.225818 2012] [core:emerg] [pid 1054:tid 1078662848]
>>> (22)Invalid argument: AH00023: Couldn't create the rewrite-map mutex
>>> AH00016: Configuration Failed
>>
>> Can you please find out which system call is failing with EINVAL?
> I attached the output of
> 
> strace -o /strace.out /usr/sbin/apache2 -D DEFAULT_VHOST -D INFO -D
> MANUAL -D SSL -D SSL_DEFAULT_VHOST -D LANGUAGE -D STATUS -D SUEXEC -D
> DOC -D PHP5 -k start
> 
> Does it gives you the info ?

Kind of. semctl() fails for whatever reason.

semget(IPC_PRIVATE, 1, IPC_CREAT|0600)  = 32769
semctl(32769, 0, IPC_64|SETVAL, 0xbfa05178) = -1 EINVAL (Invalid argument)
semctl(32769, 0, IPC_64|IPC_RMID, 0xbfa05158) = -1 EINVAL (Invalid argument)

>> A git bisect would also nice to have. :-)
>>
> ofc - although it needs a little bit time

Would be great. :-)
Apache2 works here fine...

Thanks,
//richard

Re: [uml-user] apache2 won't start with v3.6-rc5 (kernel v3.5 works fine)

From: Toralf Förster <toralf.foerster@gm...> - 2012-09-10 13:56

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On 09/09/2012 06:55 PM, Richard Weinberger wrote:
> Kind of. semctl() fails for whatever reason.
> 
> semget(IPC_PRIVATE, 1, IPC_CREAT|0600)  = 32769 semctl(32769, 0,
> IPC_64|SETVAL, 0xbfa05178) = -1 EINVAL (Invalid argument) 
> semctl(32769, 0, IPC_64|IPC_RMID, 0xbfa05158) = -1 EINVAL (Invalid
> argument)
> 
>>> A git bisect would also nice to have. :-)

I tried it yesterday evening - but I'm unsure anout the result
(automating the bisecting is difficult b/c sometimes I've start up
errors / core dumps *and* the issue seems to be not 100% reproduceable.
nevertheless I found this after 2 attempts :

commit c1d7e01d7877a397655277a920aeaa3830ed9461
Author: Will Deacon <will.deacon@...>
Date:   Mon Jul 30 14:42:46 2012 -0700

    ipc: use Kconfig options for __ARCH_WANT_[COMPAT_]IPC_PARSE_VERSION

    Rather than #define the options manually in the architecture code, add
    Kconfig options for them and select them there instead.  This also
allows
    us to select the compat IPC version parsing automatically for
platforms
    using the old compat IPC interface.

    Reported-by: Andrew Morton <akpm@...>
    Signed-off-by: Will Deacon <will.deacon@...>
    Cc: Arnd Bergmann <arnd@...>
    Cc: Chris Metcalf <cmetcalf@...>
    Cc: Catalin Marinas <catalin.marinas@...>
    Signed-off-by: Andrew Morton <akpm@...>
    Signed-off-by: Linus Torvalds <torvalds@...>



Furthermore for a bad commit this error msg appears during shutdown of
the UML :


 * Deactivating swap devices ...
                                    [ ok ]
 * Removing dm-crypt mappings
 *   crypt-swap ...
Kernel not configured for semaphores (System V IPC). Not using udev
synchronisation code.                 [ ok ]
 * Stopping udev ...
                                    [ ok ]


I might run bisecting again if wanted.

- -- 
MfG/Sincerely
Toralf Förster
pgp finger print: 7B1A 07F4 EC82 0F90 D4C2 8936 872A E508 7DB6 9DA3
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.19 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://www.enigmail.net/

iEYEARECAAYFAlBN8YMACgkQhyrlCH22naMWdQCeJBRvMhJH8b0FaKYSV7Bc+xd9
LfAAoITehysHAlNFQmkBy2n850R8Tqm6
=b+EO
-----END PGP SIGNATURE-----

Re: [uml-user] apache2 won't start with v3.6-rc5 (kernel v3.5 works fine)

From: Richard Weinberger <richard@no...> - 2012-09-10 14:24

Attachments: signature.asc

Am 10.09.2012 15:56, schrieb Toralf Förster:
> On 09/09/2012 06:55 PM, Richard Weinberger wrote:
>> Kind of. semctl() fails for whatever reason.
> 
>> semget(IPC_PRIVATE, 1, IPC_CREAT|0600)  = 32769 semctl(32769, 0,
>> IPC_64|SETVAL, 0xbfa05178) = -1 EINVAL (Invalid argument) 
>> semctl(32769, 0, IPC_64|IPC_RMID, 0xbfa05158) = -1 EINVAL (Invalid
>> argument)
> 
>>>> A git bisect would also nice to have. :-)
> 
> I tried it yesterday evening - but I'm unsure anout the result
> (automating the bisecting is difficult b/c sometimes I've start up
> errors / core dumps *and* the issue seems to be not 100% reproduceable.
> nevertheless I found this after 2 attempts :
> 
> commit c1d7e01d7877a397655277a920aeaa3830ed9461
> Author: Will Deacon <will.deacon@...>
> Date:   Mon Jul 30 14:42:46 2012 -0700
> 
>     ipc: use Kconfig options for __ARCH_WANT_[COMPAT_]IPC_PARSE_VERSION
> 
>     Rather than #define the options manually in the architecture code, add
>     Kconfig options for them and select them there instead.  This also
> allows
>     us to select the compat IPC version parsing automatically for
> platforms
>     using the old compat IPC interface.
> 
>     Reported-by: Andrew Morton <akpm@...>
>     Signed-off-by: Will Deacon <will.deacon@...>
>     Cc: Arnd Bergmann <arnd@...>
>     Cc: Chris Metcalf <cmetcalf@...>
>     Cc: Catalin Marinas <catalin.marinas@...>
>     Signed-off-by: Andrew Morton <akpm@...>
>     Signed-off-by: Linus Torvalds <torvalds@...>
> 

Look like this commit broke SystemV semaphores on UML.
Can you please send me your .config?

I have an idea. :)

Thanks,
//richard

Re: [uml-user] apache2 won't start with v3.6-rc5 (kernel v3.5 works fine)

From: Toralf Förster <toralf.foerster@gm...> - 2012-09-10 17:37

Attachments: .config_uml .config_uml.sig

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On 09/10/2012 04:23 PM, Richard Weinberger wrote:
> Am 10.09.2012 15:56, schrieb Toralf Förster:
>> On 09/09/2012 06:55 PM, Richard Weinberger wrote:
>>> Kind of. semctl() fails for whatever reason.
>> 
>>> semget(IPC_PRIVATE, 1, IPC_CREAT|0600)  = 32769 semctl(32769,
>>> 0, IPC_64|SETVAL, 0xbfa05178) = -1 EINVAL (Invalid argument) 
>>> semctl(32769, 0, IPC_64|IPC_RMID, 0xbfa05158) = -1 EINVAL
>>> (Invalid argument)
>> 
>>>>> A git bisect would also nice to have. :-)
>> 
>> commit c1d7e01d7877a397655277a920aeaa3830ed9461 Author: Will
>> Deacon <will.deacon@...> Date:   Mon Jul 30 14:42:46 2012
>> -0700
..
>> 
> 
> Look like this commit broke SystemV semaphores on UML. Can you
> please send me your .config?
> 
> I have an idea. :)

Great config attached

- -BTW I bisected it again to this commit (now with a fully-automated
script)

- -- 
MfG/Sincerely
Toralf Förster
pgp finger print: 7B1A 07F4 EC82 0F90 D4C2 8936 872A E508 7DB6 9DA3
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.19 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://www.enigmail.net/

iEYEARECAAYFAlBOJWwACgkQhyrlCH22naM6RwCdEbzSPtz1nfdboC46AnL/ZlgL
4xoAn273PPR/lsCgOhhSXa8A+LlYFAkH
=pMHK
-----END PGP SIGNATURE-----

Re: [uml-user] apache2 won't start with v3.6-rc5 (kernel v3.5 works fine)

From: Richard Weinberger <richard@no...> - 2012-09-10 18:23

Attachments: Message as HTML signature.asc

Re: [uml-user] apache2 won't start with v3.6-rc5 (kernel v3.5 works fine)

From: Toralf Förster <toralf.foerster@gm...> - 2012-09-10 19:02

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On 09/10/2012 08:23 PM, Richard Weinberger wrote:
> Does the attached patch fix the issue for you?
> 
yes
:-)



BTW and now to a complete different thing :
Why is the kernel option CONFIG_CRYPTO_AES_NI_INTEL not selectable for
UML ?



- -- 
MfG/Sincerely
Toralf Förster
pgp finger print: 7B1A 07F4 EC82 0F90 D4C2 8936 872A E508 7DB6 9DA3
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.19 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://www.enigmail.net/

iEYEARECAAYFAlBOOTMACgkQhyrlCH22naN0UgCgpr0J0mHwjtEpzBsXHCrUm4q9
c4MAoLePTLsGuxcNf/NMkDWMFEtqUkid
=8F3v
-----END PGP SIGNATURE-----

Re: [uml-user] apache2 won't start with v3.6-rc5 (kernel v3.5 works fine)

From: Richard Weinberger <richard@no...> - 2012-09-10 19:14

Attachments: signature.asc

Am 10.09.2012 21:02, schrieb Toralf Förster:
> On 09/10/2012 08:23 PM, Richard Weinberger wrote:
>> Does the attached patch fix the issue for you?
> 
> yes
> :-)

Good.

> 
> 
> BTW and now to a complete different thing :
> Why is the kernel option CONFIG_CRYPTO_AES_NI_INTEL not selectable for
> UML ?

Hmm, It does not work on UML because that's a HW crypto module.
Let me look a bit closer at the issue maybe we can support it in some way.

Thanks,
//richard

Re: [uml-user] apache2 won't start with v3.6-rc5 (kernel v3.5 works fine)

From: Toralf Förster <toralf.foerster@gm...> - 2012-09-24 19:23

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On 09/10/2012 08:23 PM, Richard Weinberger wrote:
> 
> Does the attached patch fix the issue for you?
> 
> Thanks, //richard
> 
Seems, that this patch won't make it into 3.6, or ?
(or is it only a work around of an underlying issue ?)

- -- 
MfG/Sincerely
Toralf Förster
pgp finger print: 7B1A 07F4 EC82 0F90 D4C2 8936 872A E508 7DB6 9DA3
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.19 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://www.enigmail.net/

iEYEARECAAYFAlBgsycACgkQhyrlCH22naP3gQCgrcnhvtyrusDl3I8I7lqlqTun
GVQAn0OafREGTR7FTYsHw5B8GdtRqLtT
=0XEg
-----END PGP SIGNATURE-----

Re: [uml-user] apache2 won't start with v3.6-rc5 (kernel v3.5 works fine)

From: Richard Weinberger <richard@no...> - 2012-09-24 19:25

Attachments: signature.asc

Am 24.09.2012 21:23, schrieb Toralf Förster:
> On 09/10/2012 08:23 PM, Richard Weinberger wrote:
> 
>> Does the attached patch fix the issue for you?
> 
>> Thanks, //richard
> 
> Seems, that this patch won't make it into 3.6, or ?
> (or is it only a work around of an underlying issue ?)

It will.
Currently I'm preparing the pull request. :P

Thanks,
//richard

Re: [uml-user] apache2 won't start with v3.6-rc5 (kernel v3.5 works fine)

From: Toralf Förster <toralf.foerster@gm...> - 2012-09-29 20:10

Attachments: config config.sig

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On 09/24/2012 09:25 PM, Richard Weinberger wrote:
> Am 24.09.2012 21:23, schrieb Toralf Förster:
>> On 09/10/2012 08:23 PM, Richard Weinberger wrote:
>> 
>>> Does the attached patch fix the issue for you?
>> 
>>> Thanks, //richard
>> 
>> Seems, that this patch won't make it into 3.6, or ? (or is it
>> only a work around of an underlying issue ?)
> 
> It will. Currently I'm preparing the pull request. :P
> 
> Thanks, //richard
> 
yep, integrated now - thx.

But the current version sporadically crashes if apache2 + phpmyadmin
is used - but I can't figure out a reproducible scenario :-( :

...
VFS: Mounted root (ext3 filesystem) readonly on device 98:0.
Kernel panic - not syncing: Segfault with no mm
083cc1c8:  [<0831875d>]
 dump_stack+0x22/0x24
083cc1e0:  [<08318811>]
 panic+0x7a/0x181
083cc208:  [<0806266c>]


- -- 
MfG/Sincerely
Toralf Förster
pgp finger print: 7B1A 07F4 EC82 0F90 D4C2 8936 872A E508 7DB6 9DA3
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.19 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://www.enigmail.net/

iEYEARECAAYFAlBnVZ4ACgkQhyrlCH22naNadwCgqFXXIxMWuIaakuAEBP5NBCa/
M78An1AACxpUEo0i7z+0jNfwqJeCfnEz
=6CKx
-----END PGP SIGNATURE-----

Re: [uml-user] apache2 won't start with v3.6-rc5 (kernel v3.5 works fine)

From: Richard Weinberger <richard@no...> - 2012-09-29 20:30

Am Sat, 29 Sep 2012 22:10:07 +0200
schrieb Toralf Förster <toralf.foerster@...>:

> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> On 09/24/2012 09:25 PM, Richard Weinberger wrote:
> > Am 24.09.2012 21:23, schrieb Toralf Förster:
> >> On 09/10/2012 08:23 PM, Richard Weinberger wrote:
> >> 
> >>> Does the attached patch fix the issue for you?
> >> 
> >>> Thanks, //richard
> >> 
> >> Seems, that this patch won't make it into 3.6, or ? (or is it
> >> only a work around of an underlying issue ?)
> > 
> > It will. Currently I'm preparing the pull request. :P
> > 
> > Thanks, //richard
> > 
> yep, integrated now - thx.
> 
> But the current version sporadically crashes if apache2 + phpmyadmin
> is used - but I can't figure out a reproducible scenario :-( :

Since -rc7?
rc7 contains 4 fixes from Al, you can try to revert them.
Maybe he fixed too much ;)

Thanks,
//richard

[uml-user] host-fs problems with current kernel

From: Toralf Förster <toralf.foerster@gm...> - 2012-10-06 09:37

Attachments: linux-v3.6--showconfig.txt

There seems to be a problem with UML and hostfs.

When I start a current UML (Gentoo unstable Linux) and call
http://n22_uml/phpsysinfo/index.php?disp=dynamic , then sometimes (but
not every time) UML become unresponsive, 1 linux-3.6 process at the host
runs at 100%, nothing is written to the log, ssh into the UML isn't
longer possible, kill -9 is the only way.

If I comment out the entry in the /etc/fstab of the guest :

#n22:/                  /mnt/n22        hostfs          defaults

I (till now) not observed that issue.

-- 
MfG/Sincerely
Toralf Förster
pgp finger print: 7B1A 07F4 EC82 0F90 D4C2 8936 872A E508 7DB6 9DA3