[uml-devel] NPTL can't be disabled in fc4?

[uml-devel] NPTL can't be disabled in fc4?

[William Stearns]

Good afternoon, all,
 	I tried to boot an fc4 VM ( http://www.stearns.org/uml-root/ )on 
zaphod.
 	I compiled 2.6.12-mm1-um26121_20050627 at Jeff's suggestion, and 
still get:

Setting hostname placeholder.stearns.org:  [  OK  ]
set_thread_area failed when setting up thread-local storage

 	It doesn't appear that any of the patches in Jeff's current 2.6 
quilt patch set refer to set_thread_area (Although I could believe that 
one of them addresses it indirectly so the string doesn't show up in the 
patches.)
 	Even adding LD_ASSUME_KERNEL=2.4.1 to the end of the kernel 
command line (which, according to doc/kernel-parameters.txt passes that 
environment variable on to the environment inside the VM) doesn't help. 
LD_ASSUME_KERNEL=2.2.5 on the kernel command line also exhibits 
set_thread_area failed....
 	I've also tried disabling nptl from userspace with the following 
added lines:

/etc/profile.d/glibc.sh
export LD_ASSUME_KERNEL=2.4.19

/etc/init.d/functions
export LD_ASSUME_KERNEL=2.4.19

/etc/initscript : (make mode 755)
export LD_ASSUME_KERNEL=2.4.19
eval exec "$4"

 	Still hitting that set_thread_area error.

 	Is there _any_ way to convince an fc4 userspace to not use NPTL?
 	Cheers,
 	- Bill

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Re: [uml-devel] NPTL can't be disabled in fc4?

[Blaisorblade]

On Monday 27 June 2005 23:13, William Stearns wrote:
> Good afternoon, all,
>  	I tried to boot an fc4 VM ( http://www.stearns.org/uml-root/ )on
> zaphod.

>  	Is there _any_ way to convince an fc4 userspace to not use NPTL?
Yes, it's indicated on the FC4 release notes, I already posted this link 
(http://fedora.redhat.com/docs/release-notes/fc4/).
-- 
Inform me of my mistakes, so I can keep imitating Homer Simpson's "Doh!".
Paolo Giarrusso, aka Blaisorblade (Skype ID "PaoloGiarrusso", ICQ 215621894)
http://www.user-mode-linux.org/~blaisorblade

		
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Re: [uml-devel] NPTL can't be disabled in fc4?

[William Stearns]

Good afternoon, all,

On Mon, 27 Jun 2005, William Stearns wrote:

> 	I tried to boot an fc4 VM ( http://www.stearns.org/uml-root/ )on 
> zaphod.
> 	I compiled 2.6.12-mm1-um26121_20050627 at Jeff's suggestion, and 
> still get:
>
> Setting hostname placeholder.stearns.org:  [  OK  ]
> set_thread_area failed when setting up thread-local storage
>
> 	It doesn't appear that any of the patches in Jeff's current 2.6 quilt 
> patch set refer to set_thread_area (Although I could believe that one of them 
> addresses it indirectly so the string doesn't show up in the patches.)
> 	Even adding LD_ASSUME_KERNEL=2.4.1 to the end of the kernel command 
> line (which, according to doc/kernel-parameters.txt passes that environment 
> variable on to the environment inside the VM) doesn't help. 
> LD_ASSUME_KERNEL=2.2.5 on the kernel command line also exhibits 
> set_thread_area failed....
> 	I've also tried disabling nptl from userspace with the following 
> added lines:
>
> /etc/profile.d/glibc.sh
> export LD_ASSUME_KERNEL=2.4.19
>
> /etc/init.d/functions
> export LD_ASSUME_KERNEL=2.4.19
>
> /etc/initscript : (make mode 755)
> export LD_ASSUME_KERNEL=2.4.19
> eval exec "$4"
>
> 	Still hitting that set_thread_area error.
>
> 	Is there _any_ way to convince an fc4 userspace to not use NPTL?

 	Oops, forgot to mention that I already have renamed /lib/tls 
(already done in stock dowmloadable root_fs....) and /usr/lib/tls (not 
done in downloadable root_fs, but done by hand here.

Also, Blaisorblade wrote:

> Yes, it's indicated on the FC4 release notes, I already posted this link
> (http://fedora.redhat.com/docs/release-notes/fc4/).

 	I tried adding the following line to /etc/profile.d/glibc.sh, 
/etc/init.d/functions, and /etc/initscript (skipped {,64} because this is 
32 bit only):
export LD_LIBRARY_PATH=/lib/obsolete/linuxthreads

 	and I still get:

Setting hostname placeholder.stearns.org:  [  OK  ]
set_thread_area failed when setting up thread-local storage
/etc/rc.d/rc.sysinit: line 323:   757 Done                    echo 
"raidautorun /dev/md0"
        758 Segmentation fault      | nash --quiet
set_thread_area failed when setting up thread-local storage
/etc/rc.d/rc.sysinit: line 340:   760 Done                    echo 
"mkdmnod"
        761 Segmentation fault      | /sbin/nash --quiet >/dev/null 2>&1
set_thread_area failed when setting up thread-local storage
/etc/rc.d/rc.sysinit: line 340:   762 Segmentation fault 
/sbin/lvm.static vgscan --mknodes --ignorelockingfailure >/dev/null 2>&1
Checking filesystems
Checking all file systems.
[/sbin/fsck.ext2 (1) -- /] fsck.ext2 -a /dev/ubd/0
set_thread_area failed when setting up thread-local storage
Warning... fsck.ext2 for device /dev/ubd/0 exited with signal 11.
[FAILED]

*** An error occurred during the file system check.
*** Dropping you to a shell; the system will reboot
*** when you leave the shell.
Give root password for maintenance
(or type Control-D to continue):

 	Blaisor, was there some other piece of that release note you were 
referring to?

 	I've also tried, in addition to the three system files above, 
adding the "LD_ASSUME_KERNEL=2.4.19 
LD_LIBRARY_PATH=/lib/obsolete/linuxthreads" to the end of the kernel 
command line.  Same problem.
 	Cheers,
 	- Bill

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--------------------------------------------------------------------------
William Stearns (wstearns@pobox.com).  Mason, Buildkernel, freedups, p0f,
rsync-backup, ssh-keyinstall, dns-check, more at:   http://www.stearns.org
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Re: [uml-devel] NPTL can't be disabled in fc4?

[Henrik Nordstrom]

On Mon, 27 Jun 2005, William Stearns wrote:

> "raidautorun /dev/md0"
>       758 Segmentation fault      | nash --quiet

nash is statically linked

   ldd /sbin/nash
         not a dynamic executable

Why they use nash in the rc.sysinit script beats me. It is only supposed 
to be used in the initrd while bringing up the base hardware required to 
boot, not the full system.

You should be able to replace this with and mdadm call, given a suitable 
/etc/mdadm.conf file. Or disable it entirely if raid support is not 
needed.

> /etc/rc.d/rc.sysinit: line 340:   762 Segmentation fault /sbin/lvm.static
> vgscan --mknodes --ignorelockingfailure >/dev/null 2>&1

similar problem here.. lvm.static is a statically linked binary.

Regards
Henrik


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