Re: Kernel lock-up with NPTL

["'Carlo Wood'" <carlo alinoe com>]

On Thu, Jun 05, 2003 at 10:39:44AM -0700, Perez-Gonzalez, Inaky wrote:
> Can you describe the problem? Like in kernel version
> _plus_ patches that you are using,

plain 2.5.69 (Linus)

> glibc CVS drop date

RedHat 9 update (glibc-2.3.2-27.9)

>, NPTL version,

idem

> the program that caused it, 

See http://bugzilla.kernel.org/show_bug.cgi?id=769
for my original description.

Basically, get a CVS copy of libcwd:

cvs -d:pserver:anonymous cvs sourceforge net:/cvsroot/libcwd login

(press return on passwd)

cvs -z3 -d:pserver:anonymous cvs sourceforge net:/cvsroot/libcwd co libcwd

Backup to the version known to cause the problem:

cd libcwd
cvs update -D "2003/06/02 23:19:18 PST"

Compile libcwd:

./bootstrap
CC=gcc-cvs-3.4 CXX=g++-cvs-3.4 ./configure --enable-maintainer-mode --enable-debugt --enable-debugm --enable-debug --disable-nonthreading --disable-debug-output

(I didn't TRY this with another compiler, but
 gcc-3.2 or 3.3 should give the same results -
 the compiler version is not important here).

make
cd testsuite
make threads_threads_shared

Then run 'threads_threads_shared' a few times.  It should
lock up the kernel.

> how did you force it to happen ... does SysRq work? 

SysRq?  I got a key like that - but I am pretty damn sure
the keyboard isn't read anymore.

> Can you get a dump on a serial console of Ctrl+ScrollLock?

I don't have a serial console.  I do have a second PC
running RH8 - but I can't login when everything freezes:
I get a 'host unreachable'.  Note that when playing mp3s
with xmms, the last second or so of the music keeps repeating
after locking up.


> Is it easy to reproduce or it happens randomly?

Very easy - about once every two runs.

> Iñaky Pérez-González -- Not speaking for Intel -- all opinions are my own
> (and my fault)

I am now trying to set up a User Mode Linux for RH9 with this kernel :/

-- 
Carlo Wood <carlo alinoe com>