amd64/99561: system hangs in FreeBSD AMD64 when writting ext2fs

[Simeon Nifos]

>Number:         99561
>Category:       amd64
>Synopsis:       system hangs in FreeBSD AMD64 when writting ext2fs
>Confidential:   no
>Severity:       critical
>Priority:       medium
>Responsible:    freebsd-amd64
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Jun 27 21:00:38 GMT 2006
>Closed-Date:
>Last-Modified:
>Originator:     Simeon Nifos
>Release:        FreeBSD AMD64 6.1 Release
>Organization:
>Environment:
FreeBSD 6.1-RELEASE FreeBSD 6.1-RELEASE #0: Sun May  7 04:15:57 UTC 2006     root at bloom.cse.buffalo.edu:/usr/obj/usr/src/sys/SMP  amd64

>Description:
 would like to report a strange behaviour of 
FreeBSD AMD64 ver. 6.1. I installed it on a 
QUAD Opteron 846 with Tayan motherbord and 4GB RAM.
I was running SMP kernel. I have an ext2fs partition
where I store all installed compilers and libraries.
I changed directory to my ext3 (ext2fs) partition
and I started compiling one of my libraries. The 
system Hanged. I repeated the same thing with several
other libraries (ATLAS(BLAS), LAPACK, ...) and
everytime
the system hanged. Then I copied the sources to /usr
and I compiled them there. No problem. Everything was
fine 
there. 

I do not know what is FreeBSD AMD64 problem when I 
compile something being in an ext2fs partition since
with FreeBSD x86 I didn't experienced similar 
behaviour. Has anybody noticed something similar?

Best!
Simeon.
>How-To-Repeat:
mount some ext2fs partition, untar lapack in it
http://www.netlib.org/lapack/lapack.tgz
cd in LAPACK directory and change the makefiles according to 
your platform. Then type make and wait a little bit. You will
see that after 1-2 minutes the system will hang ...
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: