Fwd: 2.6.26.x hangs on amd64/smp
- From: BERTRAND Joel <bertrand@xxxxxxxxxxxxxxxxxxxx>
- Date: Mon, 29 Sep 2008 11:00:58 +0200
From: BERTRAND Joel <joel.bertrand@xxxxxxxxxxx>
Newsgroups: linux.kernel
Subject: 2.6.26.x hangs on amd64/smp
Reply-To: mt1@xxxxxxxxxxx
Hello,
System : debian/testing, tested kernels 2.6.26, 2.6.26.3, 2.6.26.5.
Hardware : core2duo, 4 GB, raid1 software, CFQ scheduler.
I have written a program that work on cartographic data. This program
is started as a daemon and does some fork() (and pthread_create()). I
have seen that it requires 6 GB to work, each process takes 1,5 GB. The
same program works fine under FreeBSD or Solaris (on of course the same
hardware).
When it starts, I can see disk activity (swap), and after 2 or 3
minutes, kernel crashes without any trace (no more disk activity, sysrq
does nothing...). I have reproduced this bug when I was logged on
console. There was no messsage.
If I introduce some nanosleep() syscalls in my code, crash is more
difficult to reproduce.
cauchy:[~] > cat /proc/mdstat
Personalities : [raid1]
md1 : active raid1 sdb2[1] sda2[0]
5855616 blocks [2/2] [UU]
md2 : active raid1 sdb3[1] sda3[0]
48829440 blocks [2/2] [UU]
md3 : active raid1 sdb4[1] sda4[0]
101474496 blocks [2/2] [UU]
md0 : active raid1 sdb1[1] sda1[0]
128384 blocks [2/2] [UU]
unused devices: <none>
swap in on /dev/md1.
cauchy:[~] > df -h
Sys. de fich. Tail. Occ. Disp. %Occ. Monté sur
/dev/md2 46G 28G 16G 64% /
tmpfs 2,0G 0 2,0G 0% /lib/init/rw
udev 10M 124K 9,9M 2% /dev
tmpfs 2,0G 0 2,0G 0% /dev/shm
/dev/md0 122M 60M 56M 52% /boot
/dev/md3 96G 56G 35G 62% /home
cauchy:[~] >
dmesg :
Linux version 2.6.26.5 (root@cauchy) (gcc version 4.3.1 (Debian 4.3.1-9)
) #16 SMP PREEMPT Tue Sep 23 15:54:59 CEST 2008
...
ACPI: BIOS bug: multiple APIC/MADT found, using 0
ACPI: If "acpi_apic_instance=2" works better, notify
linux-acpi@xxxxxxxxxxxxxxx
ACPI: DMI detected: Toshiba
...
.config: see http://www.systella.fr/~bertrand/config.2.6.26.5
Some bad news... I'm now able to reproduce this bug _without_ X.
Test configuration :
debian/testing up to date (minimal system with 2.6.26.5 kernel from
ftp.kernel.org build with gcc-4.3).
I have started my test program on a ssh connection. Console enters
in DPMS mode (power off). When system crashes, screen can be switch on
when I press on a key. But, there is not information on console.
Sysrq key doesn't work anymore. Any disc activities. It is
impossible to log on and I have to reboot with power button...
Regards,
JKB
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