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SubjectPROBLEM: ia64 kernel hangs
[1.] ia64 linux 2.4.16 , 2.4.19 kernels hang with user code calling 
setrlimit() and system()

[2.] A short user code can hang ia64 systems, but not ia32 linux.

[3.] setrlimit() system() hang

[4.] 2.4.16 ia64 & 2.4.19 ia64

[5.] kernel hangs, no output, system goes unresponsive for about an hour

[6.]

#include <sys/time.h>
#include <sys/resource.h>
#include <unistd.h>

#define MAX_MEM 1000
int main(void)
{
struct rlimit my_rlimit;

my_rlimit.rlim_cur= 1024 * MAX_MEM;
my_rlimit.rlim_max= my_rlimit.rlim_cur;

setrlimit(RLIMIT_AS, &my_rlimit);
system("/bin/sh -c 'ulimit -a'");
}

[7.]

LANG=en_US
ARCH=ia64
SHELL=/bin/bash
HOSTTYPE=ia64
OSTYPE=linux-gnu
PATH=/usr/kerberos/bin:/usr/local/bin:/bin:/usr/bin:/usr/X11R6/bin

[7.1]
Linux user01 2.4.16 #1 SMP Mon Dec 10 11:03:09 CST 2001 ia64 unknown

Gnu C 2.96
Gnu make 3.79.1
binutils 2.10.91.0.2
util-linux 2.11f
mount 2.11b
modutils 2.4.6
e2fsprogs 1.26
reiserfsprogs 3.x.0f
PPP 2.4.0
Linux C Library 2.2.4
Dynamic linker (ldd) 2.2.4
Procps 2.0.7
Net-tools 1.60
Console-tools 0.3.3
Sh-utils 2.0
Modules Loaded sk98lin e100

Linux mantis 2.4.19 #2 SMP Wed Sep 11 16:53:31 CDT 2002 ia64 unknown

Gnu C 2.96
Gnu make 3.79.1
binutils 2.11.90.0.8
util-linux 2.11f
mount 2.11g
modutils 2.4.13
e2fsprogs 1.23
reiserfsprogs 3.x.0j
PPP 2.4.1
isdn4k-utils 3.1pre1
Linux C Library 2.2.4
Dynamic linker (ldd) 2.2.4
Procps 2.0.7
Net-tools 1.60
Console-tools 0.3.3
Sh-utils 2.0.11
Modules Loaded e1000 nls_iso8859-1 nls_cp437 vfat fat keybdev hid
usbkbd input usb-uhci usbcore mptscsih mptbase

[7.2]
processor : 0
vendor : GenuineIntel
arch : IA-64
family : Itanium 2
model : 0
revision : 5
archrev : 0
features : branchlong
cpu number : 41600
cpu regs : 4
cpu MHz : 995.901000
itc MHz : 995.901000
BogoMIPS : 1488.97

[7.2]
e1000 133632 1
nls_iso8859-1 4624 1 (autoclean)
nls_cp437 6128 1 (autoclean)
vfat 26440 1 (autoclean)
fat 77752 0 (autoclean) [vfat]
keybdev 4496 0 (unused)
hid 48200 0 (unused)
usbkbd 7360 0 (unused)
input 9832 0 [keybdev hid usbkbd]
usb-uhci 64184 0 (unused)
usbcore 163544 1 [hid usbkbd usb-uhci]
mptscsih 79568 3
mptbase 78152 3 [mptscsih]

[7.4]
000001f0-000001f7 : ide0
000002f8-000002ff : serial(auto)
000003c0-000003df : vga+
000003f6-000003f6 : ide0
000003f8-000003ff : serial(auto)
00005cc0-00005cdf : usb-uhci
00005ce0-00005cff : usb-uhci

fbfe0000-fbffffff : e1000

[7.5]
00:1d.0 USB Controller: Intel Corporation: Unknown device 24c2 (rev 01)
00:1d.1 USB Controller: Intel Corporation: Unknown device 24c4 (rev 01)
00:1e.0 PCI bridge: Intel Corporation 82820 820 (Camino 2) Chipset PCI
(rev 81) 00:1f.0 ISA bridge: Intel Corporation: Unknown device 24c0 (rev
01)
00:1f.1 IDE interface: Intel Corporation: Unknown device 24cb (rev 01)
01:00.0 Ethernet controller: Intel Corporation: Unknown device 100e (rev
02)
01:01.0 VGA compatible controller: ATI Technologies Inc Rage XL (rev 27)
02:1c.0 PIC: Intel Corporation: Unknown device 1461 (rev 03)
02:1d.0 PCI bridge: Intel Corporation: Unknown device 1460 (rev 03)
02:1e.0 PIC: Intel Corporation: Unknown device 1461 (rev 03)
02:1f.0 PCI bridge: Intel Corporation: Unknown device 1460 (rev 03)
03:1f.0 PCI Hot-plug controller: Intel Corporation: Unknown device 1462
(rev 03)06:01.0 Ethernet controller: Intel Corporation 82557 [Ethernet Pro
100] (rev 0c)06:02.0 SCSI storage controller: LSI Logic / Symbios Logic
(formerly NCR) 53c1030 (rev 03)
06:02.1 SCSI storage controller: LSI Logic / Symbios Logic (formerly NCR)
53c1030 (rev 03)
06:1f.0 PCI Hot-plug controller: Intel Corporation: Unknown device 1462
(rev 03)08:1c.0 PIC: Intel Corporation: Unknown device 1461 (rev 03)
08:1d.0 PCI bridge: Intel Corporation: Unknown device 1460 (rev 03)
08:1e.0 PIC: Intel Corporation: Unknown device 1461 (rev 03)
08:1f.0 PCI bridge: Intel Corporation: Unknown device 1460 (rev 03)
09:1f.0 PCI Hot-plug controller: Intel Corporation: Unknown device 1462
(rev 03)0b:1f.0 PCI Hot-plug controller: Intel Corporation: Unknown device
1462 (rev 03)0e:1c.0 PIC: Intel Corporation: Unknown device 1461 (rev 03)
0e:1d.0 PCI bridge: Intel Corporation: Unknown device 1460 (rev 03)
0e:1e.0 PIC: Intel Corporation: Unknown device 1461 (rev 03)
0e:1f.0 PCI bridge: Intel Corporation: Unknown device 1460 (rev 03)
0f:1f.0 PCI Hot-plug controller: Intel Corporation: Unknown device 1462
(rev 03)
11:1f.0 PCI Hot-plug controller: Intel Corporation: Unknown device 1462
(rev 03)

[7.6]
Attached devices:
Host: scsi0 Channel: 00 Id: 00 Lun: 00
Vendor: MAXTOR Model: ATLAS10K3_18_SCA Rev: B000
Type: Direct-Access ANSI SCSI revision: 03
Host: scsi0 Channel: 00 Id: 06 Lun: 00
Vendor: QLogic Model: GEM359 Rev: 0200
Type: Processor ANSI SCSI revision: 02

[7.7]

[X.]
2.4.18 and 2.4.9 on ia32 do not produce the hang from the c program above.
Changing the values handed to setrlimit() will workaround the hang on ia64
(a small limit will cause the system() call to silently fail, and a larger
[10M] limit will run the system() call successfully).

Please cc: me on responses as I'm not on the list.

-Galen
-- +
Galen Arnold, consulting group--system engineer
National Center for Supercomputing Applications
605 E. Springfield Avenue (217) 244-3473
Champaign, IL 61820 arnoldg@ncsa.uiuc.edu

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