I cannot reproduce this on 2.4.19 (the program runs to completion
without starting a subprocess, because the memory limit is so low).
2.4.16 is ancient and I don't have it on any machine at the moment.
--david
>>>>> On Thu, 12 Sep 2002 15:06:45 -0500 (CDT), Galen Arnold <arnoldg@ncsa.uiuc.edu> said:
Galen> [1.] ia64 linux 2.4.16 , 2.4.19 kernels hang with user code
Galen> calling setrlimit() and system()
Galen> [2.] A short user code can hang ia64 systems, but not ia32
Galen> linux.
Galen> [3.] setrlimit() system() hang
Galen> [4.] 2.4.16 ia64 & 2.4.19 ia64
Galen> [5.] kernel hangs, no output, system goes unresponsive for
Galen> about an hour
Galen> [6.]
Galen> #include <sys/time.h> #include <sys/resource.h> #include
Galen> <unistd.h>
Galen> #define MAX_MEM 1000 int main(void) { struct rlimit
Galen> my_rlimit;
Galen> my_rlimit.rlim_cur= 1024 * MAX_MEM;
Galen> my_rlimit.rlim_max= my_rlimit.rlim_cur;
Galen> setrlimit(RLIMIT_AS, &my_rlimit); system("/bin/sh -c
Galen> 'ulimit -a'"); }
Galen> [7.]
Galen> LANG=en_US ARCH=ia64 SHELL=/bin/bash HOSTTYPE=ia64
Galen> OSTYPE=linux-gnu
Galen> PATH=/usr/kerberos/bin:/usr/local/bin:/bin:/usr/bin:/usr/X11R6/bin
Galen> [7.1] Linux user01 2.4.16 #1 SMP Mon Dec 10 11:03:09 CST 2001
Galen> ia64 unknown
Galen> Gnu C 2.96 Gnu make 3.79.1 binutils 2.10.91.0.2 util-linux
Galen> 2.11f mount 2.11b modutils 2.4.6 e2fsprogs 1.26 reiserfsprogs
Galen> 3.x.0f PPP 2.4.0 Linux C Library 2.2.4 Dynamic linker (ldd)
Galen> 2.2.4 Procps 2.0.7 Net-tools 1.60 Console-tools 0.3.3
Galen> Sh-utils 2.0 Modules Loaded sk98lin e100
Galen> Linux mantis 2.4.19 #2 SMP Wed Sep 11 16:53:31 CDT 2002 ia64
Galen> unknown
Galen> Gnu C 2.96 Gnu make 3.79.1 binutils 2.11.90.0.8 util-linux
Galen> 2.11f mount 2.11g modutils 2.4.13 e2fsprogs 1.23
Galen> reiserfsprogs 3.x.0j PPP 2.4.1 isdn4k-utils 3.1pre1 Linux C
Galen> Library 2.2.4 Dynamic linker (ldd) 2.2.4 Procps 2.0.7
Galen> Net-tools 1.60 Console-tools 0.3.3 Sh-utils 2.0.11 Modules
Galen> Loaded e1000 nls_iso8859-1 nls_cp437 vfat fat keybdev hid
Galen> usbkbd input usb-uhci usbcore mptscsih mptbase
Galen> [7.2] processor : 0 vendor : GenuineIntel arch : IA-64 family
Galen> : Itanium 2 model : 0 revision : 5 archrev : 0 features :
Galen> branchlong cpu number : 41600 cpu regs : 4 cpu MHz :
Galen> 995.901000 itc MHz : 995.901000 BogoMIPS : 1488.97
Galen> [7.2] e1000 133632 1 nls_iso8859-1 4624 1 (autoclean)
Galen> nls_cp437 6128 1 (autoclean) vfat 26440 1 (autoclean) fat
Galen> 77752 0 (autoclean) [vfat] keybdev 4496 0 (unused) hid 48200
Galen> 0 (unused) usbkbd 7360 0 (unused) input 9832 0 [keybdev hid
Galen> usbkbd] usb-uhci 64184 0 (unused) usbcore 163544 1 [hid
Galen> usbkbd usb-uhci] mptscsih 79568 3 mptbase 78152 3 [mptscsih]
Galen> [7.4] 000001f0-000001f7 : ide0 000002f8-000002ff :
Galen> serial(auto) 000003c0-000003df : vga+ 000003f6-000003f6 :
Galen> ide0 000003f8-000003ff : serial(auto) 00005cc0-00005cdf :
Galen> usb-uhci 00005ce0-00005cff : usb-uhci
Galen> fbfe0000-fbffffff : e1000
Galen> [7.5] 00:1d.0 USB Controller: Intel Corporation: Unknown
Galen> device 24c2 (rev 01) 00:1d.1 USB Controller: Intel
Galen> Corporation: Unknown device 24c4 (rev 01) 00:1e.0 PCI bridge:
Galen> Intel Corporation 82820 820 (Camino 2) Chipset PCI (rev 81)
Galen> 00:1f.0 ISA bridge: Intel Corporation: Unknown device 24c0
Galen> (rev 01) 00:1f.1 IDE interface: Intel Corporation: Unknown
Galen> device 24cb (rev 01) 01:00.0 Ethernet controller: Intel
Galen> Corporation: Unknown device 100e (rev 02) 01:01.0 VGA
Galen> compatible controller: ATI Technologies Inc Rage XL (rev 27)
Galen> 02:1c.0 PIC: Intel Corporation: Unknown device 1461 (rev 03)
Galen> 02:1d.0 PCI bridge: Intel Corporation: Unknown device 1460
Galen> (rev 03) 02:1e.0 PIC: Intel Corporation: Unknown device 1461
Galen> (rev 03) 02:1f.0 PCI bridge: Intel Corporation: Unknown
Galen> device 1460 (rev 03) 03:1f.0 PCI Hot-plug controller: Intel
Galen> Corporation: Unknown device 1462 (rev 03)06:01.0 Ethernet
Galen> controller: Intel Corporation 82557 [Ethernet Pro 100] (rev
Galen> 0c)06:02.0 SCSI storage controller: LSI Logic / Symbios Logic
Galen> (formerly NCR) 53c1030 (rev 03) 06:02.1 SCSI storage
Galen> controller: LSI Logic / Symbios Logic (formerly NCR) 53c1030
Galen> (rev 03) 06:1f.0 PCI Hot-plug controller: Intel Corporation:
Galen> Unknown device 1462 (rev 03)08:1c.0 PIC: Intel Corporation:
Galen> Unknown device 1461 (rev 03) 08:1d.0 PCI bridge: Intel
Galen> Corporation: Unknown device 1460 (rev 03) 08:1e.0 PIC: Intel
Galen> Corporation: Unknown device 1461 (rev 03) 08:1f.0 PCI bridge:
Galen> Intel Corporation: Unknown device 1460 (rev 03) 09:1f.0 PCI
Galen> Hot-plug controller: Intel Corporation: Unknown device 1462
Galen> (rev 03)0b:1f.0 PCI Hot-plug controller: Intel Corporation:
Galen> Unknown device 1462 (rev 03)0e:1c.0 PIC: Intel Corporation:
Galen> Unknown device 1461 (rev 03) 0e:1d.0 PCI bridge: Intel
Galen> Corporation: Unknown device 1460 (rev 03) 0e:1e.0 PIC: Intel
Galen> Corporation: Unknown device 1461 (rev 03) 0e:1f.0 PCI bridge:
Galen> Intel Corporation: Unknown device 1460 (rev 03) 0f:1f.0 PCI
Galen> Hot-plug controller: Intel Corporation: Unknown device 1462
Galen> (rev 03) 11:1f.0 PCI Hot-plug controller: Intel Corporation:
Galen> Unknown device 1462 (rev 03)
Galen> [7.6] Attached devices: Host: scsi0 Channel: 00 Id: 00 Lun:
Galen> 00 Vendor: MAXTOR Model: ATLAS10K3_18_SCA Rev: B000 Type:
Galen> Direct-Access ANSI SCSI revision: 03 Host: scsi0 Channel: 00
Galen> Id: 06 Lun: 00 Vendor: QLogic Model: GEM359 Rev: 0200 Type:
Galen> Processor ANSI SCSI revision: 02
Galen> [7.7]
Galen> [X.] 2.4.18 and 2.4.9 on ia32 do not produce the hang from
Galen> the c program above. Changing the values handed to
Galen> setrlimit() will workaround the hang on ia64 (a small limit
Galen> will cause the system() call to silently fail, and a larger
Galen> [10M] limit will run the system() call successfully).
Galen> Please cc: me on responses as I'm not on the list.
Galen> -Galen -- + Galen Arnold, consulting group--system engineer
Galen> National Center for Supercomputing Applications 605
Galen> E. Springfield Avenue (217) 244-3473 Champaign, IL 61820
Galen> arnoldg@ncsa.uiuc.edu
Galen> - To unsubscribe from this list: send the line "unsubscribe
Galen> linux-kernel" in the body of a message to
Galen> majordomo@vger.kernel.org More majordomo info at
Galen> http://vger.kernel.org/majordomo-info.html Please read the
Galen> FAQ at http://www.tux.org/lkml/
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Sun Sep 15 2002 - 22:00:30 EST