| Summary: | Segfault after update to irqbalance-1.0-1.fc16.i686 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Michael Weidner <micha> | ||||||||||||
| Component: | irqbalance | Assignee: | Neil Horman <nhorman> | ||||||||||||
| Status: | CLOSED ERRATA | QA Contact: | Fedora Extras Quality Assurance <extras-qa> | ||||||||||||
| Severity: | high | Docs Contact: | |||||||||||||
| Priority: | unspecified | ||||||||||||||
| Version: | 16 | CC: | anton, danielbelton, nhorman, stanley.king, tribby21 | ||||||||||||
| Target Milestone: | --- | ||||||||||||||
| Target Release: | --- | ||||||||||||||
| Hardware: | i686 | ||||||||||||||
| OS: | Linux | ||||||||||||||
| Whiteboard: | |||||||||||||||
| Fixed In Version: | irqbalance-1.0-2.fc16 | Doc Type: | Bug Fix | ||||||||||||
| Doc Text: | Story Points: | --- | |||||||||||||
| Clone Of: | Environment: | ||||||||||||||
| Last Closed: | 2011-10-25 03:42:45 UTC | Type: | --- | ||||||||||||
| Regression: | --- | Mount Type: | --- | ||||||||||||
| Documentation: | --- | CRM: | |||||||||||||
| Verified Versions: | Category: | --- | |||||||||||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||||||||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||||||||||
| Attachments: |
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I get the same problem on 2 of my F16 systems here after the update to irqbalance. One is a 32 bit and the other is a 64 bit system. 32 bit system: [ 25.338430] irqbalance[1163]: segfault at 4 ip 41654245 sp bf9213b0 error 6 in libc-2.14.90.so[415a1000+1a7000] [root@tower11 ~]# systemctl status irqbalance.service irqbalance.service - irqbalance daemon Loaded: loaded (/lib/systemd/system/irqbalance.service; enabled) Active: failed since Fri, 14 Oct 2011 08:00:07 -0500; 52min ago CGroup: name=systemd:/system/irqbalance.service On the 64 bit system, sometime it fails with the same error, but usually I get a different message, yet it still loads. [ 13.615122] /usr/sbin/irqbalance[845]: WARNING: MSI interrupts found in /proc/interrupts [ 13.617375] /usr/sbin/irqbalance[845]: But none found in sysfs, you need to update your kernel [ 13.619579] /usr/sbin/irqbalance[845]: Until then, IRQs will be improperly classified [root@tower20 ~]# systemctl status irqbalance.service irqbalance.service - irqbalance daemon Loaded: loaded (/lib/systemd/system/irqbalance.service; enabled) Active: inactive (dead) since Fri, 14 Oct 2011 08:13:08 -0500; 18min ago Process: 841 ExecStart=/usr/sbin/irqbalance $ONESHOT (code=exited, status=0/SUCCESS) Main PID: 845 (code=exited, status=0/SUCCESS) CGroup: name=systemd:/system/irqbalance.service That warning will go away once I'm finished with the kernel backport - its not a big problem, it just means some irqs may get improperly classified as legacy/other interrupts rather than as ethernet interrupts. Can you please post the output of /proc/interrupts /proc/stat and a backtrace of the segfault? Anton, hope you don't mind me grabbing this bug, but I'd like to quash any bugs that I missed in my testing from the re-write. Created attachment 528288 [details]
/proc/stat output
Created attachment 528289 [details]
/proc/interrupts output
Here are the outputs of /proc/stat and /proc/interrupts you requested.
What do I need to do to get a backtrace?
Created attachment 528290 [details]
/proc/interrupts output
Created attachment 528291 [details]
/proc/interrupts output
sorry about that, I attached the wrong output
I got this error, too, with the update to irqbalance-1.0-1.fc16.i686. I'd like to add that although the abort notifier appeared, upon opening the abort tool, no errors were found to report. In /var/log/messages, it seems as if some information was collected for abrtd to work with. I'd be glad to provide more info on that; just let me know what's needed. Only got little time at the moment, here is the backtrace without debug symbols installed, if you need it with debug symbols, give me a message, I will do it later:
(gdb) run
Starting program: /usr/sbin/irqbalance
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/libthread_db.so.1".
Program received signal SIGSEGV, Segmentation fault.
0x00343245 in readdir () from /lib/libc.so.6
(gdb) thread apply all bt full
Thread 1 (Thread 0xb7ff2700 (LWP 10286)):
#0 0x00343245 in readdir () from /lib/libc.so.6
No symbol table info available.
#1 0x0804c530 in ?? ()
No symbol table info available.
#2 0x08049175 in ?? ()
No symbol table info available.
#3 0x002a9673 in __libc_start_main () from /lib/libc.so.6
No symbol table info available.
#4 0x08049429 in ?? ()
No symbol table info available.
Backtrace stopped: Not enough registers or memory available to unwind further
# cat /proc/interrupts
CPU0 CPU1
0: 609891 7580816 IO-APIC-edge timer
1: 0 2 IO-APIC-edge i8042
4: 28751 504818 IO-APIC-edge serial
7: 1 0 IO-APIC-edge
8: 108545 5284077 IO-APIC-edge rtc0
9: 0 0 IO-APIC-fasteoi acpi
12: 0 4 IO-APIC-edge i8042
16: 1 99 IO-APIC-fasteoi ohci_hcd:usb3, ohci_hcd:usb4
17: 90533 251191 IO-APIC-fasteoi ehci_hcd:usb1
18: 94 820 IO-APIC-fasteoi ohci_hcd:usb5, ohci_hcd:usb6, ohci_hcd:usb7, radeon
19: 0 0 IO-APIC-fasteoi ehci_hcd:usb2
20: 0 6 IO-APIC-fasteoi eth1
21: 287488 2318287 IO-APIC-fasteoi
22: 5598 39095 IO-APIC-fasteoi ahci, serial
41: 145015 1378068 PCI-MSI-edge eth0
NMI: 3 3 Non-maskable interrupts
LOC: 5585374 1851918 Local timer interrupts
SPU: 0 0 Spurious interrupts
PMI: 3 3 Performance monitoring interrupts
IWI: 0 0 IRQ work interrupts
RES: 3487662 871222 Rescheduling interrupts
CAL: 7837 6360 Function call interrupts
TLB: 26923 33109 TLB shootdowns
TRM: 0 0 Thermal event interrupts
THR: 0 0 Threshold APIC interrupts
MCE: 0 0 Machine check exceptions
MCP: 296 296 Machine check polls
ERR: 1
MIS: 0
# cat /proc/stat
cpu 121719 20025 124027 17428758 22530 66 2337 0 0 0
cpu0 64754 7509 60800 8714530 11374 4 587 0 0 0
cpu1 56965 12515 63227 8714227 11155 61 1749 0 0 0
intr 30510017 8192356 2 0 0 533895 0 0 1 5394350 0 0 0 4 0 0 0 100 341776 914 0 6 2605775 44695 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1523218 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
ctxt 22137222
btime 1318569360
processes 205082
procs_running 1
procs_blocked 0
softirq 10339580 0 4211962 585546 798082 142852 0 297162 1193431 17239 3093306
Thank you for the backtrace, but it wasn't quite done right. Since irqbalance forks and daemonizes gdb tends to get confused with stack traces. If you could please run that again in gdb, but before running, issue this command: set args --debug that will prevent irqbalance from forking and give you a proper stack trace that we can use to root cause this. Thanks! Here it is: # gdb /usr/sbin/irqbalance GNU gdb (GDB) Fedora (7.3.50.20110722-7.fc16) Copyright (C) 2011 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "i686-redhat-linux-gnu". For bug reporting instructions, please see: <http://www.gnu.org/software/gdb/bugs/>... Reading symbols from /usr/sbin/irqbalance...(no debugging symbols found)...done. Missing separate debuginfos, use: debuginfo-install irqbalance-1.0-1.fc16.i686 (gdb) set args --debug (gdb) run Starting program: /usr/sbin/irqbalance --debug [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/libthread_db.so.1". This machine seems not NUMA capable. Program received signal SIGSEGV, Segmentation fault. 0x00343245 in readdir () from /lib/libc.so.6 (gdb) thread apply all bt full Thread 1 (Thread 0xb7ff2700 (LWP 6517)): #0 0x00343245 in readdir () from /lib/libc.so.6 No symbol table info available. #1 0x0804c530 in ?? () No symbol table info available. #2 0x08049175 in ?? () No symbol table info available. #3 0x002a9673 in __libc_start_main () from /lib/libc.so.6 No symbol table info available. #4 0x08049429 in ?? () No symbol table info available. Backtrace stopped: Not enough registers or memory available to unwind further (gdb) I hope I did this correct [root@tower11 ~]# gdb irqbalance GNU gdb (GDB) Fedora (7.3.50.20110722-9.fc16) Copyright (C) 2011 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "i686-redhat-linux-gnu". For bug reporting instructions, please see: <http://www.gnu.org/software/gdb/bugs/>... Reading symbols from /usr/sbin/irqbalance...Reading symbols from /usr/lib/debug/usr/sbin/irqbalance.debug...done. done. (gdb) set args --debug (gdb) run Starting program: /usr/sbin/irqbalance --debug [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/libthread_db.so.1". This machine seems not NUMA capable. Program received signal SIGSEGV, Segmentation fault. 0x00212245 in __readdir (dirp=0x0) at ../sysdeps/unix/readdir.c:45 45 __libc_lock_lock (dirp->lock); (gdb) bt #0 0x00212245 in __readdir (dirp=0x0) at ../sysdeps/unix/readdir.c:45 #1 0x0804c530 in build_numa_node_list () at numa.c:88 #2 0x08049175 in build_object_tree () at irqbalance.c:137 #3 main (argc=2, argv=0xbffff504) at irqbalance.c:196 (gdb) thread apply all bt full Thread 1 (Thread 0xb7fc9700 (LWP 2358)): #0 0x00212245 in __readdir (dirp=0x0) at ../sysdeps/unix/readdir.c:45 dp = <optimized out> saved_errno = <optimized out> #1 0x0804c530 in build_numa_node_list () at numa.c:88 dir = 0x0 entry = <optimized out> #2 0x08049175 in build_object_tree () at irqbalance.c:137 No locals. #3 main (argc=2, argv=0xbffff504) at irqbalance.c:196 No locals. (gdb) c Continuing. Program terminated with signal SIGSEGV, Segmentation fault. The program no longer exists. (gdb) quit Ok, its possible we're looking at two different problems here, but I can't be 100% sure. In either case I can clearly identify at least one from the backtrace in comment 12. Could everyone please give the test build here a try: http://koji.fedoraproject.org/koji/taskinfo?taskID=3436599 If I get good feedback, I'll commit this upstream and to f16 & rawhide asap. Thanks! irqbalance-1.0-1.test1.fc16.i686.rpm works for me. grand, I'll commit that shortly, thank you! irqbalance-1.0-2.fc16 has been submitted as an update for Fedora 16. https://admin.fedoraproject.org/updates/irqbalance-1.0-2.fc16 Package irqbalance-1.0-2.fc16: * should fix your issue, * was pushed to the Fedora 16 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing irqbalance-1.0-2.fc16' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2011-14501 then log in and leave karma (feedback). Sorry it took me awhile to get back on this. I got a ton of work dumped on me yesterday. But, I have updated to the 1.0.2 version of irqbalance that has been pushed into updates-testing and it fixed the issue I was having as well. With the 1.0.2 version, my irqbalance's segs are no longer faulting. On the other hand, if someone can direct me on how to verify that my IRQs are actually balanced, I'd be happy to check that, too. look in /proc/irq/<N>, where N is an irq number, it should have a mask indicating which cpu(s) it has affinity for. You can also run irqbalance in the foreground with --debug, and that will dump out a periodic map of which cpus/caches/packages/nodes each affected irq is balanced too (as well as the load on each object). Neil, Thanks for the info. The data in /proc/irq/<N> and /proc/interrupts look reasonable, given my machine's light workload. However, I have some bad news. When I run "irqbalance --debug", I get the following: This machine seems not NUMA capable. Could not find numa node for node id 0 Could not find numa node for node id 0 Segmentation fault (core dumped) The command "rpm -q irqbalance" reports that I've got irqbalance-1.0-2.fc16.i686. I get the same thing if I try to run irqbalance from the command line, but it starts up and runs fine when loaded at boot. This is with the updated 1.0.2 version of irqbalance. [root@tower11 /]# gdb irqbalance GNU gdb (GDB) Fedora (7.3.50.20110722-9.fc16) Copyright (C) 2011 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "i686-redhat-linux-gnu". For bug reporting instructions, please see: <http://www.gnu.org/software/gdb/bugs/>... Reading symbols from /usr/sbin/irqbalance...Reading symbols from /usr/lib/debug/usr/sbin/irqbalance.debug...done. done. (gdb) set arg --debug (gdb) run Starting program: /usr/sbin/irqbalance --debug [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/libthread_db.so.1". This machine seems not NUMA capable. Could not find numa node for node id 0 Could not find numa node for node id 0 Program received signal SIGSEGV, Segmentation fault. dump_package (d=0x805b780, data=0xbfffbd8c) at cputree.c:291 291 printf("Package %i: numa_node is %d cpu mask is %s (load %lu)\n", d->number, package_numa_node(d)->number, buffer, (unsigned long)d->load); (gdb) bt #0 dump_package (d=0x805b780, data=0xbfffbd8c) at cputree.c:291 #1 0x0804ad33 in for_each_object (data=0xbfffbd8c, cb= 0x804ac30 <dump_package>, list=<optimized out>) at irqbalance.h:117 #2 dump_tree () at cputree.c:301 #3 0x0804b595 in parse_cpu_tree () at cputree.c:353 #4 0x0804917a in build_object_tree () at irqbalance.c:138 #5 main (argc=2, argv=0xbffff504) at irqbalance.c:196 (gdb) thread apply all bt full Thread 1 (Thread 0xb7fc9700 (LWP 20017)): #0 dump_package (d=0x805b780, data=0xbfffbd8c) at cputree.c:291 buffer = 0xbfffbd8c "00000003" #1 0x0804ad33 in for_each_object (data=0xbfffbd8c, cb= 0x804ac30 <dump_package>, list=<optimized out>) at irqbalance.h:117 entry = <optimized out> next = 0x0 #2 dump_tree () at cputree.c:301 buffer = "00000003", '\000' <repeats 1744 times>"\343, \257\303B\364\377\317B\025\222\274B\001\000\000\000\000\340\377\267'", '\000' <repeats 19 times>, "'\000\000\000\300\t\320B\000\340\377\267\300\t\320B\364\220\274B\300\t\320B\000\340\377\267'", '\000' <repeats 19 times>"\364, \377\317B'\000\000\000\377\377\377\377\300\t\320B\376\254\274B'", '\000' <repeats 23 times>"\300, \t\320B\272\260\274B\300\t\320B\000\340\377\267'", '\000' <repeats 19 times>"\364, \377\317B\024\336\004\b\000\000\000\000\300\t\320B\242\234\274B\300\t\320B\377\377\377\377%", '\000' <repeats 23 times>, "\001", '\000' <repeats 11 times>, "\001", '\000' <repeats 11 times>, "\r\301\271B\364\377\317B\300\t\320B\024\336\004\b\300\t\320BD̹B\230\312\377\277\000\000\000\000\001", '\000' <repeats 31 times>, "\001\000\000\000\023\336\004\b", '\000' <repeats 112 times>, " ", '\000' <repeats 15 times>"\377"... #3 0x0804b595 in parse_cpu_tree () at cputree.c:353 ---Type <return> to continue, or q <return> to quit--- dir = 0x8053300 entry = 0x0 #4 0x0804917a in build_object_tree () at irqbalance.c:138 No locals. #5 main (argc=2, argv=0xbffff504) at irqbalance.c:196 No locals. (gdb) My guess is that it is getting the error when run from the command line due to the fact that irqbalance is already running. root@tower11 /]# systemctl status irqbalance Failed to issue method call: Unit name irqbalance is not valid. [root@tower11 /]# systemctl status irqbalance.service irqbalance.service - irqbalance daemon Loaded: loaded (/lib/systemd/system/irqbalance.service; enabled) Active: active (running) since Tue, 18 Oct 2011 17:19:11 -0500; 1 day and 8h ago Main PID: 1189 (irqbalance) CGroup: name=systemd:/system/irqbalance.service └ 1189 /usr/sbin/irqbalance [root@tower11 /]# That seems like a kernel problem, in that the system has no numa configuration available, but devices in the sysfs tree are reporting that they are local to node 0, rather than to no node (-1). We should probably track that down. Unfortunately, we still shouldn't segfault in such a case. If you open up a new bug for this and assign it to me I'll fix it asap. Neil, while trying to figure out exactly how to phrase a new bug report, I noticed that on the system with the failure, there is no directory /sys/devices/system/node. Could that be causing the difficulty? I looked in that direction by looking at irqbalance 1.0 as retrieved from Google code. If you could point me to a newer version, I'd appreciate it, as there is something else that doesn't seem quite right, but not related to this failure. Thanks. Yes, thats it, indirectly. The problem that you describe will occur if two things happen in sysfs: 1) /sys/devices/system/node doesn't exist 2) the numa_node file for a device in /sys/bus/pci/devices/.../ has the contents '0' rather than '-1' What that tells user space is that numa isn't supported on this system, but there is a device that is local to node 0 (which doesn't exist). The result is irqbalance looks for a data structure internally representing node 0, but doesn't find it, which lets a NULL pointer get assigned to a variable that never expects to be NULL. This is strictly speaking a kernel problem, but I need to harden irqbalance against it (I shouldn't crash regardless). I've fixed it upstream with this: http://code.google.com/p/irqbalance/source/detail?r=effc540808e630d1fad423d653c43737e99cc1b6# but you need to open a new bug so I can backport it. If you want the latest upstream source, you can get it straight from the git tree, instructions found here: http://code.google.com/p/irqbalance/source/checkout I've created Bug report 748070 as requested. I did not have the power to assign it to you, so it shows as assigned to Anton Arapov. irqbalance-1.0-2.fc16 has been pushed to the Fedora 16 stable repository. If problems still persist, please make note of it in this bug report. |
Created attachment 528158 [details] dmesg-output of my machine after a system reboot Description of problem: Cannot run irqbalance after update to irqbalance-1.0-1.fc16.i686 because of a segfault. Version-Release number of selected component (if applicable): irqbalance-1.0-1.fc16.i686 How reproducible: Everytime starting service irqbalance after update to irqbalance-1.0-1.fc16.i686 Steps to Reproduce: 1. Update irqbalance from irqbalance-0.56-4.fc16.i686 to irqbalance-1.0-1.fc16.i686 with yum 2. start irqbalance with "systemctl start irqbalance.service" Actual results: irqbalance causing a segfault systemctl status irqbalance.service output: irqbalance.service - irqbalance daemon Loaded: loaded (/lib/systemd/system/irqbalance.service; enabled) Active: failed since Fri, 14 Oct 2011 07:17:03 +0200; 1h 27min ago Process: 816 ExecStart=/usr/sbin/irqbalance $ONESHOT (code=killed, signal=SEGV) CGroup: name=systemd:/system/irqbalance.service entry in /var/log/messages: irqbalance[816]: segfault at 4 ip 00e20245 sp bfff8870 error 6 in libc-2.14.90.so[d6d000+1a7000] Expected results: irqbalance to start Additional info: I attached a complete dmesg-output of my machine after a system reboot with the segfault present at boot time.