Messages in this thread | | | Date | Tue, 24 Jan 2006 17:49:28 +0000 | From | Chris Lightfoot <> | Subject | kernel freeze on 2.4.32, apparently in cached_lookup |
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I have a Pentium 4 machine running stock kernel 2.4.32 with ext3 on LVM on software RAID-1. HIMEM is enabled and the machine has 3GB of RAM. Various details of the machine and kernel as here:
http://ex-parrot.com/~chris/tmp/20060124/caesious-.config http://ex-parrot.com/~chris/tmp/20060124/caesious-cpuinfo http://ex-parrot.com/~chris/tmp/20060124/caesious-lsmod http://ex-parrot.com/~chris/tmp/20060124/caesious-lspci
Occasionally -- often when running updatedb or another disk-heavy cron job, but sometimes during normal use of the machine -- the machine freezes up almost entirely (mouse pointer stops working, ditto VC switching, no console output if on the text console, SSH sessions freeze, but network packet forwarding and NAT still work). There's no output on the VGA console and the machine doesn't respond to Ctrl-Alt-Sysrq, but does respond to break+... on the serial console. That gives sysrq-p output like this, from the most recent freeze:
SysRq : Show Regs Pid: 30641, comm: updatedb EIP: 0010:d_lookup+63/110 CPU: 0 EFLAGS: 00000287 Tainted: P EAX: c8632710 EBX: c8632700 ECX: 00000012 EDX: 13fe1842 ESI: d373b000 EDI: 0003ffff EBP: ea93bedc DS: 0018 ES: 0018 CR0: 8005003b CR2: 080a4094 CR3: 2965b000 CR4: 000006d0 Call Trace: cached_lookup+11/50 link_path_walk+63b/900 vfs_permission+79/120 path_lookup+1e/30 __user_walk+2b/50 sys_lstat64+17/70 system_call+33/38
-- repeating sysrq+p suggests that the kernel is stuck in d_lookup:
http://ex-parrot.com/~chris/tmp/20060124/caesious-regs-symbols
There's no oops or other message logged.
(I'm running a uniprocessor kernel -- the SMP kernel also freezes under similar circumstances, and I wanted to eliminate the SMP code as a source of problems.)
Does this look like a known problem? If not, what should I do next to track down the problem? In particular, what other information should I try to collect next time it freezes?
(Please cc replies to me if possible....)
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