Messages in this thread Patch in this message | | | Date | Mon, 1 Mar 1999 10:30:00 +0100 (MET) | From | Heiko Ulbrich Inf/ET <> | Subject | bug: kernel timer added twice.... |
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bug: kernel timer added twice at c0185a78
Hi there, just caught some bug? Here's what happened: Mounting a CDROM caused bug: kernel timer added twice at c0185a78 This only happened with tray opened. If i mount the CDROM, after closed the tray, nothing happened. Ugly thing is: PID TTY STAT TIME COMMAND ... 3254 ? D < 0:00 mount /dev/cdrom 3743 ? D < 0:00 mount /dev/cdrom 4826 ? D < 0:00 mount /dev/cdrom 5355 ? D < 0:00 mount /dev/cdrom Unkillable. Someone got some util to get it out of mem ?
In my eyes, the message appears from : (patch-2.2.2) diff -u --recursive --new-file v2.2.1/linux/kernel/sched.c linux/kernel/sched.c --- v2.2.1/linux/kernel/sched.c Wed Jan 20 23:14:07 1999 +++ linux/kernel/sched.c Thu Feb 18 23:56:05 1999 @@ -36,6 +36,7 @@ #include <asm/uaccess.h> #include <asm/pgtable.h> #include <asm/mmu_context.h> +#include <asm/semaphore-helper.h>
#include <linux/timex.h>
@@ -463,8 +464,17 @@ unsigned long flags;
spin_lock_irqsave(&timerlist_lock, flags); + if (timer->prev) + goto bug; <----- internal_add_timer(timer); +out: spin_unlock_irqrestore(&timerlist_lock, flags); + return; + +bug: + printk("bug: kernel timer added twice at %p.\n", <----- + __builtin_return_address(0)); <----- + goto out; }
static inline int detach_timer(struct timer_list *timer) @@ -639,6 +649,8 @@ struct task_struct * prev, * next; int this_cpu;
+ run_task_queue(&tq_scheduler); + ..............and so on.
grep-ped the entire source for "timer added"-> the patched sched.c is the only place.
What happens?
Some System-information : -Linux version 2.2.2 (root@thunder.malz-wg.de) (gcc version pgcc-2.91.60 19981201 (egcs-1.1.1 release)) #19 Sam Feb 27 10:44:27 GMT 1999 -Kernel modules 2.1.121 Gnu C pgcc-2.91.60 Binutils 2.9.1.0.15 Linux C Library 2.0.7 Dynamic linker ldd (GNU libc) 2.0.7 Linux C++ Library 2.8.0 Procps 1.2.9 Mount 2.8a Net-tools (1998-06-29) Kbd 0.96 Sh-utils 1.16 -/proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 5 model name : Pentium II (Deschutes) stepping : 2 cpu MHz : 450.479478 cache size : 512 KB fdiv_bug : no hlt_bug : no sep_bug : no f00f_bug : no fpu : yes fpu_exception : yes cpuid level : 2 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov pat pse36 mmx osfxsr bogomips : 447.28 -/proc/modules sr_mod 16156 1 (autoclean) cdrom 13432 0 (autoclean) [sr_mod] isofs 18168 1 (autoclean) nls_iso8859-1 2052 1 (autoclean) i2c-proc 2828 0 i2c-dev 2108 0 (unused) w83781d 8404 0 sensors 4508 0 [w83781d] piix4 2824 0 (unused) smbus 1820 0 [w83781d piix4] isa 1400 0 (unused) i2c-core 4144 0 [i2c-proc i2c-dev w83781d sensors piix4 smbus isa] serial 18516 1 (autoclean) ne2k-pci 3876 1 (autoclean) 8390 6180 0 (autoclean) [ne2k-pci] ide-disk 5768 1 (autoclean) ide-probe 6724 0 (autoclean) ide-mod 39032 1 (autoclean) [ide-disk ide-probe] opl3 13704 1 sb 34964 1 uart401 6192 1 [sb] sound 62508 0 [opl3 sb uart401] soundcore 2340 6 [sb sound] -/proc/scsi/scsi Host: scsi0 Channel: 00 Id: 00 Lun: 00 Vendor: IBM Model: DGHS09U Rev: 0350 Type: Direct-Access ANSI SCSI revision: 02 Host: scsi0 Channel: 00 Id: 03 Lun: 00 Vendor: PLEXTOR Model: CD-ROM PX-32TS Rev: 1.03 Type: CD-ROM ANSI SCSI revision: 02
Maybe someone can answer this question, or tell me the ac-patch, that fixes it ;-)
That`s all, folks! Heiko
+-----------------------------------+ | Mail: | | h_ulbric@informatik.uni-kl.de | | ulbrich@student.uni-kl.de | +-----------------------------------+ WEB: http://www.rhrk.uni-kl.de/~ulbrich __ _ / / (_) __ __ ____ __ / /__ / // _ \/ // /\ \/ / . . . t h e c h o i c e o f a /____//_//_//_/\_,_/ /_/\_\ G N U g e n e r a t i o n Microsoft gives you Windows, UNIX gives you the whole house The gates in my computer are AND, OR and NOT; they are not Bill.
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