7.2-PRERELEASE: make process waiting indefinitely

[Oleg V. Nauman]

Quoting Ronald Klop <ronald-freebsd8 at klop.yi.org>:

> On Tue, 14 Apr 2009 15:04:11 +0200, Oleg V. Nauman
> <oleg at opentransfer.com> wrote:
>
>>
>>  Have experienced today strange issue with my fresh RELENG_7 (   
>> sources from yesterday April 13, userland and kernel in sync ) -   
>> sometimes some processes stop running without any visible reason.   
>> Have seen it twice today during KDE compilation - make process just  
>>  waiting for something while nothing else compiles or some other  
>> way  prevents this process from running ( no SIGSTOP performed, no   
>> Ctrl-S performed on console). Well it possible related to ( or   
>> triggered by ) new ports compilation feature for SMP machines (   
>> most of KDE port marked as MAKE_JOBS_SAFE=yes ) but anyway this   
>> stuck process behavior is strange. kill -SIGCONT not helps, but it   
>> killable ( Ctrl-C helps at least )
>> Well some info related to this process:
>> procstat -t 63472 output:
>>
>>   PID    TID COMM             TDNAME           CPU  PRI STATE   WCHAN
>> 63472 100059 make             -                  1   92 sleep   wait
>>
>> procstat -kk 63472 output:
>>
>>   PID    TID COMM             TDNAME           KSTACK
>> 63472 100059 make             -                mi_switch+0x2c8   
>> sleepq_switch+0xd9 sleepq_catch_signals+0x239 sleepq_wait_sig+0x14   
>> _sleep+0x307 kern_wait+0xa36 wait4+0x3b syscall+0x2b3   
>> Xint0x80_syscall+0x20
>>
>> Some related sysctls output:
>>
>> kern.smp.cpus: 2
>> kern.smp.disabled: 0
>> kern.smp.active: 1
>>
>> uname -msr output:
>> FreeBSD 7.2-PRERELEASE i386
>
> It sounds like
> http://www.mail-archive.com/freebsd-stable@freebsd.org/msg102628.html .
> There are some tips in that mailthread about debugging it.

  Thank you. Looks like it was the same issue.

>
> Ronald.