cvs commit: src/sys/kern subr_trap.c

[John Baldwin]

On 31-Jul-2003 Bruce Evans wrote:
> On Wed, 30 Jul 2003, Peter Wemm wrote:
> 
>> peter       2003/07/30 18:36:24 PDT
>>
>>   FreeBSD src repository
>>
>>   Modified files:
>>     sys/kern             subr_trap.c
>>   Log:
>>   When ktracing context switches, make sure we record involuntary switches.
>>   Otherwise, when we get a evicted from the cpu, there is no record of it.
>>   This is not a default ktrace flag.
> 
> This seems to be missing for many other calls to mi_switch().  Perhaps
> mi_switch() itself should handle it.

Unfortuantely it can't since ktrace uses a mutex internally and ktrcsw()
can't be called with sched_lock held.

-- 

John Baldwin <jhb at FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve!"  -  http://www.FreeBSD.org/