Halil Demirezen wrote:
Hello,
First of all, I am not sure if this is the correct mail list with posting this mail. I apologize for that.. Second, I may seem to have little C knowledge, though I am using C for about 5 years and plus.
Let's start with the question. I am digging the FreeBSD-5.3 kernel codes.
Watson's Cross Reference is really helpful. In the schedcpu(void) function
there is an assignment like "ke = td->td_kse;" on line 438 (see: http://fxr.watson.org/fxr/source/kern/sched_4bsd.c?v=RELENG53#L438";).
When I look at the thread structure at sys/proc.h, I could not see such an
entry td_kse in the "thread" structure. How has this structure been extended or this entry added to the thread structure?
Although the kernel codes seem to be simply understandable, there still lies some difficulties to understand for an average C programmer: magic stuff done by professionals. :)
Anyway, any help really will be appreciated...
originally there were 2 structures
the kse and the td_sched
They were merged but the code was kept teh same so that edits would be not 'flooded' in
the diffs.
places that used to refer to ke->ke_xxx still do and places that used to refer to td->td_sched->tds_xxx still do
but they are now the same thing.
Thanks.
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