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Rev Age Author Path Log message Diff
4679 5625 d 15 h rimsky /branches/sparc/kernel/ Enhancing the way how even distribution of threads over processor cores is achieved.  
3798 5821 d 9 h rimsky /branches/sparc/kernel/ Implemented preemptible trap handler for sun4v for trapping from kernel (not userspace). Not properly tested/debugged yet. HelenOS now reaches the as_install_arch function (where it, of course, fails).  
3343 5972 d 14 h decky /branches/sparc/ add sparc branch  
3181 6031 d 20 h jermar /trunk/kernel/generic/src/ cstyle for kinit.c and scheduler.c  
3062 6049 d 17 h decky /trunk/kernel/generic/src/proc/ proper printf formatting  
2451 6414 d 12 h jermar /trunk/kernel/generic/ JoinMe -> Lingering  
2446 6417 d 16 h jermar /trunk/kernel/generic/ More efficient and simpler task termination.

Based on the assumption, that after its creation, only the task itself can create more threads for itself,
the last thread with userspace context to execute thread_exit() will perform futex and IPC cleanup. When
the task has no threads, it is destroyed. Both the cleanup and destruction is controlled by reference
counting.

As for userspace threads, even though there could be a global garbage collector for joining threads, it is
much simpler if the uinit thread detaches itself before switching to userspace.

task_kill() is now an idempotent operation. It just instructs the threads within a task to exit.

Change in the name of a thread state: Undead -> JoinMe.
 
2310 6442 d 13 h jermar /trunk/kernel/generic/ Cleanup the waitq_wakeup() interface.
Replace numeric constants (i.e. 0)
and boolean constants (i.e. false) with
more readable WAKEUP_FIRST. Also change the
type of the second argument of waitq_wakeup()
to a newly introduced type wakeup_mode_t.

Fix behaviour of waitq_wakeup() in case
that WAKEUP_ALL semantics is required
but no threads are sleeping in the wait
queue. This is a similar fix to that of
Jan Hudecek committed in the RCU branch,
but, IMHO, is more straightforward and
also doesn't eat up previous missed
wakeups.
 
2285 6454 d 20 h jermar /trunk/kernel/generic/src/proc/ Formatting and indentation fixes.  
2216 6472 d 11 h decky /trunk/ make thread ID 64 bit (task ID is 64 bit already)
cleanup thread syscalls
 
2183 6474 d 15 h jermar /trunk/kernel/generic/ Continue to de-oversynchronize the kernel.
- replace as->refcount with an atomic counter; accesses to this
reference counter are not to be done when the as->lock mutex is held;
this gets us rid of mutex_lock_active();

Remove the possibility of a deadlock between TLB shootdown and asidlock.
- get rid of mutex_lock_active() on as->lock
- when locking the asidlock spinlock, always do it conditionally and with
preemption disabled; in the unsuccessful case, enable interrupts and try again
- there should be no deadlock between TLB shootdown and the as->lock mutexes
- PLEASE REVIEW !!!

Add DEADLOCK_PROBE's to places where we have spinlock_trylock() loops.
 
2118 6533 d 16 h decky /trunk/kernel/generic/src/ explicit typecast, fix signed/unsigned comparison  
2089 6541 d 18 h decky /trunk/ huge type system cleanup
remove cyclical type dependencies across multiple header files
many minor coding style fixes
 
2087 6542 d 14 h jermar /trunk/kernel/ Indentaion and formatting changes even Martin will like :-)  
2071 6552 d 11 h jermar /trunk/ (c) versus (C)  
2068 6559 d 18 h jermar /trunk/kernel/ Formatting and indentation fixes.  
2067 6562 d 17 h jermar /trunk/kernel/ More formatting changes.  
2040 6586 d 18 h decky /trunk/kernel/generic/src/proc/ add forgotten btree_remove()  
2030 6587 d 19 h decky /trunk/kernel/ thread CPU cycles accounting  
1888 6677 d 14 h jermar /trunk/ C99 compliant header guards (hopefully) everywhere in the kernel.
Formatting and indentation changes.
Small improvements in sparc64.
 

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