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Rev Age Author Path Log message Diff
4452 5478 d 23 h decky /trunk/kernel/generic/ send notification also during task creation
(the intention is to be able to pair task creation and destruction to avoid missed waits)
 
4448 5479 d 11 h decky /trunk/kernel/generic/ add very simple implementation of task destruction notification
(which will be later used for waiting on a task)
 
4267 5533 d 6 h svoboda /trunk/kernel/ str_ncpy() vs str_cpy(). TODO: The same in userspace.  
4220 5539 d 21 h decky /trunk/kernel/ update for string changes  
4013 5571 d 6 h svoboda /trunk/kernel/generic/ Didn't need strrcpy() afterall. Also remove strcpy() since strncpy() is better.  
4011 5571 d 8 h svoboda /trunk/kernel/ String functions should be declared in string.h (and implemented in string.c) in the kernel.  
3988 5572 d 7 h svoboda /trunk/kernel/generic/src/proc/ Fix misaligned columns (whoops).  
3987 5572 d 8 h svoboda /trunk/kernel/ Read command line for multiboot modules on ia32 and copy it to task name. Other arches will need to initialize task names in the init structure to an empty string.  
3983 5572 d 14 h svoboda /trunk/ task_set_name() syscall so that we can have names (for userspace-loaded) tasks again.  
3908 5585 d 10 h decky /trunk/ overhaul pareas: use one single physical area for the physical address space not belonging to physical memory  
3620 5670 d 18 h svoboda /trunk/kernel/generic/ Move stuff related to kbox to a separate struct.  
3566 5685 d 19 h svoboda /trunk/ Set meaningful names for loaded programs. Now 'tasks' kconsole command is much less obscure.  
3438 5737 d 17 h svoboda /trunk/ Merge syscall tracer (trace) and relevant part of udebug interface from tracing to trunk.  
3359 5761 d 18 h jermar /trunk/kernel/generic/src/proc/ Improve comments in task.c  
3222 5808 d 13 h svoboda /trunk/ Merge program-loader related stuff from dynload branch to trunk. (huge)  
3186 5823 d 10 h jermar /trunk/kernel/ Support for active mutexes. Active mutexes implement busy waiting, pretty much
in the same way as spinlocks, but can be passed to condition variables, which is
the motivation for this enhancement.
 
3137 5832 d 17 h jermar /trunk/kernel/generic/src/proc/ Maintain cache coherence after sys_task_spawn() copies ELF image from user space.  
3063 5843 d 14 h decky /trunk/kernel/generic/src/proc/ support for SYS_SPAWN syscall
proper printf formatting
change the way init tasks are created
 
2802 5902 d 18 h jermar /trunk/kernel/generic/ Fix initialization of answerbox->task in ipc_answerbox_init.
Contributed by Jiri Svoboda.
 
2745 5940 d 17 h decky /trunk/ code cleanup (mostly signed/unsigned)
allow extra compiler warnings
 
2712 5966 d 15 h decky /trunk/kernel/ prettyprint output  
2632 6028 d 4 h decky /trunk/kernel/generic/src/proc/ try to kill the tasks fewer times by introducing a delay in iterations  
2504 6153 d 10 h jermar /trunk/kernel/generic/ Give the AVL tree walkers the possibility to take an argument.
Each walker is now supposed to return a bool value to support walk termination.

Switch over from the tasks_btree B+tree to tasks_tree AVL tree.
This makes the fix for ticket #48 complete.
 
2446 6211 d 13 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.
 
2436 6213 d 9 h jermar /trunk/ Fix two memory leaks.

In kernel, kernel_uarg structure needs to be deallocated when a thread
with userspace context is destroyed.

In userspace, the return value of the SYS_THREAD_CREATE must be checked
for error conditions and in case of error, uarg and stack must be freed
up.
 
2227 6264 d 23 h decky /trunk/kernel/ start shutdown infrastructure  
2216 6266 d 9 h decky /trunk/ make thread ID 64 bit (task ID is 64 bit already)
cleanup thread syscalls
 
2183 6268 d 13 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 6327 d 14 h decky /trunk/kernel/generic/src/ explicit typecast, fix signed/unsigned comparison  
2109 6328 d 17 h jermar /trunk/kernel/generic/ Revert thread_interrupt_sleep() to waitq_interrupt_sleep().
I'd prefer that this, IMO, waitq related stuff stays together.
 
2089 6335 d 15 h decky /trunk/ huge type system cleanup
remove cyclical type dependencies across multiple header files
many minor coding style fixes
 
2087 6336 d 11 h jermar /trunk/kernel/ Indentaion and formatting changes even Martin will like :-)  
2071 6346 d 8 h jermar /trunk/ (c) versus (C)  
2050 6375 d 19 h decky /trunk/kernel/ benchmarking with statistics (initial)  
2048 6378 d 10 h jermar /trunk/ Formatting and indentation changes.  
2042 6380 d 12 h decky /trunk/kernel/ introduce uncounted threads, whose accounting doesn't affect accumulated task accounting
run tests in kconsole thread again
 
2041 6380 d 13 h decky /trunk/kernel/generic/src/proc/ revert 2040  
2040 6380 d 15 h decky /trunk/kernel/generic/src/proc/ add forgotten btree_remove()  
2039 6380 d 16 h decky /trunk/kernel/generic/ accumulate task accounting, run tests as separate kernel task  
2035 6381 d 14 h decky /trunk/kernel/generic/src/ more fancy kconsole output