Commit graph

29 commits

Author SHA1 Message Date
Ben Gras
1335d5d700 'proc number' is process slot, 'endpoint' are generation-aware process
instance numbers, encoded and decoded using macros in <minix/endpoint.h>.

proc number -> endpoint migration
  . proc_nr in the interrupt hook is now an endpoint, proc_nr_e.
  . m_source for messages and notifies is now an endpoint, instead of
    proc number.
  . isokendpt() converts an endpoint to a process number, returns
    success (but fails if the process number is out of range, the
    process slot is not a living process, or the given endpoint
    number does not match the endpoint number in the process slot,
    indicating an old process).
  . okendpt() is the same as isokendpt(), but panic()s if the conversion
    fails. This is mainly used for decoding message.m_source endpoints,
    and other endpoint numbers in kernel data structures, which should
    always be correct.
  . if DEBUG_ENABLE_IPC_WARNINGS is enabled, isokendpt() and okendpt()
    get passed the __FILE__ and __LINE__ of the calling lines, and
    print messages about what is wrong with the endpoint number
    (out of range proc, empty proc, or inconsistent endpoint number),
    with the caller, making finding where the conversion failed easy
    without having to include code for every call to print where things
    went wrong. Sometimes this is harmless (wrong arg to a kernel call),
    sometimes it's a fatal internal inconsistency (bogus m_source).
  . some process table fields have been appended an _e to indicate it's
    become and endpoint.
  . process endpoint is stored in p_endpoint, without generation number.
    it turns out the kernel never needs the generation number, except
    when fork()ing, so it's decoded then.
  . kernel calls all take endpoints as arguments, not proc numbers.
    the one exception is sys_fork(), which needs to know in which slot
    to put the child.
2006-03-03 10:00:02 +00:00
Philip Homburg
9bee3f4b08 IOPL, VM, and serial debug output (disabled). 2005-09-30 12:54:59 +00:00
Jorrit Herder
b4d7de6ee1 New makefile (src/tools/Makefile) logic:
- make fresh install: still builds new everything (libraries, services, image)
- make clean image: only builds new boot image (about 5 sec. now!)
2005-08-23 12:53:35 +00:00
Ben Gras
d11b2e4b8c Al's double-blank-line removal request 2005-08-22 15:23:47 +00:00
Jorrit Herder
872687ddfc Scheduling updates to the kernel. Sched() function now is single point for
policy. Actual policy not yet implemented.

PM calculates nice values for processes in boot image.

IS debug dumps improved (Shift+F1-F4).
2005-08-22 15:14:11 +00:00
Jorrit Herder
a01645b788 New scheduling code in kernel. Work in progress.
Round-robin within one priority queue works fine.
Ageing algorithm to be done.
2005-08-19 16:43:28 +00:00
Jorrit Herder
ab7c0a9926 Cleaned up table. Moved policies to table.
Small fixes to do_copy, do_privctl and do_fork.
2005-08-02 15:28:09 +00:00
Jorrit Herder
8866b4d0ef Kernel changes:
- reinstalled priority changing, now in sched() and unready()
- reinstalled check on message buffer in sys_call()
- reinstalled check in send masks in sys_call()
- changed do_fork() to get new privilege structure for SYS_PROCs
- removed some processes from boot image---will be dynamically started later
2005-07-26 12:48:34 +00:00
Jorrit Herder
f0594a9e6d - Fixed comments in various system call handlers. Work in progress on new
sys_privctl() call to dynamically start servers and drivers.

- Shutdown sequence slightly adjusted: called as watchdog timer to let the
  busy sys_abort() call from the PM return first.

- Changed umap_bios() to have more restrictive check: BIOS memory is now
  allowed in BIOS_MEM_BEGIN to END (interrupt vectors) and BASE_MEM_TOP
  to UPPER_MEM_END. Hopefully this keeps QEMU and Bochs happy.
2005-07-21 18:36:40 +00:00
Jorrit Herder
c0718054e9 Various fixes and improvements.
- fixed bug that caused IDLE to panic (irq hook inconsistency);
- kprintf() now accepts multiple arguments; moved to utility.c;
- prepare_shutdown() signals system processes with SIGKSTOP;
- phys_fill() renamed to phys_memset(), argument order changed;
- kmemset() removed in favor of phys_kmemset();
- kstrncpy() removed in favor of phys_copy();
- katoi, kstrncmp replaced by normal library procedure again;
- rm_irq_handler() interface changed (simply pass hook pointer);
2005-07-20 15:25:38 +00:00
Jorrit Herder
198c976f7e System processes can be signaled; signals are transformed in SYS_EVENT message
that passes signal map along. This mechanisms is also used for nonuser signals
like SIGKMESS, SIGKSTOP, SIGKSIG.

Revised comments of many system call handlers. Renamed setpriority to nice.
2005-07-19 12:21:36 +00:00
Jorrit Herder
42ab148155 Reorganized system call library; uses separate file per call now.
New configuration header file to include/ exclude functionality.
Extracted privileged features from struct proc and create new struct priv.
Renamed various system calls for readability.
2005-07-14 15:12:12 +00:00
Ben Gras
3dcb2886ff get/setpriority() and fsync() system calls 2005-07-01 18:01:33 +00:00
Jorrit Herder
c349ef942a Changes scheduling priorities for nice(). 2005-07-01 09:08:41 +00:00
Jorrit Herder
bac6068857 Rewrite of process scheduling:
- current and maximum priority per process;
- quantum size and current ticks left per process;
- max number of full quantums in a row allow
  (otherwise current priority is decremented)
2005-06-30 15:55:19 +00:00
Jorrit Herder
a408699ce0 Cleaned up process table structure: removed p_type, p_pendcount.
Removed stop sequence when MINIX is shut down.
Disabled send mask checks --- to be replaced by proper mechanism.
Fixed bug relating to 'shutdown -x'.
Simplified clock accounting of realtime.
Updated Makefiles for mkdept script.
2005-06-24 16:24:40 +00:00
Jorrit Herder
0e2a7a9730 Kernel cleanup.
Reduced kernel size by 512KB by moving private buffer into cstart() function.
Replaced assertions with erroneous return values. Removed assertions relating
to isuserp(rp), since all processes should become user processes; system
processes are now treated similar to other processes.
2005-06-07 12:34:25 +00:00
Jorrit Herder
0165662cd9 Replaced flagalrm() timers with another technique to check for timeouts.
This allowed removing the p_flagarlm timer from the kernel's process table.
Furthermore, I merged p_syncalrm and p_signalrm into p_alarm_timer to save
even more space. Note that processes can no longer have both a signal and
synchronous alarm timer outstanding as of now.
2005-05-31 14:43:04 +00:00
Jorrit Herder
322ec9ef8b Moved stime, time, times POSIX calls from FS to PM. Removed child time
accounting from kernel (now in PM).  Large amount of files in this commit
is due to system time problems during development.
2005-05-31 09:50:51 +00:00
Jorrit Herder
c2be104821 Improved NOTIFY system: fixed a minor error, ignore pending notifications
on SENDREC system calls. To be done: resource (buffer pool) management;
make it structurally impossible to run out of buffers.
2005-05-27 12:44:14 +00:00
Jorrit Herder
77c3213948 Optimized scheduling code. Old code is still available withing DEAD_CODE
and NEW_SCHED_Q definitions. Some minor problems are being traced at the
moment. This commit is meant to backup my files.
  --- Jorrit
2005-05-26 13:17:57 +00:00
Jorrit Herder
0899f82ab2 Fixed some minor issues with the NOTIFY call. 2005-05-24 14:35:58 +00:00
Ben Gras
168b7f2669 . fixed a recently introduced scheduler (run-queue) bug in proc.c
. a little (optional) debugging code added to proc.c and associated
  data in proc.h
2005-05-24 12:32:34 +00:00
Jorrit Herder
ccd17ecfed New NOTIFY system call! Queued at kernel. Duplicate messages (with same source
and type) are overwritten with newer flags/ arguments. The interface from
within the kernel is lock_notify(). User processes can make a system call with
notify(). NOTIFY fully replaces the old notification mechanism.
2005-05-24 10:06:17 +00:00
Jorrit Herder
307c825515 New NOTIFY trap (IPC call) to send queued notification messages.
The call works. Permission check, restriction of outstanding notifications
to be added. Low level code to make it work from within interrupt handlers
will be added as well.
2005-05-19 14:05:51 +00:00
Jorrit Herder
1cb880b158 Intermediate update---please await next commit. 2005-05-19 09:36:44 +00:00
Jorrit Herder
ac0995259d *** empty log message *** 2005-05-02 14:30:04 +00:00
Jorrit Herder
89ac678b9b *** empty log message *** 2005-04-29 15:36:43 +00:00
Ben Gras
9865aeaa79 Initial revision 2005-04-21 14:53:53 +00:00