Commit Graph

47 Commits

Author SHA1 Message Date
christos 7d930e8572 Use SESSHOLD and SESSRELE consistently.
Add SESSHOLD and SESSRELE to the t_session, so that we don't have dangling
references [inspired by OpenBSD].
2002-04-12 17:02:33 +00:00
thorpej a180cee23b Pool deals fairly well with physical memory shortage, but it doesn't
deal with shortages of the VM maps where the backing pages are mapped
(usually kmem_map).  Try to deal with this:

* Group all information about the backend allocator for a pool in a
  separate structure.  The pool references this structure, rather than
  the individual fields.
* Change the pool_init() API accordingly, and adjust all callers.
* Link all pools using the same backend allocator on a list.
* The backend allocator is responsible for waiting for physical memory
  to become available, but will still fail if it cannot callocate KVA
  space for the pages.  If this happens, carefully drain all pools using
  the same backend allocator, so that some KVA space can be freed.
* Change pool_reclaim() to indicate if it actually succeeded in freeing
  some pages, and use that information to make draining easier and more
  efficient.
* Get rid of PR_URGENT.  There was only one use of it, and it could be
  dealt with by the caller.

From art@openbsd.org.
2002-03-08 20:48:27 +00:00
lukem adc783d537 add RCSIDs 2001-11-12 15:25:01 +00:00
pk 11c1f60120 When freeing a session, remove the reference to it from the associated tty. 2001-02-04 22:32:24 +00:00
ad 642267bcc7 Update for hashinit() change. 2000-11-08 14:28:12 +00:00
thorpej 3a1f5cdbfc If maniuplating a read lock on the proc list, we no longer need
to go to splclock() -- spinlockmgr() handles the interrupt blocking
while holding the interlock for us, now.
2000-08-17 14:37:54 +00:00
sommerfeld 40339b39f9 Reduce use of curproc in several places:
- Change ktrace interface to pass in the current process, rather than
p->p_tracep, since the various ktr* function need curproc anyway.

 - Add curproc as a parameter to mi_switch() since all callers had it
handy anyway.

 - Add a second proc argument for inferior() since callers all had
curproc handy.

Also, miscellaneous cleanups in ktrace:

 - ktrace now always uses file-based, rather than vnode-based I/O
(simplifies, increases type safety); eliminate KTRFLAG_FD & KTRFAC_FD.
Do non-blocking I/O, and yield a finite number of times when receiving
EWOULDBLOCK before giving up.

 - move code duplicated between sys_fktrace and sys_ktrace into ktrace_common.

 - simplify interface to ktrwrite()
2000-05-27 00:40:29 +00:00
thorpej bc3d58f129 __predict_false() the DIAGNOSTIC error checks. 2000-05-08 20:07:37 +00:00
augustss 264f1d27c6 Get rid of register declarations. 2000-03-30 09:27:11 +00:00
thorpej 2ad35b74df After some discussion with Mycroft, change splstatclock() to splclock().
The rule is that you don't get to call scheduler-related functions (e.g.
wakeup()) above the clock interrupt.  Going to statclock unnecessarily
hoses e.g. serial interrupts on the SPARC.
2000-01-22 16:53:50 +00:00
thorpej 2ab34248eb Back out rev 1.36... what was I thinking? Also, update the comment that
led me astray to reflect reality.
2000-01-22 16:32:02 +00:00
thorpej c194b71ab0 Per my comment earlier in the file, we only need to go do splsoftclock()
when write-locking the proclist; splstatclock() is a wee bit overkill.
2000-01-13 21:55:36 +00:00
bouyer 52497e180a Remplace kern.shortcorename sysctl with a more flexible sheme,
core filename format, which allow to change the name of the core dump,
and to relocate it in a directory. Credits to Bill Sommerfeld for giving me
the idea :)
The default core filename format can be changed by options DEFCORENAME and/or
kern.defcorename
Create a new sysctl tree, proc, which holds per-process values (for now
the corename format, and resources limits). Process is designed by its pid
at the second level name. These values are inherited on fork, and the corename
fomat is reset to defcorename on suid/sgid exec.
Create a p_sugid() function, to take appropriate actions on suid/sgid
exec (for now set the P_SUGID flag and reset the per-proc corename).
Adjust dosetrlimit() to allow changing limits of one proc by another, with
credential controls.
1999-09-28 14:47:00 +00:00
thorpej ea8fb3e04a Turn the proclist lock into a read/write spinlock. Update proclist locking
calls to reflect this.  Also, block statclock rather than softclock during
in the proclist locking functions, to address a problem reported on
current-users by Sean Doran.
1999-07-25 06:30:33 +00:00
thorpej 01a8cffe77 Add a read/write lock to the proclists and PID hash table. Use the
write lock when doing PID allocation, and during the process exit path.
Use a read lock every where else, including within schedcpu() (interrupt
context).  Note that holding the write lock implies blocking schedcpu()
from running (blocks softclock).

PID allocation is now MP-safe.

Note this actually fixes a bug on single processor systems that was probably
extremely difficult to tickle; it was possible that schedcpu() would run
off a bad pointer if the right clock interrupt happened to come in the
middle of a LIST_INSERT_HEAD() or LIST_REMOVE() to/from allproc.
1999-07-22 21:08:30 +00:00
thorpej 2715b812d1 Rework the process exit path, in preparation for making process exit
and PID allocation MP-safe.  A new process state is added: SDEAD.  This
state indicates that a process is dead, but not yet a zombie (has not
yet been processed by the process reaper).

SDEAD processes exist on both the zombproc list (via p_list) and deadproc
(via p_hash; the proc has been removed from the pidhash earlier in the exit
path).  When the reaper deals with a process, it changes the state to
SZOMB, so that wait4 can process it.

Add a P_ZOMBIE() macro, which treats a proc in SZOMB or SDEAD as a zombie,
and update various parts of the kernel to reflect the new state.
1999-07-22 18:13:36 +00:00
thorpej 4edbfb00a8 - Add a new proclist, deadproc, which holds dead-but-not-yet-zombie
processes.
- Create a new data structure, the proclist_desc, which contains a
  pointer to a proclist, and eventually, a pointer to the lock for that
  proclist.  Declare a static array of proclist_descs, proclists[],
  consisting of allproc, deadproc, and zombproc.
1998-09-08 23:47:49 +00:00
thorpej 8a1009afd9 Use the pool allocator and the "nointr" pool page allocator for rusage
structures.
1998-09-01 01:02:33 +00:00
thorpej 3f8397855e Use the pool allocator and the "nointr" pool page allocator for pgrp
structures.
1998-09-01 00:08:44 +00:00
thorpej 4dc0e91e12 Use the pool allocator and "nointr" pool page allocator for pcred and
plimit structures.
1998-08-31 23:20:16 +00:00
thorpej 3d5e078fe9 Use the "nointr" pool page allocator. 1998-08-28 21:20:05 +00:00
thorpej f3d7e7e21c Add some braces to make egcs happy (ambiguous else warning). 1998-08-18 06:11:35 +00:00
perry 275d1554aa Abolition of bcopy, ovbcopy, bcmp, and bzero, phase one.
bcopy(x, y, z) ->  memcpy(y, x, z)
ovbcopy(x, y, z) -> memmove(y, x, z)
   bcmp(x, y, z) ->  memcmp(x, y, z)
  bzero(x, y)    ->  memset(x, 0, y)
1998-08-04 04:03:10 +00:00
thorpej 0e28b643e9 Use a pool for proc structures. 1998-08-02 04:41:32 +00:00
fvdl e5bc90f40c Merge with Lite2 + local changes 1998-03-01 02:20:01 +00:00
kleink 59fe905973 Fix variable declarations: register -> register int. 1998-02-14 19:34:12 +00:00
thorpej d2924ae854 Prevent the session ID from disappearing if the session leader exits
(thus causing s_leader to become NULL) by storing the session ID separately
in the session structure.  Export the session ID to userspace in the
eproc structure.

Submitted by Tom Proett <proett@nas.nasa.gov>.
1998-02-14 00:37:26 +00:00
chs f64abc7b4c add flags arg to hashinit(), to pass to malloc(). 1998-02-07 02:44:44 +00:00
gwr 5e15995438 Moved db_kill_proc() and db_show_all_procs() to ddb/db_xxx.c 1997-05-21 19:56:50 +00:00
kleink e7b98401d4 Pull in the declarations of db_expression() and db_error(), used by
db_kill_proc().
1997-05-08 17:22:05 +00:00
gwr 48c524e63a Add db_kill_proc() for DDB (and move db_show_all_procs here so
all the "proc" debugging stuff is here in one place).
1997-05-07 18:48:15 +00:00
christos f443b89c92 backout previous kprintf change 1996-10-13 02:32:29 +00:00
christos 60d201973e printf -> kprintf, sprintf -> ksprintf 1996-10-10 22:46:11 +00:00
christos 09afd77655 More proto fixes 1996-02-09 18:59:18 +00:00
christos 8a5b1b92e2 First pass at prototyping 1996-02-04 02:15:01 +00:00
mycroft 7439778432 Use %p. 1995-03-19 23:44:44 +00:00
cgd d218233b36 various cleanups for -Wall. some inspired by James Jegers. 1994-12-24 15:07:22 +00:00
mycroft 2f710a54ee Convert process, file, and namei lists and hash tables to use queue.h. 1994-08-30 03:04:28 +00:00
cgd cf92afd66e New RCS ID's, take two. they're more aesthecially pleasant, and use 'NetBSD' 1994-06-29 06:29:24 +00:00
mycroft 699bbb84b6 Update to 4.4-Lite fs code. 1994-06-08 11:28:29 +00:00
cgd 540aa31a08 update to lite 1994-05-19 05:57:44 +00:00
cgd 4bbabd8e7a Rename a lot of process flags. 1994-05-04 03:41:12 +00:00
mycroft 21edb9924e Canonicalize all #includes. 1993-12-18 03:59:02 +00:00
andrew 0e6cb953ea ANSIfications - removed all implicit function return types and argument
definitions.  Ensured that all files include "systm.h" to gain access to
general prototypes.  Casts where necessary.
1993-06-27 06:01:27 +00:00
cgd fe1802950b add include of select.h if necessary for protos, or delete if extraneous 1993-05-22 11:40:42 +00:00
cgd 8d6c77881c make kernel select interface be one-stop shopping & clean it all up. 1993-05-18 18:18:40 +00:00
cgd 61f282557f initial import of 386bsd-0.1 sources 1993-03-21 09:45:37 +00:00