summaryrefslogtreecommitdiffstats
path: root/sys/kern/kern_exit.c
Commit message (Collapse)AuthorAgeFilesLines
* From the submitter:msmith1999-06-071-15/+12
| | | | | | | | | | | | | | | | | - this causes POSIX locking to use the thread group leader (p->p_leader) as the locking thread for all advisory locks. In non-kernel-threaded code p->p_leader == p, so this will have no effect. This results in (more) correct POSIX threaded flock-ing semantics. It also prevents the leader from exiting before any of the children. (so that p->p_leader will never be stale) in exit1(). We have been running this patch for over a month now in our lab under load and at customer sites. Submitted by: John Plevyak <jplevyak@inktomi.com>
* This Implements the mumbled about "Jail" feature.phk1999-04-281-1/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is a seriously beefed up chroot kind of thing. The process is jailed along the same lines as a chroot does it, but with additional tough restrictions imposed on what the superuser can do. For all I know, it is safe to hand over the root bit inside a prison to the customer living in that prison, this is what it was developed for in fact: "real virtual servers". Each prison has an ip number associated with it, which all IP communications will be coerced to use and each prison has its own hostname. Needless to say, you need more RAM this way, but the advantage is that each customer can run their own particular version of apache and not stomp on the toes of their neighbors. It generally does what one would expect, but setting up a jail still takes a little knowledge. A few notes: I have no scripts for setting up a jail, don't ask me for them. The IP number should be an alias on one of the interfaces. mount a /proc in each jail, it will make ps more useable. /proc/<pid>/status tells the hostname of the prison for jailed processes. Quotas are only sensible if you have a mountpoint per prison. There are no privisions for stopping resource-hogging. Some "#ifdef INET" and similar may be missing (send patches!) If somebody wants to take it from here and develop it into more of a "virtual machine" they should be most welcome! Tools, comments, patches & documentation most welcome. Have fun... Sponsored by: http://www.rndassociates.com/ Run for almost a year by: http://www.servetheweb.com/
* Enable vmspace sharing on SMP. Major changes are,luoqi1999-04-281-2/+2
| | | | | | | | | | | | | | | | | - %fs register is added to trapframe and saved/restored upon kernel entry/exit. - Per-cpu pages are no longer mapped at the same virtual address. - Each cpu now has a separate gdt selector table. A new segment selector is added to point to per-cpu pages, per-cpu global variables are now accessed through this new selector (%fs). The selectors in gdt table are rearranged for cache line optimization. - fask_vfork is now on as default for both UP and SMP. - Some aio code cleanup. Reviewed by: Alan Cox <alc@cs.rice.edu> John Dyson <dyson@iquest.net> Julian Elischer <julian@whistel.com> Bruce Evans <bde@zeta.org.au> David Greenman <dg@root.com>
* Well folks, this is it - The second stage of the removal for build supportpeter1999-04-171-2/+2
| | | | for LKM's..
* Fixed runtime accounting. The time since the previous context switchbde1999-03-111-1/+10
| | | | | | | | was discarded on every call to calcru(). Hacking on the `switchtime' global for a related fix in rev.1.38 of kern_resource.c was too fragile and broke when p_switchtime went away. PR: 10402
* Fix thread/process tracking and differentiation for Linux threads emulation.julian1999-03-021-3/+14
| | | | | | Submitted by: Richard Seaman, Jr." <dick@tar.com> Also clean some compiler warnings in surrounding code.
* Hide access to vmspace:vm_pmap with inline function vmspace_pmap(). Thisluoqi1999-02-191-2/+2
| | | | | | | is the preparation step for moving pmap storage out of vmspace proper. Reviewed by: Alan Cox <alc@cs.rice.edu> Matthew Dillion <dillon@apollo.backplane.com>
* Added comments about non-staticization so it doesn't get un-done nextnewton1999-01-311-1/+2
| | | | | | time someone goes on a staticization binge. Suggested by: eivind
* Unstaticized routines which are needed by the svr4 KLD and the streamsnewton1999-01-301-2/+2
| | | | garbage needed to support SysVR4 networking.
* Enable Linux threads support by default.julian1999-01-261-20/+4
| | | | | | | | | This takes the conditionals out of the code that has been tested by various people for a while. ps and friends (libkvm) will need a recompile as some proc structure changes are made. Submitted by: "Richard Seaman, Jr." <dick@tar.com>
* Changes to the LINUX_THREADS support to only allocate extra memory forjulian1999-01-071-17/+26
| | | | | | | | | | | | | | | | | | | | | | shared signal handling when there is shared signal handling being used. This removes the main objection to making the shared signal handling a standard ability in rfork() and friends and 'unconditionalising' this code. (i.e. the allocation of an extra 328 bytes per process). Signal handling information remains in the U area until such a time as it's reference count would be incremented to > 1. At that point a new struct is malloc'd and maintained in KVM so that it can be shared between the processes (threads) using it. A function to check the reference count and move the struct back to the U area when it drops back to 1 is also supplied. Signal information is therefore now swapable for all processes that are not sharing that information with other processes. THis should addres the concerns raised by Garrett and others. Submitted by: "Richard Seaman, Jr." <dick@tar.com>
* Reviewed by: Luoqi Chen, Jordan Hubbardjulian1998-12-191-1/+39
| | | | | | | | | | | | Submitted by: "Richard Seaman, Jr." <lists@tar.com> Obtained from: linux :-) Code to allow Linux Threads to run under FreeBSD. By default not enabled This code is dependent on the conditional COMPAT_LINUX_THREADS (suggested by Garret) This is not yet a 'real' option but will be within some number of hours.
* Installed the second patch attached to kern/7899 with some changes suggestedtruckman1998-11-111-1/+7
| | | | | | | | | | | | | | | | by bde, a few other tweaks to get the patch to apply cleanly again and some improvements to the comments. This change closes some fairly minor security holes associated with F_SETOWN, fixes a few bugs, and removes some limitations that F_SETOWN had on tty devices. For more details, see the description on the PR. Because this patch increases the size of the proc and pgrp structures, it is necessary to re-install the includes and recompile libkvm, the vinum lkm, fstat, gcore, gdb, ipfilter, ps, top, and w. PR: kern/7899 Reviewed by: bde, elvind
* add #include <sys/kernel.h> where it's needed by MALLOC_DEFINE()peter1998-11-101-1/+2
|
* Moved limit frobbing (and the resulting limcopy()) that occurs fordg1998-06-051-7/+1
| | | | | | accounting to the accounting function so that this isn't needlessly done for some process exits. Reviewed by: bde,phk
* Make a kernel version of the timer* functions called timerval* to bephk1998-04-061-2/+2
| | | | | | more consistent. OK'ed by: bde
* VM level code cleanups.dyson1998-01-221-2/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 1) Start using TSM. Struct procs continue to point to upages structure, after being freed. Struct vmspace continues to point to pte object and kva space for kstack. u_map is now superfluous. 2) vm_map's don't need to be reference counted. They always exist either in the kernel or in a vmspace. The vmspaces are managed by reference counts. 3) Remove the "wired" vm_map nonsense. 4) No need to keep a cache of kernel stack kva's. 5) Get rid of strange looking ++var, and change to var++. 6) Change more data structures to use our "zone" allocator. Added struct proc, struct vmspace and struct vnode. This saves a significant amount of kva space and physical memory. Additionally, this enables TSM for the zone managed memory. 7) Keep ioopt disabled for now. 8) Remove the now bogus "single use" map concept. 9) Use generation counts or id's for data structures residing in TSM, where it allows us to avoid unneeded restart overhead during traversals, where blocking might occur. 10) Account better for memory deficits, so the pageout daemon will be able to make enough memory available (experimental.) 11) Fix some vnode locking problems. (From Tor, I think.) 12) Add a check in ufs_lookup, to avoid lots of unneeded calls to bcmp. (experimental.) 13) Significantly shrink, cleanup, and make slightly faster the vm_fault.c code. Use generation counts, get rid of unneded collpase operations, and clean up the cluster code. 14) Make vm_zone more suitable for TSM. This commit is partially as a result of discussions and contributions from other people, including DG, Tor Egge, PHK, and probably others that I have forgotten to attribute (so let me know, if I forgot.) This is not the infamous, final cleanup of the vnode stuff, but a necessary step. Vnode mgmt should be correct, but things might still change, and there is still some missing stuff (like ioopt, and physical backing of non-merged cache files, debugging of layering concepts.)
* Make COMPAT_43 and COMPAT_SUNOS new-style options.eivind1997-12-161-1/+2
|
* Use at_exit() to invoke procfs_exit() instead of calling it directly.sef1997-12-081-12/+1
| | | | | | | | Note that an unload facility should be used to call rm_at_exit() (if procfs is being loaded as an LKM and is subsequently removed), but it was non-obvious how to do this in the VFS framework. Reviewed by: Julian Elischer
* Surround the call to procfs_exit() by #ifdef PROCFS/#endif -- much to mysef1997-12-071-1/+5
| | | | | | surprise, procfs actually is optional, and some people truly do generate kernels without it. Wow. I built a kernel without 'options PROCFS' and it compiled and linked.
* Changes to allow event-based process monitoring and control.sef1997-12-061-1/+11
|
* Avoid passing a `retval' to wait1()bde1997-11-201-13/+10
| | | | | | | Disallow wait options that are not a combination of the standard POSIX options WUNTRACED and WNOHANG, as is required by POSIX. BSD doesn't have any extensions here, but the code was `#ifdef notyet' for some reason.
* Move the "retval" (3rd) parameter from all syscall functions and putphk1997-11-061-10/+7
| | | | | | | | | | | | it in struct proc instead. This fixes a boatload of compiler warning, and removes a lot of cruft from the sources. I have not removed the /*ARGSUSED*/, they will require some looking at. libkvm, ps and other userland struct proc frobbing programs will need recompiled.
* Last major round (Unless Bruce thinks of somthing :-) of malloc changes.phk1997-10-121-3/+3
| | | | | | | | Distribute all but the most fundamental malloc types. This time I also remembered the trick to making things static: Put "static" in front of them. A couple of finer points by: bde
* Distribute and statizice a lot of the malloc M_* types.phk1997-10-111-1/+3
| | | | Substantial input from: bde
* init_main.c subr_autoconf.c:gibbs1997-09-211-2/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add support for "interrupt driven configuration hooks". A component of the kernel can register a hook, most likely during auto-configuration, and receive a callback once interrupt services are available. This callback will occur before the root and dump devices are configured, so the configuration task can affect the selection of those two devices or complete any tasks that need to be performed prior to launching init. System boot is posponed so long as a hook is registered. The hook owner is responsible for removing the hook once their task is complete or the system boot can continue. kern_acct.c kern_clock.c kern_exit.c kern_synch.c kern_time.c: Change the interface and implementation for the kernel callout service. The new implemntaion is based on the work of Adam M. Costello and George Varghese, published in a technical report entitled "Redesigning the BSD Callout and Timer Facilities". The interface used in FreeBSD is a little different than the one outlined in the paper. The new function prototypes are: struct callout_handle timeout(void (*func)(void *), void *arg, int ticks); void untimeout(void (*func)(void *), void *arg, struct callout_handle handle); If a client wishes to remove a timeout, it must store the callout_handle returned by timeout and pass it to untimeout. The new implementation gives 0(1) insert and removal of callouts making this interface scale well even for applications that keep 100s of callouts outstanding. See the updated timeout.9 man page for more details.
* Implement SA_NOCLDWAIT.joerg1997-09-131-2/+16
| | | | | | | | | | | | | | | | | | | | The implementation is done (unlike what i've originally been contemplating) by reparenting kids of processes that have the appropriate bit set to PID 1, and let PID 1 handle the zombie. This is far less problematical than what would seem to be ``doing it right'', for a number of reasons. Of our currently shipping PID-1-intended programs, 50 % fail the above assumption. ;-) (Read this: sysinstall doesn't do it right. This is no problem as long as no program called by sysinstall actually uses SA_NOCLDWAIT.) ToDo: . clarify the correct SA_* flag inheritance, compared to other systems, . decide whether the compat cruft (osigvec(9)) should deal with new system additions or not, . merge OpenBSD's SA_SIGINFO implementation. ;) Reviewed by: bde
* Removed unused #includes.bde1997-09-021-10/+1
|
* Fixed some gratuitous ANSIisms.bde1997-08-261-5/+5
|
* #include <machine/limits.h> explicitly in the few places that it is required.bde1997-08-211-1/+2
|
* Clean up some lint associated with the AIO code.dyson1997-07-171-1/+2
|
* This is an upgrade so that the kernel supports the AIO calls fromdyson1997-07-061-1/+3
| | | | | | | | | | | POSIX.4. Additionally, there is some initial code that supports LIO. This code supports AIO/LIO for all types of file descriptors, with few if any restrictions. There will be a followup very soon that will support significantly more efficient operation for VCHR type files (raw.) This code is also dependent on some kernel features that don't work under SMP yet. After I commit the changes to the kernel to support proper address space sharing on SMP, this code will also work under SMP.
* Modifications to existing files to support the initial AIO/LIO anddyson1997-06-161-1/+32
| | | | kernel based threading support.
* Remove cruft relating to p_selbits and p_selbits_sizephk1997-05-221-7/+1
|
* The biggie: Get rid of the UPAGES from the top of the per-process addresspeter1997-04-071-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | space. (!) Have each process use the kernel stack and pcb in the kvm space. Since the stacks are at a different address, we cannot copy the stack at fork() and allow the child to return up through the function call tree to return to user mode - create a new execution context and have the new process begin executing from cpu_switch() and go to user mode directly. In theory this should speed up fork a bit. Context switch the tss_esp0 pointer in the common tss. This is a lot simpler since than swithching the gdt[GPROC0_SEL].sd.sd_base pointer to each process's tss since the esp0 pointer is a 32 bit pointer, and the sd_base setting is split into three different bit sections at non-aligned boundaries and requires a lot of twiddling to reset. The 8K of memory at the top of the process space is now empty, and unmapped (and unmappable, it's higher than VM_MAXUSER_ADDRESS). Simplity the pmap code to manage process contexts, we no longer have to double map the UPAGES, this simplifies and should measuably speed up fork(). The following parts came from John Dyson: Set PG_G on the UPAGES that are now in kernel context, and invalidate them when swapping them out. Move the upages object (upobj) from the vmspace to the proc structure. Now that the UPAGES (pcb and kernel stack) are out of user space, make rfork(..RFMEM..) do what was intended by sharing the vmspace entirely via reference counting rather than simply inheriting the mappings.
* Don't include <sys/ioctl.h> in the kernel. Stage 1: don't includebde1997-03-241-2/+1
| | | | | it when it is not used. In most cases, the reasons for including it went away when the special ioctl headers became self-sufficient.
* Back out part 1 of the MCFH that changed $Id$ to $FreeBSD$. We are notpeter1997-02-221-1/+1
| | | | ready for it yet.
* This is the kernel Lite/2 commit. There are some requisite userlanddyson1997-02-101-3/+3
| | | | | | | | | | | | | | | changes, so don't expect to be able to run the kernel as-is (very well) without the appropriate Lite/2 userland changes. The system boots and can mount UFS filesystems. Untested: ext2fs, msdosfs, NFS Known problems: Incorrect Berkeley ID strings in some files. Mount_std mounts will not work until the getfsent library routine is changed. Reviewed by: various people Submitted by: Jeffery Hsu <hsu@freebsd.org>
* Copy process resource settings before modifying.davidn1997-01-211-0/+5
| | | | Candidate for 2.2.
* Make the long-awaited change from $Id$ to $FreeBSD$jkh1997-01-141-1/+1
| | | | | | | | This will make a number of things easier in the future, as well as (finally!) avoiding the Id-smashing problem which has plagued developers for so long. Boy, I'm glad we're not using sup anymore. This update would have been insane otherwise.
* Performance optimizations. One of which was meant to go in before thedyson1996-10-121-2/+5
| | | | | | | | previous snap. Specifically, kern_exit and kern_exec now makes a call into the pmap module to do a very fast removal of pages from the address space. Additionally, the pmap module now updates the PG_MAPPED and PG_WRITABLE flags. This is an optional optimization, but helpful on the X86.
* If we have no console device it is possible to bejulian1996-10-041-2/+2
| | | | | | | | | 1/ session leader 2/ Have a console device vnode (/dev/console) 3/ have NULL pointer for a consoel tty struct. fix the only case where the tty struct is referenced without a prior check for existance.
* Don't use __dead in the kernel. It was an obfuscation for gcc >= 2.5bde1996-09-131-3/+3
| | | | and a no-op for gcc >= 2.6.
* Some cleanups to the callout lists recently added.julian1996-08-221-18/+23
| | | | | | | | note that at_shutdown has a new parameter to indicate When during a shutdown the callout should be made. also add a RB_POWEROFF flag to reboot "howto" parameter.. tells the reboot code in our at_shutdown module to turn off the UPS and kill the power. bound to be useful eventually on laptops
* Remove the kernel FD_SETSIZE limit for select().smpatel1996-08-201-1/+7
| | | | | | Make select()'s first argument 'int' not 'u_int'. Reviewed by: bde
* add callout lists for exit() and fork()julian1996-08-191-1/+71
| | | | | | | | | | | | | | | I've been meaning to do this for AGES as I keep having to patch those routines whenever I write a proprietary package or similar.. any module that assigns resources to processes needs to know when these events occur. there are existsing modules that should be modified to take advantage of these.. e.g. SYSV IPC primatives presently have #ifdef entries in exit() this also helps with making LKMs out of such things.. (see the man pages at_exit(9) and at_fork(9))
* Backed out the recent changes/enhancements to the VM code. Thedyson1996-07-301-2/+3
| | | | | | | problem with the 'shell scripts' was found, but there was a 'strange' problem found with a 486 laptop that we could not find. This commit backs the code back to 25-jul, and will be re-entered after the snapshot in smaller (more easily tested) chunks.
* This commit is meant to solve a couple of VM system problems ordyson1996-07-271-3/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | performance issues. 1) The pmap module has had too many inlines, and so the object file is simply bigger than it needs to be. Some common code is also merged into subroutines. 2) Removal of some *evil* PHYS_TO_VM_PAGE macro calls. Unfortunately, a few have needed to be added also. The removal caused the need for more vm_page_lookups. I added lookup hints to minimize the need for the page table lookup operations. 3) Removal of some bogus performance improvements, that mostly made the code more complex (tracking individual page table page updates unnecessarily). Those improvements actually hurt 386 processors perf (not that people who worry about perf use 386 processors anymore :-)). 4) Changed pv queue manipulations/structures to be TAILQ's. 5) The pv queue code has had some performance problems since day one. Some significant scalability issues are resolved by threading the pv entries from the pmap AND the physical address instead of just the physical address. This makes certain pmap operations run much faster. This does not affect most micro-benchmarks, but should help loaded system performance *significantly*. DG helped and came up with most of the solution for this one. 6) Most if not all pmap bit operations follow the pattern: pmap_test_bit(); pmap_clear_bit(); That made for twice the necessary pv list traversal. The pmap interface now supports only pmap_tc_bit type operations: pmap_[test/clear]_modified, pmap_[test/clear]_referenced. Additionally, the modified routine now takes a vm_page_t arg instead of a phys address. This eliminates a PHYS_TO_VM_PAGE operation. 7) Several rewrites of routines that contain redundant code to use common routines, so that there is a greater likelihood of keeping the cache footprint smaller.
* Clean up -Wunused warnings.gpalmer1996-06-121-2/+1
| | | | Reviewed by: bde
* Spell cpu_switch() with an i in a comment.bde1996-04-111-2/+2
|
OpenPOWER on IntegriCloud