Commit Graph

251 Commits

Author SHA1 Message Date
Julian Elischer
7ab24ea3b9 Introduce a way to make pure kernal threads.
kthread_add() takes the same parameters as the old kthread_create()
plus a pointer to a process structure, and adds a kernel thread
to that process.

kproc_kthread_add() takes the parameters for kthread_add,
plus a process name and a pointer to a pointer to a process instead of just
a pointer, and if the proc * is NULL, it creates the process to the
specifications required, before adding the thread to it.

All other old kthread_xxx() calls return, but act on (struct thread *)
instead of (struct proc *). One reason to change the name is so that
any old kernel modules that are lying around and expect kthread_create()
to make a process will not just accidentally link.

fix top to show  kernel threads by their thread name in -SH mode
add a tdnam formatting option to ps to show thread names.

make all idle threads actual kthreads and put them into their own idled process.
make all interrupt threads kthreads and put them in an interd process
(mainly for aesthetic and accounting reasons)
rename proc 0 to be 'kernel' and it's swapper thread is now 'swapper'

man page fixes to follow.
2007-10-26 08:00:41 +00:00
Jeff Roberson
84a0b303a9 - When using kvm use the new conversion method to derive swtime.
Approved by:	re
2007-09-21 04:11:34 +00:00
Jeff Roberson
b61ce5b0e6 - Move all of the PS_ flags into either p_flag or td_flags.
- p_sflag was mostly protected by PROC_LOCK rather than the PROC_SLOCK or
   previously the sched_lock.  These bugs have existed for some time.
 - Allow swapout to try each thread in a process individually and then
   swapin the whole process if any of these fail.  This allows us to move
   most scheduler related swap flags into td_flags.
 - Keep ki_sflag for backwards compat but change all in source tools to
   use the new and more correct location of P_INMEM.

Reported by:	pho
Reviewed by:	attilio, kib
Approved by:	re (kensmith)
2007-09-17 05:31:39 +00:00
Hidetoshi Shimokawa
d7dc9f7649 Re-enable raw dump format support on i386 and amd64 for /dev/fwmem. 2007-06-15 11:35:11 +00:00
Jeff Roberson
8ef6b1429f - Work-around the already partially broken rusage support in kvm by
completely disabling it until a full solution is agreed upon.

Pointy hat to:	me
2007-06-01 04:14:57 +00:00
Marcel Moolenaar
aea0bb5c9b Add a level of indirection to the kernel PTE table. The old
scheme allowed for 1024 PTE pages, each containing 256 PTEs.
This yielded 2GB of KVA. This is not enough to boot a kernel
on a 16GB box and in general too low for a 64-bit machine.
By adding a level of indirection we now have 1024 2nd-level
directory pages, each capable of supporting 2GB of KVA. This
brings the grand total to 2TB of KVA.
2007-05-19 13:11:27 +00:00
John Baldwin
e8865caffb - Move 'struct swdevt' back into swap_pager.h and expose it to userland.
- Restore support for fetching swap information from crash dumps via
  kvm_get_swapinfo(3) to fix pstat -T/-s on crash dumps.

Reviewed by:	arch@, phk
MFC after:	1 week
2007-02-07 17:43:11 +00:00
Warner Losh
5fa78ac5b8 Per Olivier Houchard, use the proper license for this file. He
bogusly used the kvm_powerpc.c file as a template for the license, but
then either wrote the code himself, or cribbed it from the kvm_i386
file.  The only thing from the kvm_powerpc.c file was the license.
Correct this mistake with his blessing.
2007-01-08 18:25:58 +00:00
Warner Losh
67e405315d Remove the advertising clause. UCB did this some time ago, but these
files were never updated to reflect that.

MFC After: 2 days
2007-01-08 17:35:36 +00:00
Julian Elischer
2d2f0b92c7 remove already commented out code 2006-12-06 06:44:20 +00:00
John Birrell
8460a577a4 Make KSE a kernel option, turned on by default in all GENERIC
kernel configs except sun4v (which doesn't process signals properly
with KSE).

Reviewed by:	davidxu@
2006-10-26 21:42:22 +00:00
Kip Macy
cab68f571e unbreak build for sparc64 etc.
TARGET won't be defined on non subarches

Approved by: rwatson (mentor)
Reviewed by: jmg
2006-10-09 05:12:54 +00:00
Kip Macy
ddd5342909 buildworld fixes for sun4v
not sure why pmap.c is included as it is unchanged

Approved by: rwatson (mentor)
Reviewed by: jmg
2006-10-09 04:58:45 +00:00
Wojciech A. Koszek
6e6dfbf26e Don't forget to set internal error message in kvm_nlist().
Approved by:	cognet (mentor)
2006-09-20 12:09:21 +00:00
Ruslan Ermilov
2d05c776ef Remove alpha-specific stuff. 2006-08-23 12:12:56 +00:00
Yaroslav Tykhiy
42e4359156 Rev. 1.44 of this file didn't introduce a right solution,
but we don't seem to have one yet, so just add an XXX comment on
passing rux_runtime to bintime2timeval() wrongly.

Spotted by:	gcc(1) (warning)
2006-07-25 22:39:57 +00:00
Xin LI
60555db2e2 Include strings.h for bzero() 2006-06-05 08:51:14 +00:00
Peter Wemm
e9ca6fe47e Teach libkvm how to read minidumps. It turns out that minidumps are
far more convenient for libkvm to work with because of the page table
block at the beginning.  As a result, the MD code is smaller.

libkvm will automatically detect old vs mini dumps on i386 and amd64.

libkvm will handle i386 PAE and non-PAE modes.  There is a PAE flag in
the i386 minidump header to signal the width of the entries in the
page table block.

Other convenient values are also present, such as kernbase and the direct
map addresses on amd64.
2006-04-21 04:32:51 +00:00
Christian S.J. Peron
65efc5ee23 Validate that the supplied file is not empty before trying mmap(2) it
and access the pages associated with it.

Submitted by:	Wojciech A. Koszek
PR:		bin/91411
MFC after:	1 week
2006-01-15 20:30:13 +00:00
Peter Wemm
add112ff65 Fix a well duplicated fencepost error that stopped crashdumps being
readable on certain random memory configurations.  If the libkvm consumer
tried to read something that was in the very last pdpe, pde or pte slot,
it would bogusly fail.

This is broken in RELENG_6 too.
2005-10-20 05:41:38 +00:00
Olivier Houchard
9960ac47e9 libkvm bits for arm. 2005-10-03 14:21:14 +00:00
Scott Long
dd3d1a98d5 Fix the alpha build by using the correct argument types for _kvm_kvatop().
Submitted by: marcel
Approved by: re (implicit)
2005-07-02 05:49:29 +00:00
Paul Saab
da2ef70999 Match _kvm_kvatop to it's prototype in kvm_i386.c. This unbreaks
the build.

Approved by:	re
2005-06-30 01:25:21 +00:00
Peter Wemm
e55a0cd805 Support crash dumps > 4GB in size on 32 bit platforms. _kvm_kvatop()
returned an lseek offset in a "u_long *" value, which can't express >4GB
offsets on 32 bit machines (eg: PAE).  Change to "off_t *" for all.

Support ELF crashdumps on i386 and amd64.

Support PAE crashdumps on i386.  This is done by auto-detecting the
presence of the IdlePDPT which means that PAE is active.

I used Marcel's _kvm_pa2off strategy and ELF header reader for ELF support
on amd64.  Paul Saab ported the amd64 changes to i386 and we implemented
the PAE support from there.

Note that gdb6 in the src tree uses whatever libkvm supports.  If you want
to debug an old crash dump, you might want to keep an old libkvm.so handy
and use LD_PRELOAD or the like.  This does not detect the old raw dump
format.

Approved by: re
2005-06-29 22:39:41 +00:00
Peter Wemm
2cfe3fda19 Set ki_tdev to NODEV rather than NULL.
Approved by:  re
2005-06-24 00:37:04 +00:00
Pawel Jakub Dawidek
f8197bf090 Make kvm(3) aware of ki_jid field.
Reviewed by:	gad
MFC after:	3 days
2005-03-20 10:37:56 +00:00
Poul-Henning Kamp
9c4fb6619c Dike out unwarranted reference to si_udev. 2005-03-15 14:26:14 +00:00
Ruslan Ermilov
24a0682c64 Sort sections. 2005-01-20 09:17:07 +00:00
David Schultz
7a62aa8a18 In preparation to remove U areas, don't refer to p_uarea in libkvm.
Reviewed by:	arch@
2004-11-20 02:28:26 +00:00
Christian S.J. Peron
668e800b6f Remove un-needed call to close(2). The fd that close is being
called on is invalid and has no use.

Reviewed by:	smkelly
2004-11-13 14:30:34 +00:00
Christian S.J. Peron
2f5d3f6f6a Document the fact that kvm_getenvv(3) requires procfs to be mounted
on /proc in order to operate correctly.

Reviewed by:	simon@, wes@
2004-11-13 14:26:13 +00:00
Peter Wemm
2bdd560907 Belatedly catch up with the dev_t/cdev changes from a few months back.
Extract the struct cdev pointer and the tty device from inside rather than
incorrectly casting the 'struct cdev *' pointer to a 'dev_t' int.  Not
that this was particularly important since it was only used for reading
vmcore files.
2004-10-11 21:56:27 +00:00
John Baldwin
09ff687c38 - Fix the compile to chase the p_rux changes.
- Add a comment noting that the ru_[us]times values being read aren't
  actually valid and need to be computed from the raw values.

Submitted by:	many (1)
2004-10-06 17:10:56 +00:00
Marcel Moolenaar
0c32530bb7 Redefine a PTE as a 64-bit integral type instead of a struct of
bit-fields. Unify the PTE defines accordingly and update all
uses.
2004-09-23 00:05:20 +00:00
Marcel Moolenaar
6d77d031fd The offset argument to mmap(2) is not a pointer. Use 0 instead of NULL. 2004-09-22 20:26:33 +00:00
Julian Elischer
ed062c8d66 Refactor a bunch of scheduler code to give basically the same behaviour
but with slightly cleaned up interfaces.

The KSE structure has become the same as the "per thread scheduler
private data" structure. In order to not make the diffs too great
one is #defined as the other at this time.

The KSE (or td_sched) structure is  now allocated per thread and has no
allocation code of its own.

Concurrency for a KSEGRP is now kept track of via a simple pair of counters
rather than using KSE structures as tokens.

Since the KSE structure is different in each scheduler, kern_switch.c
is now included at the end of each scheduler. Nothing outside the
scheduler knows the contents of the KSE (aka td_sched) structure.

The fields in the ksegrp structure that are to do with the scheduler's
queueing mechanisms are now moved to the kg_sched structure.
(per ksegrp scheduler private data structure). In other words how the
scheduler queues and keeps track of threads is no-one's business except
the scheduler's. This should allow people to write experimental
schedulers with completely different internal structuring.

A scheduler call sched_set_concurrency(kg, N) has been added that
notifies teh scheduler that no more than N threads from that ksegrp
should be allowed to be on concurrently scheduled. This is also
used to enforce 'fainess' at this time so that a ksegrp with
10000 threads can not swamp a the run queue and force out a process
with 1 thread, since the current code will not set the concurrency above
NCPU, and both schedulers will not allow more than that many
onto the system run queue at a time. Each scheduler should eventualy develop
their own methods to do this now that they are effectively separated.

Rejig libthr's kernel interface to follow the same code paths as
linkse for scope system threads. This has slightly hurt libthr's performance
but I will work to recover as much of it as I can.

Thread exit code has been cleaned up greatly.
exit and exec code now transitions a process back to
'standard non-threaded mode' before taking the next step.
Reviewed by:	scottl, peter
MFC after:	1 week
2004-09-05 02:09:54 +00:00
Warner Losh
9e749cc9c5 Expand the license referenced indirectly inline. 2004-07-31 18:49:53 +00:00
Alexander Kabaev
e1f91dbd18 Remove stale code protected by #ifdef sparc. GCC 3.4.x adds sparc to
predefined symbols on all SPARC platforms and FreeBSD follows the crowd.
2004-07-28 05:43:08 +00:00
Ruslan Ermilov
1a0a934547 Mechanically kill hard sentence breaks. 2004-07-02 23:52:20 +00:00
Ruslan Ermilov
862b46f607 Markup, grammar, punctuation. 2004-07-01 18:20:57 +00:00
Garance A Drosehn
1566329b0f Fix a test of bit-flag "P_SA" by adding parenthesis around the expression.
Submitted by:	Cyrille Lefevre
2004-06-23 21:59:56 +00:00
Garance A Drosehn
b7e7c21adf Replace a call to strncpy() with a call to strlcpy()
Submitted by:	Cyrille Lefevre
2004-06-23 21:31:43 +00:00
Garance A Drosehn
276de18cc9 Fill in the some new fields 'struct kinfo_proc', namely ki_childstime,
ki_childutime, and ki_emul.  Also uses the timeradd() macro to correct
the calculation of ki_childtime.  That will correct the value returned
when ki_childtime.tv_usec > 1,000,000.

This also implements a new KERN_PROC_GID option for kvm_getprocs().
It also implements the KERN_PROC_RGID and KERN_PROC_SESSION options
which were added to sys/kern/kern_proc.c revision 1.203.

PR:		bin/65803  (a very tiny piece of the PR)
Submitted by:	Cyrille Lefevre
2004-06-19 14:08:10 +00:00
Poul-Henning Kamp
f3732fd15b Second half of the dev_t cleanup.
The big lines are:
	NODEV -> NULL
	NOUDEV -> NODEV
	udev_t -> dev_t
	udev2dev() -> findcdev()

Various minor adjustments including handling of userland access to kernel
space struct cdev etc.
2004-06-17 17:16:53 +00:00
Julian Elischer
3010536674 This library has to change whenever the kernel process structure changes. 2004-06-16 00:34:31 +00:00
Stefan Farfeleder
1a5ff9285a Avoid assignments to cast expressions.
Reviewed by:	md5
Approved by:	das (mentor)
2004-06-08 13:08:19 +00:00
Peter Wemm
f2b2912599 Implement crashdump decoding for AMD64 as well, now that I have finally
got a sample to test against.
2004-05-19 18:24:13 +00:00
Olivier Houchard
8cffa1b42d Import libkvm MD file for arm. 2004-05-14 12:24:03 +00:00
Jens Schweikhardt
5aaa432dcc Fix a warning: compare u_long ps_strings to 0 instead of NULL. 2004-03-28 11:50:54 +00:00
Ruslan Ermilov
2769244880 Document that kvm_open(3) also accepts "/dev/null" as a special
"corefile" argument, to access the running system via sysctl(3)
if possible, thus not requring special setgid privileges.
2004-03-26 08:05:39 +00:00