CVS log for src/sys/sys/workqueue.h

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sys/workqueue.h: Need sys/types.h for pri_t.

New workqueue flag WQ_FPU.

Arranges kthread_fpu_enter/exit around calls to the worker.  Saves
cost over explicit calls to kthread_fpu_enter/exit in the worker by
only doing it once, since there's often a high cost to flushing the
icache and zeroing the fpu registers.

As proposed on tech-kern:
https://mail-index.netbsd.org/tech-kern/2020/06/20/msg026524.html

Pull up following revision(s) (requested by ozaki-r in ticket #497):
	tests/rump/rumpkern/Makefile: revision 1.16
	tests/rump/kernspace/Makefile: revision 1.6
	tests/rump/kernspace/workqueue.c: revision 1.1
	tests/rump/kernspace/workqueue.c: revision 1.2
	tests/rump/kernspace/workqueue.c: revision 1.3
	tests/rump/kernspace/workqueue.c: revision 1.4
	tests/rump/kernspace/workqueue.c: revision 1.5
	tests/rump/kernspace/workqueue.c: revision 1.6
	tests/rump/rumpkern/t_workqueue.c: revision 1.1
	sys/sys/workqueue.h: revision 1.10
	tests/rump/rumpkern/t_workqueue.c: revision 1.2
	tests/rump/kernspace/kernspace.h: revision 1.5
	tests/rump/kernspace/kernspace.h: revision 1.6
	sys/net/if_bridge.c: revision 1.147
	distrib/sets/lists/debug/mi: revision 1.225
	sys/kern/subr_workqueue.c: revision 1.34
	share/man/man9/workqueue.9: revision 1.12
	sys/net/if_spppsubr.c: revision 1.178
	distrib/sets/lists/tests/mi: revision 1.763
Add simple test for workqueue(9)
Add declaration. build fix
sorry, I forgot to commit this file.
Tweak use of cv_timedwait
- Handle its return value
- Specify more appropriate time-out periods (2 ticks is too short)
Fix a race condition on taking the mutex
The workqueue worker can take the mutex before the tester tries to take it after
calling workqueue_enqueue. If it happens, the worker calls cv_broadcast before
the tester calls cv_timedwait and the tester will wait until the cv timed out
Take the mutex before calling workqueue_enqueue so that the tester surely calls
cv_timedwait before the worker calls cv_broadcast.
The fix stabilizes the test, t_workqueue/workqueue1.
Add workqueue_wait that waits for a specific work to finish
The caller must ensure that no new work is enqueued before calling
workqueue_wait. Note that Note that if the workqueue is WQ_PERCPU, the caller
can enqueue a new work to another queue other than the waiting queue.
Discussed on tech-kern@
Ensure the timer isn't running by using workqueue_wait
Functionalize some routines to add new tests easily (NFC)
Add a test case for workqueue_wait
Fix build

Add workqueue_wait that waits for a specific work to finish

The caller must ensure that no new work is enqueued before calling
workqueue_wait. Note that Note that if the workqueue is WQ_PERCPU, the caller
can enqueue a new work to another queue other than the waiting queue.

Discussed on tech-kern@

sync with HEAD

sync with head.

Sync with HEAD.

Follow the merge of pmap.c on i386 and amd64 and move
pmap_init_tmp_pgtbl into arch/x86/x86/pmap.c. Modify the ACPI wakeup
code to restore CR4 before jumping back into kernel space as the large
page option might cover that.

Sync with HEAD.

Sync with head.

machine/{bus,cpu,intr}.h -> sys/{bus,cpu,intr}.h

sync with head.

Sync with HEAD.

Sync with HEAD.

hide internals of struct work.

file workqueue.h was added on branch matt-mips64 on 2007-07-20 12:43:26 +0000

hide internals of struct work.

Sync with head.

Sync with head.

Make MP parts friendly with various ports (especially UP):
 - #ifdef code parts, which uses CPU_INFO_FOREACH/CPU_INFO_ITERATOR
 - use ci_cpuid only in MP case
 - include machine/cpu.h

Implementation of per-CPU work-queues support for workqueue(9) interface.
WQ_PERCPU flag for workqueue and additional argument for workqueue_enqueue()
to assign a CPU might be used. Notes:
 - For now, the list is used for workqueue_queue, which is non-optimal,
   and will be changed with array, where index would be CPU ID.
 - The data structures should be changed to be cache-friendly.

Reviewed by: <yamt>, <tech-kern>

Sync with head.

Merge some of the less invasive changes from the vmlocking branch:

- kthread, callout, devsw API changes
- select()/poll() improvements
- miscellaneous MT safety improvements

Allow workqueues to be marked as MP safe.

- sync with head.
- move sched_changepri back to kern_synch.c as it doesn't know PPQ anymore.

typedef pri_t and use it instead of int and u_char.

sync with head.

Sync with head.

add workqueue_destroy().

sync with head.

Sync with head.

file workqueue.h was added on branch yamt-lazymbuf on 2006-06-21 15:12:04 +0000

Make sure that multiple header inclusion is done, it uses consistent names,
and it is around the whole code of the file, not parts of it.

Sync with HEAD. Here we go again...

sync with head.

file workqueue.h was added on branch ktrace-lwp on 2005-11-10 14:12:13 +0000

file workqueue.h was added on branch yamt-vop on 2005-11-02 11:58:11 +0000

add a simple "do it in thread context" framework.