Only expose the bulk of sys/proc.h and sys/lwp.h if _KERNEL or _KMEMUSER
is defined.
i386 and amd64 build ok.

Add support for kernel-based code to use a PCU. (for memory to memory
copies or in_cksum or ...)

Don't give a boost to system threads.

exit_lwps, lwp_wait: fix a race condition by re-trying if p_lock was dropped
in a case of process exit. Necessary to re-flag all LWPs for exit, as their
state might have changed or new LWPs spawned.

exit_lwps, lwp_wait: fix a race condition by re-trying if p_lock was dropped
in a case of process exit. Necessary to re-flag all LWPs for exit, as their
state might have changed or new LWPs spawned.

Should fix PR/46168 and PR/46402.

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fork1: fix use-after-free problems. Addresses PR/46128 from Andrew Doran.
Note: PL_PPWAIT should be fully replaced and modificaiton of l_pflag by
other LWP is undesirable, but this is enough for net

fork1: fix use-after-free problems. Addresses PR/46128 from Andrew Doran.
Note: PL_PPWAIT should be fully replaced and modificaiton of l_pflag by
other LWP is undesirable, but this is enough for netbsd-6.

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Add a new resource to limit the number of lwps per user, RLIMIT_NTHR. There
is a global sysctl kern.maxlwp to control this, which is by default 2048.
The first lwp of each process or kernel threads a

Add a new resource to limit the number of lwps per user, RLIMIT_NTHR. There
is a global sysctl kern.maxlwp to control this, which is by default 2048.
The first lwp of each process or kernel threads are not counted against the
limit. To show the current resource usage per user, I added a new sysctl
that dumps the uidinfo structure fields.

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Calling _lwp_create() with a bogus ucontext could trigger a kernel
assertion failure (and thus a crash in DIAGNOSTIC kernels). Independently
discovered by YAMAMOTO Takashi and Joel Sing.

To avoid th

Calling _lwp_create() with a bogus ucontext could trigger a kernel
assertion failure (and thus a crash in DIAGNOSTIC kernels). Independently
discovered by YAMAMOTO Takashi and Joel Sing.

To avoid this, introduce a cpu_mcontext_validate() function and move all
sanity checks from cpu_setmcontext() there. Also untangle the netbsd32
compat mess slightly and add a cpu_mcontext32_validate() cousin there.

Add an exhaustive atf test case, based partly on code from Joel Sing.

Should finally fix the remaining open part of PR kern/43903.

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Remove COMPAT_SA / KERN_SA. Welcome to 6.99.3!
Approved by core@.

fix comment (SRUN->LSRUN, SONPROC->LSONPROC)

change printf gcc attribute to __printflike(), requested by joerg.

add more missing printf attributes.

- make lendpri/changepri similar.
- make common code a subroutine.

Remove LW_AFFINITY flag and fix some bugs affinity mask handling.

Rename slightly misleading KTHREAD_JOINABLE to KTHREAD_MUSTJOIN.

Add kcpuset(9) - a reworked dynamic CPU set implementation for kernel.
Suitable for use during the early boot. MD and other implementations
should be replaced with this interface.

Discussed on: tec

Add kcpuset(9) - a reworked dynamic CPU set implementation for kernel.
Suitable for use during the early boot. MD and other implementations
should be replaced with this interface.

Discussed on: tech-kern@

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Re-implement kthread_join(9), so that it actually works (hi haad@).

Limit sys/pcu.h inclusion within _KERNEL scope, plus _KMEMUSER.

Nuke all threads belonging to a process calling exec before allowing
the exec handshake to return.

In addition to being The Right Thing To Do, fixes some nasty
conditions for CLOEXEC fd's (or at lea

Nuke all threads belonging to a process calling exec before allowing
the exec handshake to return.

In addition to being The Right Thing To Do, fixes some nasty
conditions for CLOEXEC fd's (or at least does so in theory, I
couldn't create any problems although I tried).

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Borrow the lwpctl data area from the parent for the vfork() child.
Otherwise the child will incorrectly see it is not running on any
CPU. Among other things, this fixes crashes from having
LD_PRELOA

Borrow the lwpctl data area from the parent for the vfork() child.
Otherwise the child will incorrectly see it is not running on any
CPU. Among other things, this fixes crashes from having
LD_PRELOAD=libpthread.so set in the env.

reviewed by tech-kern

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Default PCU_UNIT_COUNT to 0. If 0, don't compile the contents of subr_pcu.c
and don't include the pcu related members into struct lwp.

Move lwp_getpcb() into a (_KERNEL || _KMEMUSER) ifdef. Unbreaks crash(8).

Need pcu.h unconditionally.

don't include things twice.

Move lwp_getpcb to the area with the rest of the _KERNEL function declarations.

Add PCU (Per-CPU Unit) - an interface to manage synchronization of any
per CPU context tied with an LWP. Main use - lazy FPU handling on SMP.

Requested by matt@, will be used on mips64. Note: impl

Add PCU (Per-CPU Unit) - an interface to manage synchronization of any
per CPU context tied with an LWP. Main use - lazy FPU handling on SMP.

Requested by matt@, will be used on mips64. Note: implementation will
be improved to use IPIs before adopting on x86. OK ad@.

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