into modules. By and large this commit:
- shuffles header files and ifdefs
- splits code out where necessary to be modular
- adds module glue for each of the components
- adds/replaces hooks for things that can be installed at runtime
going through a syscall trap. These are currently useful for rumps.
As all the standard syscalls are not compiled into librump, mark
relevant ones with RUMP in syscalls.master. To do e.g. a mkdir
"system call" from a rump, one would call
rump_sys_mkdir("/dir", mode, &eval);
where the last value represents something to store errno into.
- revert struct sched_param changes to restore ABI.
- instead, add 'policy' arguments to _sched_{get,set}param syscalls.
(this is an API/ABI change.)
- correct kauth_authorize_process arguments.
while i'm here,
- don't bother to kmem_alloc for 4-byte structure.
Add schedctl(8) - a program to control scheduling of processes and threads.
Notes:
- This is supported only by SCHED_M2;
- Migration of LWP mechanism will be revisited;
Proposed on: <tech-kern>. Reviewed by: <ad>.
int foo(struct lwp *l, void *v, register_t *retval)
to:
int foo(struct lwp *l, const struct foo_args *uap, register_t *retval)
Fixup compat code to not write into 'uap' and (in some cases) to actually
pass a correctly formatted 'uap' structure with the right name to the
next routine.
A few 'compat' routines that just call standard ones have been deleted.
All the 'compat' code compiles (along with the kernels required to test
build it).
98% done by automated scripts.
1 microsecond into the future, the thread could enter an untimed sleep.
- Change the signature of _lwp_park() to accept an lwpid_t and second
hint pointer, but do so in a way that remains compatible with older
pthread libraries. This can be used to wake another thread before the
calling thread goes asleep, saving at least one syscall + involuntary
context switch. This turns out to be a fairly large win on the condvar
benchmarks that I have tried.
- Mark some more syscalls MP safe.
