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* kern/lock.c
* kern/lock.h
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* kern/lock.c
* kern/lock.h
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* kern/lock.c (do_check_simple_locks): New variable.
(check_simple_locks): Make check conditional.
(check_simple_locks_{en,dis}able): New functions.
* kern/lock.h (check_simple_locks_{en,dis}able): New declarations.
* ddb/db_trap.c (db_task_trap): Disable simple lock checks.
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* linux/dev/glue/kmem.c (linux_kmem_init): Drop sanity check.
* linux/dev/init/main.c (alloc_contig_mem, free_contig_mem):
Use the buddy allocator.
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The main impact of the direct physical mapping on the kmem module is the
slab size computation. The page allocator requires the allocation size
to be a power-of-two above the page size since it uses the buddy memory
allocation algorithm.
Custom slab allocation functions are no longer needed since the only
user was the kentry area, which has been removed recently.
The KMEM_CACHE_NOCPUPOOL flag is also no longer needed since CPU pools,
which are allocated from a kmem cache, can now always be allocated out
of the direct physical mapping.
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As it's done for other modules, this separation makes the public interface
easy to identify.
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Instead of using a red-black tree, rely on the VM system to store kmem
specific private data.
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Don't encourage anyone to use non reclaimable pools of resources, it's
a Bad Thing To Do.
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* kern/counters.c: Remove relevant counters.
* kern/counters.h: Likewise.
* kern/thread.c (stack_free_{list,count,limit}): Drop variables.
(stack_next): Remove macro.
(stack_alloc_try): Allocate stack using the slab allocator.
(stack_alloc): Merely call `stack_alloc_try'.
(stack_free): Adopt accordingly.
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* kern/slab.c (kmem_cache_init): Relax alignment restriction.
* kern/thread.c (stack_cache): New variable.
(stack_alloc): Use the slab allocator.
(stack_collect): Adjust accordingly.
(thread_init): Initialize `stack_cache'.
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* ipc/ipc_thread.h (ith_{lock_init,lock,unlock}): Use a general lock.
* kern/task.h (struct task): Use a general lock for `itk_lock_data'.
(itk_{lock_init,lock,unlock}): Use a general lock.
* kern/thread.h (struct thread): Use a general lock for `ith_lock_data'.
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* vm/vm_object.h (struct vm_object): Use a general lock, adapt macros.
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* kern/lock.h (lock_taken): New macro.
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* vm/vm_object.c: Use a general lock to protect the object cache.
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* kern/bootstrap.c (boot_script_exec_cmd): Avoid holding the lock
across the call to `thread_create'.
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* vm/memory_object.c: Use a general lock to protect the default memory
manager.
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* device/if_hdr.h (struct ifnet): Turn the port list locks into
general locks.
(port_list_{lock_init,lock,unlock): New macros.
* device/net_io.c (net_filter, net_set_filter): Use new macros.
* device/subrs.c (if_init_queues): Likewise.
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* device/dev_hdr.h (struct mach_device): Turn lock into a general lock.
(device_lock_init): New macro.
(device_lock, device_unlock): Adapt accordingly.
* device/dev_lookup.c (device_lookup): Use `device_lock_init'.
* device/ds_routines.c (device_open): Adapt accordingly.
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* kern/sched_prim.c (thread_sleep_lock): New function.
* kern/sched_prim.h (thread_sleep_lock): New delcaration.
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* kern/bootstrap.c (bootstrap_create): Move declaration of `n' into
the #ifdef.
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* vm/vm_user.c (vm_wire): Drop unused but set variable `host'.
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* vm/vm_fault.c (vm_fault_page): Enable extra assertions.
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* kern/macros.h: Avoid re-defining macros.
* linux/src/include/linux/compiler-gcc.h: Likewise.
* linux/src/include/linux/compiler.h: Likewise.
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The kernel keeps track of task and thread creation times by saving a
time stamp. Previously, the real-time clock was used for this. When
the real-time clock is changed, however, the reference frame for the
time stamps is lost. This surfaced in Hurd systems reporting
spuriously long uptimes.
Fix this by creating a boot-time clock and use it as reference frame
for the time stamps.
* kern/mach_clock.c (clock_boottime_offset): Create clock by keeping
track of the offset from the real-time.
(clock_boottime_update): New function.
(record_time_stamp): Use the boot-time clock for time stamps.
(read_time_stamp): New function to convert it back to real-time.
(host_set_time): Call `clock_boottime_update'.
* kern/mach_clock.h (record_time_stamp): Amend comment.
(read_time_stamp): New declaration.
* kern/task.c (task_info): Use `read_time_stamp'.
* kern/thread.c (thread_info): Likewise.
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* include/mach/time_value.h (time_value_assert): New macro to assert
that the given value is well-formed.
(time_value_add_usec): Use the new macro.
(time_value_sub_usec): New macro.
(time_value_add): Use `time_value_add_usec'.
(time_value_sub_usec): New macro.
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* kern/lock.h (struct slock, simple_lock_data_empty): Add field
`is_a_simple_lock'.
(simple_lock_assert): New macro that tests for `is_a_simple_lock'.
Use this macro to assert that the arguments to various other macros
are indeed simple locks.
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* configfrag.ac (XPR_DEBUG): Disable tracing system.
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* ipc/ipc_space.h (is_{reference,release}): Use the macro variant.
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* Makerules.am: Make sure the field offsets are updated.
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Previously, killing the thread would fail because of the extra
reference, making task_terminate loop forever.
* kern/bootstrap.c (boot_script_exec_command): Deallocate thread.
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* kern/bootstrap.c (boot_script_free_task): Deallocate task.
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* linux/src/drivers/net/pci-scan.c: Avoid #erroring out.
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A lot of code assumes that printf is re-entrant, e.g. the pagination
code in the debugger, or any use of assert inside the console driver.
* kern/printf.c: Drop the lock serializing calls to `_doprnt'.
(printf_init): Remove function.
* kern/printf.h (printf_init): Remove declaration.
* kern/startup.c (setup_main): Remove call to `printf_init'.
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* kern/lock.c (struct simple_locks_info): Fix type of `ra'.
(simple_lock, simple_lock_try): Use compiler built-in functions to get
return address.
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* kern/bootstrap.c (boot_script_exec_cmd): Add missing unlock.
(user_bootstrap): Likewise.
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* kern/slab.c (host_slab_info): Fix locking.
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This fixes a corruption in the radix trees representing the IPC spaces
when memory was tight.
* ipc/ipc_space.h: Use a general lock to protect IPC spaces.
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