[SCM] GNU Mach branch, master, updated. v1.6-31-g5e9f6f5

[Richard Braun]

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- Log -----------------------------------------------------------------
commit 5e9f6f52451ccb768d875370bf1769b27ff0041c
Author: Richard Braun <address@hidden>
Date:   Tue Feb 2 03:30:34 2016 +0100

    Stack the slab allocator directly on top of the physical allocator
    
    In order to increase the amount of memory available for kernel objects,
    without reducing the amount of memory available for user processes,
    a new allocation strategy is introduced in this change.
    
    Instead of allocating kernel objects out of kernel virtual memory,
    the slab allocator directly uses the direct mapping of physical
    memory as its backend. This largely increases the kernel heap, and
    removes the need for address translation updates.
    
    In order to allow this strategy, an assumption made by the interrupt
    code had to be removed. In addition, kernel stacks are now also
    allocated directly from the physical allocator.
    
    * i386/i386/db_trace.c: Include i386at/model_dep.h
    (db_i386_reg_value): Update stack check.
    * i386/i386/locore.S (trap_from_kernel, all_intrs,
    int_from_intstack): Update interrupt handling.
    * i386/i386at/model_dep.c: Include kern/macros.h.
    (int_stack, int_stack_base): New variables.
    (int_stack_high): Remove variable.
    (i386at_init): Update interrupt stack initialization.
    * i386/i386at/model_dep.h: Include i386/vm_param.h.
    (int_stack_top, int_stack_base): New extern declarations.
    (ON_INT_STACK): New macro.
    * kern/slab.c: Include vm/vm_page.h
    (KMEM_CF_NO_CPU_POOL, KMEM_CF_NO_RECLAIM): Remove macros.
    (kmem_pagealloc, kmem_pagefree, kalloc_pagealloc, kalloc_pagefree): Remove
    functions.
    (kmem_slab_create): Allocate slab pages directly from the physical 
allocator.
    (kmem_slab_destroy): Release slab pages directly to the physical allocator.
    (kmem_cache_compute_sizes): Update the slab size computation algorithm to
    return a power-of-two suitable for the physical allocator.
    (kmem_cache_init): Remove custom allocation function pointers.
    (kmem_cache_reap): Remove check on KMEM_CF_NO_RECLAIM.
    (slab_init, kalloc_init): Update calls to kmem_cache_init.
    (kalloc, kfree): Directly fall back on the physical allocator for big
    allocation sizes.
    (host_slab_info): Remove checks on defunct flags.
    * kern/slab.h (kmem_slab_alloc_fn_t, kmem_slab_free_fn_t): Remove types.
    (struct kmem_cache): Add `slab_order' member, remove `slab_alloc_fn' and
    `slab_free_fn' members.
    (KMEM_CACHE_NOCPUPOOL, KMEM_CACHE_NORECLAIM): Remove macros.
    (kmem_cache_init): Update prototype, remove custom allocation functions.
    * kern/thread.c (stack_alloc): Allocate stacks from the physical allocator.
    * vm/vm_map.c (vm_map_kentry_cache, kentry_data, kentry_data_size): Remove
    variables.
    (kentry_pagealloc): Remove function.
    (vm_map_init): Update calls to kmem_cache_init, remove initialization of
    vm_map_kentry_cache.
    (vm_map_create, _vm_map_entry_dispose, vm_map_copyout): Unconditionnally
    use vm_map_entry_cache.
    * vm/vm_map.h (kentry_data, kentry_data_size, kentry_count): Remove extern
    declarations.
    * vm/vm_page.h (VM_PT_STACK): New page type.
    * device/dev_lookup.c (dev_lookup_init): Update calls to kmem_cache_init.
    * device/dev_pager.c (dev_pager_hash_init, device_pager_init): Likewise.
    * device/ds_routines.c (mach_device_init, mach_device_trap_init): Likewise.
    * device/net_io.c (net_io_init): Likewise.
    * i386/i386/fpu.c (fpu_module_init): Likewise.
    * i386/i386/machine_task.c (machine_task_module_init): Likewise.
    * i386/i386/pcb.c (pcb_module_init): Likewise.
    * i386/intel/pmap.c (pmap_init): Likewise.
    * ipc/ipc_init.c (ipc_bootstrap): Likewise.
    * ipc/ipc_marequest.c (ipc_marequest_init): Likewise.
    * kern/act.c (global_act_init): Likewise.
    * kern/processor.c (pset_sys_init): Likewise.
    * kern/rdxtree.c (rdxtree_cache_init): Likewise.
    * kern/task.c (task_init): Likewise.
    * vm/memory_object_proxy.c (memory_object_proxy_init): Likewise.
    * vm/vm_external.c (vm_external_module_initialize): Likewise.
    * vm/vm_fault.c (vm_fault_init): Likewise.
    * vm/vm_object.c (vm_object_bootstrap): Likewise.
    * vm/vm_resident.c (vm_page_module_init): Likewise.
    (vm_page_bootstrap): Remove initialization of kentry_data.

-----------------------------------------------------------------------

Summary of changes:
 device/dev_lookup.c      |    2 +-
 device/dev_pager.c       |    4 +-
 device/ds_routines.c     |    4 +-
 device/net_io.c          |    4 +-
 i386/i386/db_trace.c     |    4 +-
 i386/i386/fpu.c          |    2 +-
 i386/i386/locore.S       |   14 +++--
 i386/i386/machine_task.c |    2 +-
 i386/i386/pcb.c          |    2 +-
 i386/i386at/model_dep.c  |   17 ++----
 i386/i386at/model_dep.h  |    9 +++
 i386/intel/pmap.c        |    4 +-
 ipc/ipc_init.c           |    8 +-
 ipc/ipc_marequest.c      |    2 +-
 kern/act.c               |    2 +-
 kern/processor.c         |    2 +-
 kern/rdxtree.c           |    2 +-
 kern/slab.c              |  140 +++++++++++++++------------------------------
 kern/slab.h              |   23 ++------
 kern/task.c              |    2 +-
 kern/thread.c            |   14 +++--
 vm/memory_object_proxy.c |    2 +-
 vm/vm_external.c         |    6 +-
 vm/vm_fault.c            |    2 +-
 vm/vm_map.c              |   60 ++-----------------
 vm/vm_map.h              |    3 -
 vm/vm_object.c           |    2 +-
 vm/vm_page.h             |    3 +-
 vm/vm_resident.c         |    8 +--
 29 files changed, 124 insertions(+), 225 deletions(-)


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