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* Changed the meaning of the {KERNEL,USER}_STACK_SIZE macros to not

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include the guard pages. Adjusted the kernel and boot loader code
  accordingly -- the guard pages size is added/not removed respectively.
  The stack size passed to _kern_spawn_thread() is now the actually usable
  size, and it is no longer possible to specify a size smaller than or
  equal to the guard pages size.
* vm_create_anonymous_area(): Precommit two pages maximum -- a stack with
  only one page usable size obviously doesn't need two pages.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@26819 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Ingo Weinhold
2008-08-05 17:19:46 +00:00
parent afa9fe8958
commit 57f2b5a013
14 changed files with 78 additions and 57 deletions
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src/system/kernel/thread.cpp
+5 -2
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@@ -391,7 +391,8 @@ create_thread(thread_creation_attributes& attributes, bool kernel)
thread->id);
thread->kernel_stack_area = create_area(stack_name,
(void **)&thread->kernel_stack_base, B_ANY_KERNEL_ADDRESS,
KERNEL_STACK_SIZE, B_FULL_LOCK,
KERNEL_STACK_SIZE + KERNEL_STACK_GUARD_PAGES * B_PAGE_SIZE,
B_FULL_LOCK,
B_KERNEL_READ_AREA | B_KERNEL_WRITE_AREA | B_KERNEL_STACK_AREA);
if (thread->kernel_stack_area < 0) {
@@ -405,7 +406,8 @@ create_thread(thread_creation_attributes& attributes, bool kernel)
return status;
}
thread->kernel_stack_top = thread->kernel_stack_base + KERNEL_STACK_SIZE;
thread->kernel_stack_top = thread->kernel_stack_base + KERNEL_STACK_SIZE
+ KERNEL_STACK_GUARD_PAGES * B_PAGE_SIZE;
state = disable_interrupts();
GRAB_THREAD_LOCK();
@@ -499,6 +501,7 @@ create_thread(thread_creation_attributes& attributes, bool kernel)
thread->user_stack_size = USER_STACK_SIZE;
else
thread->user_stack_size = PAGE_ALIGN(attributes.stack_size);
thread->user_stack_size += USER_STACK_GUARD_PAGES * B_PAGE_SIZE;
snprintf(stack_name, B_OS_NAME_LENGTH, "%s_%ld_stack",
attributes.name, thread->id);