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36412d79b4
reducues the maintenance load for the mutex code. The only MD portions of the mutex code are in machine/mutex.h now, which include the assembly macros for handling mutexes as well as optionally overriding the mutex micro-operations. For example, we use optimized micro-ops on the x86 platform #ifndef I386_CPU. - Change the behavior of the SMP_DEBUG kernel option. In the new code, mtx_assert() only depends on INVARIANTS, allowing other kernel developers to have working mutex assertiions without having to include all of the mutex debugging code. The SMP_DEBUG kernel option has been renamed to MUTEX_DEBUG and now just controls extra mutex debugging code. - Abolish the ugly mtx_f hack. Instead, we dynamically allocate seperate mtx_debug structures on the fly in mtx_init, except for mutexes that are initiated very early in the boot process. These mutexes are declared using a special MUTEX_DECLARE() macro, and use a new flag MTX_COLD when calling mtx_init. This is still somewhat hackish, but it is less evil than the mtx_f filler struct, and the mtx struct is now the same size with and without mutex debugging code. - Add some micro-micro-operation macros for doing the actual atomic operations on the mutex mtx_lock field to make it easier for other archs to override/optimize mutex ops if needed. These new tiny ops also clean up the code in some places by replacing long atomic operation function calls that spanned 2-3 lines with a short 1-line macro call. - Don't call mi_switch() from mtx_enter_hard() when we block while trying to obtain a sleep mutex. Calling mi_switch() would bogusly release Giant before switching to the next process. Instead, inline most of the code from mi_switch() in the mtx_enter_hard() function. Note that when we finally kill Giant we can back this out and go back to calling mi_switch(). |
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| .. | ||
| pc | ||
| _limits.h | ||
| ansi.h | ||
| asm.h | ||
| atomic.h | ||
| bootinfo.h | ||
| bus_memio.h | ||
| bus_pio.h | ||
| bus.h | ||
| clock.h | ||
| clockvar.h | ||
| console.h | ||
| cpu.h | ||
| cpufunc.h | ||
| db_machdep.h | ||
| efi.h | ||
| elf.h | ||
| endian.h | ||
| exec.h | ||
| float.h | ||
| floatingpoint.h | ||
| fpu.h | ||
| frame.h | ||
| globaldata.h | ||
| globals.h | ||
| ia64_cpu.h | ||
| ieee.h | ||
| ieeefp.h | ||
| in_cksum.h | ||
| inst.h | ||
| intr.h | ||
| intrcnt.h | ||
| ioctl_bt848.h | ||
| ioctl_fd.h | ||
| ioctl_meteor.h | ||
| ipl.h | ||
| limits.h | ||
| lock.h | ||
| md_var.h | ||
| mouse.h | ||
| mutex.h | ||
| pal.h | ||
| param.h | ||
| pcb.h | ||
| pcpu.h | ||
| pmap.h | ||
| proc.h | ||
| profile.h | ||
| ptrace.h | ||
| reg.h | ||
| reloc.h | ||
| resource.h | ||
| setjmp.h | ||
| sigframe.h | ||
| signal.h | ||
| smp.h | ||
| stdarg.h | ||
| sysarch.h | ||
| types.h | ||
| ucontext.h | ||
| varargs.h | ||
| vmparam.h | ||