There used to be more debug code in this layer, and it was removed.

I agree.

Jonathan Gray <jsg@jsg.id.au> wrote:

> unconditionally use new_vmcmd(), not only in the DEBUG path
> putting the function in a define is messy with no benefit
> 
> on mac mini m1, make -j8 build
> 
> before:
>    72m17.76s real   313m01.65s user    73m46.92s system
> after:
>    72m11.49s real   313m00.97s user    74m37.44s system
> 
> Index: sys/sys/exec.h
> ===================================================================
> RCS file: /cvs/src/sys/sys/exec.h,v
> diff -u -p -r1.55 exec.h
> --- sys/sys/exec.h	16 Oct 2024 18:47:48 -0000	1.55
> +++ sys/sys/exec.h	1 Nov 2024 10:23:53 -0000
> @@ -161,7 +161,6 @@ int	check_exec(struct proc *, struct exe
>  int	exec_setup_stack(struct proc *, struct exec_package *);
>  int	exec_process_vmcmds(struct proc *, struct exec_package *);
>  
> -#ifdef DEBUG
>  void	new_vmcmd(struct exec_vmcmd_set *evsp,
>  		    int (*proc)(struct proc *p, struct exec_vmcmd *),
>  		    u_long len, u_long addr, struct vnode *vp, u_long offset,
> @@ -170,25 +169,6 @@ void	new_vmcmd(struct exec_vmcmd_set *ev
>  	new_vmcmd(evsp,proc,len,addr,vp,offset,prot, 0);
>  #define NEW_VMCMD2(evsp,proc,len,addr,vp,offset,prot,flags) \
>  	new_vmcmd(evsp,proc,len,addr,vp,offset,prot,flags)
> -#else	/* DEBUG */
> -#define NEW_VMCMD(evsp,proc,len,addr,vp,offset,prot) \
> -	NEW_VMCMD2(evsp,proc,len,addr,vp,offset,prot,0)
> -#define	NEW_VMCMD2(evsp,proc,len,addr,vp,offset,prot,flags) do { \
> -	struct exec_vmcmd *__vcp; \
> -	if ((evsp)->evs_used >= (evsp)->evs_cnt) \
> -		vmcmdset_extend(evsp); \
> -	__vcp = &(evsp)->evs_cmds[(evsp)->evs_used++]; \
> -	__vcp->ev_proc = (proc); \
> -	__vcp->ev_len = (len); \
> -	__vcp->ev_addr = (addr); \
> -	if ((__vcp->ev_vp = (vp)) != NULLVP) \
> -		vref(vp); \
> -	__vcp->ev_offset = (offset); \
> -	__vcp->ev_prot = (prot); \
> -	__vcp->ev_flags = (flags); \
> -} while (0)
> -
> -#endif /* DEBUG */
>  
>  /* Initialize an empty vmcmd set */
>  #define VMCMDSET_INIT(vmc) do { \
> Index: sys/kern/exec_subr.c
> ===================================================================
> RCS file: /cvs/src/sys/kern/exec_subr.c,v
> diff -u -p -r1.67 exec_subr.c
> --- sys/kern/exec_subr.c	2 Apr 2024 08:39:16 -0000	1.67
> +++ sys/kern/exec_subr.c	1 Nov 2024 10:23:53 -0000
> @@ -42,14 +42,11 @@
>  
>  #include <uvm/uvm_extern.h>
>  
> -#ifdef DEBUG
>  /*
>   * new_vmcmd():
>   *	create a new vmcmd structure and fill in its fields based
>   *	on function call arguments.  make sure objects ref'd by
>   *	the vmcmd are 'held'.
> - *
> - * If not debugging, this is a macro, so it's expanded inline.
>   */
>  
>  void
> @@ -71,7 +68,6 @@ new_vmcmd(struct exec_vmcmd_set *evsp,
>  	vcp->ev_prot = prot;
>  	vcp->ev_flags = flags;
>  }
> -#endif /* DEBUG */
>  
>  void
>  vmcmdset_extend(struct exec_vmcmd_set *evsp)
>