Re: [patch] SImple Topology API v0.3 (1/2)

[Pavel Machek <pavel@suse.cz>]

Hi!

> Andrew, Linus, et al:
> 	Here's the latest version of the Simple Topology API.  I've broken the patches 
> into a solely in-kernel portion, and a portion that exposes the API to 
> userspace via syscalls and prctl.  This patch (part 1) is the in-kernel part. 
> I hope that the smaller versions of these patches will draw more feedback, 
> comments, flames, etc.  Other than that, the patch remains relatively unchanged 
> from the last posting.

> -   bool 'Multiquad NUMA system' CONFIG_MULTIQUAD
> +   bool 'Multi-node NUMA system support' CONFIG_X86_NUMA

Why not simply CONFIG_NUMA?
								Pavel

> +   if [ "" = "y" ]; then
> +      #Platform Choices
> +      bool 'Multiquad (IBM/Sequent) NUMAQ support' CONFIG_X86_NUMAQ
> +      if [ "" = "y" ]; then
> +         define_bool CONFIG_MULTIQUAD y
> +         define_bool CONFIG_X86_TSC_DISABLE y
> +      fi
> +   fi
>  fi
>  
>  bool 'Machine Check Exception' CONFIG_X86_MCE
> diff -Nur linux-2.5.27-vanilla/arch/i386/kernel/smpboot.c linux-2.5.27-api/arch/i386/kernel/smpboot.c
> --- linux-2.5.27-vanilla/arch/i386/kernel/smpboot.c	Sat Jul 20 12:11:18 2002
> +++ linux-2.5.27-api/arch/i386/kernel/smpboot.c	Wed Jul 24 17:33:41 2002
> @@ -60,6 +60,9 @@
>  /* Bitmask of currently online CPUs */
>  unsigned long cpu_online_map;
>  
> +/* Bitmask of currently online memory blocks */
> +unsigned long memblk_online_map;
> +
>  static volatile unsigned long cpu_callin_map;
>  volatile unsigned long cpu_callout_map;
>  static unsigned long smp_commenced_mask;
> diff -Nur linux-2.5.27-vanilla/include/asm-i386/mmzone.h linux-2.5.27-api/include/asm-i386/mmzone.h
> --- linux-2.5.27-vanilla/include/asm-i386/mmzone.h	Wed Dec 31 16:00:00 1969
> +++ linux-2.5.27-api/include/asm-i386/mmzone.h	Wed Jul 24 17:33:41 2002
> @@ -0,0 +1,53 @@
> +/*
> + * linux/include/asm-i386/mmzone.h
> + *
> + * Written by: Matthew Dobson, IBM Corporation
> + *
> + * Copyright (C) 2002, IBM Corp.
> + *
> + * All rights reserved.          
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by
> + * the Free Software Foundation; either version 2 of the License, or
> + * (at your option) any later version.
> + *
> + * This program is distributed in the hope that it will be useful, but
> + * WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
> + * NON INFRINGEMENT.  See the GNU General Public License for more
> + * details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
> + *
> + * Send feedback to <colpatch@us.ibm.com>
> + */
> +#ifndef _ASM_MMZONE_H_
> +#define _ASM_MMZONE_H_
> +
> +#ifdef CONFIG_X86_NUMAQ
> +
> +#define NR_MEMBLKS	32 /* Max number of Memory Blocks */
> +
> +#include <asm/numaq.h>
> +
> +#else /* !CONFIG_X86_NUMAQ */
> +
> +#define NR_MEMBLKS	1
> +
> +/* Other architectures wishing to use this simple topology API should fill
> +   in the below functions as appropriate in their own <arch>.h file. */
> +#define _cpu_to_node(cpu)	(0)
> +#define _memblk_to_node(memblk)	(0)
> +#define _node_to_node(nid)	(0)
> +#define _node_to_cpu(node)	(0)
> +#define _node_to_memblk(node)	(0)
> +
> +#endif /* CONFIG_X86_NUMAQ */
> +
> +/* Returns the number of the current Node. */
> +#define numa_node_id()		(_cpu_to_node(smp_processor_id()))
> +
> +#endif /* _ASM_MMZONE_H_ */
> diff -Nur linux-2.5.27-vanilla/include/asm-i386/numaq.h linux-2.5.27-api/include/asm-i386/numaq.h
> --- linux-2.5.27-vanilla/include/asm-i386/numaq.h	Wed Dec 31 16:00:00 1969
> +++ linux-2.5.27-api/include/asm-i386/numaq.h	Wed Jul 24 17:33:41 2002
> @@ -0,0 +1,60 @@
> +/*
> + * linux/include/asm-i386/numaq.h
> + *
> + * Written by: Matthew Dobson, IBM Corporation
> + *
> + * Copyright (C) 2002, IBM Corp.
> + *
> + * All rights reserved.          
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by
> + * the Free Software Foundation; either version 2 of the License, or
> + * (at your option) any later version.
> + *
> + * This program is distributed in the hope that it will be useful, but
> + * WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
> + * NON INFRINGEMENT.  See the GNU General Public License for more
> + * details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
> + *
> + * Send feedback to <colpatch@us.ibm.com>
> + */
> +#ifndef _I386_NUMAQ_H
> +#define _I386_NUMAQ_H
> +
> +#ifdef CONFIG_X86_NUMAQ
> +
> +#include <asm/smpboot.h>
> +
> +/* Returns the number of the node containing CPU 'cpu' */
> +#define _cpu_to_node(cpu) (cpu_to_logical_apicid(cpu) >> 4)
> +
> +/* Returns the number of the node containing MemBlk 'memblk' */
> +#define _memblk_to_node(memblk) (memblk)
> +
> +/* Returns the number of the node containing Node 'nid'.  This architecture is flat, 
> +   so it is a pretty simple function! */
> +#define _node_to_node(nid) (nid)
> +
> +/* Returns the number of the first CPU on Node 'node' */
> +static inline int _node_to_cpu(int node)
> +{
> +	int i, cpu, logical_apicid = node << 4;
> +
> +	for(i = 1; i < 16; i <<= 1)
> +		if ((cpu = logical_apicid_to_cpu(logical_apicid | i)) >= 0)
> +			return cpu;
> +
> +	return 0;
> +}
> +
> +/* Returns the number of the first MemBlk on Node 'node' */
> +#define _node_to_memblk(node) (node)
> +
> +#endif /* CONFIG_X86_NUMAQ */
> +#endif /* _I386_NUMAQ_H */
> diff -Nur linux-2.5.27-vanilla/include/asm-i386/smp.h linux-2.5.27-api/include/asm-i386/smp.h
> --- linux-2.5.27-vanilla/include/asm-i386/smp.h	Sat Jul 20 12:11:06 2002
> +++ linux-2.5.27-api/include/asm-i386/smp.h	Wed Jul 24 17:33:41 2002
> @@ -55,6 +55,7 @@
>  extern void smp_alloc_memory(void);
>  extern unsigned long phys_cpu_present_map;
>  extern unsigned long cpu_online_map;
> +extern unsigned long memblk_online_map;
>  extern volatile unsigned long smp_invalidate_needed;
>  extern int pic_mode;
>  extern int smp_num_siblings;
> @@ -95,6 +96,11 @@
>  	return hweight32(cpu_online_map);
>  }
>  
> +extern inline unsigned int num_online_memblks(void)
> +{
> +	return hweight32(memblk_online_map);
> +}
> +
>  extern inline int any_online_cpu(unsigned int mask)
>  {
>  	if (mask & cpu_online_map)
> diff -Nur linux-2.5.27-vanilla/include/linux/mmzone.h linux-2.5.27-api/include/linux/mmzone.h
> --- linux-2.5.27-vanilla/include/linux/mmzone.h	Sat Jul 20 12:11:05 2002
> +++ linux-2.5.27-api/include/linux/mmzone.h	Wed Jul 24 17:33:41 2002
> @@ -220,15 +20,15 @@
>  #define NODE_MEM_MAP(nid)	mem_map
>  #define MAX_NR_NODES		1
>  
> -#else /* !CONFIG_DISCONTIGMEM */
> -
> -#include <asm/mmzone.h>
> +#else /* CONFIG_DISCONTIGMEM */
>  
>  /* page->zone is currently 8 bits ... */
>  #define MAX_NR_NODES		(255 / MAX_NR_ZONES)
>  
>  #endif /* !CONFIG_DISCONTIGMEM */
>  
> +#include <asm/mmzone.h>
> +
>  #define MAP_ALIGN(x)	((((x) % sizeof(struct page)) == 0) ? (x) : ((x) + >  		sizeof(struct page) - ((x) % sizeof(struct page))))
>  
> diff -Nur linux-2.5.27-vanilla/include/linux/smp.h linux-2.5.27-api/include/linux/smp.h
> --- linux-2.5.27-vanilla/include/linux/smp.h	Sat Jul 20 12:11:22 2002
> +++ linux-2.5.27-api/include/linux/smp.h	Wed Jul 24 17:33:41 2002
> @@ -93,6 +93,7 @@
>  #define smp_call_function(func,info,retry,wait)	({ 0; })
>  static inline void smp_send_reschedule(int cpu) { }
>  static inline void smp_send_reschedule_all(void) { }
> +#define memblk_online_map			1
>  #define cpu_online_map				1
>  #define cpu_online(cpu)				({ cpu; 1; })
>  #define num_online_cpus()			1


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