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mm, vmalloc: move get_vmalloc_info() to vmalloc.c

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Now get_vmalloc_info() is in fs/proc/mmu.c.  There is no reason that this
code must be here and it's implementation needs vmlist_lock and it iterate
a vmlist which may be internal data structure for vmalloc.

It is preferable that vmlist_lock and vmlist is only used in vmalloc.c
for maintainability. So move the code to vmalloc.c

Signed-off-by: Joonsoo Kim <js1304@gmail.com>
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Atsushi Kumagai <kumagai-atsushi@mxc.nes.nec.co.jp>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Dave Anderson <anderson@redhat.com>
Cc: Eric Biederman <ebiederm@xmission.com>
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Joonsoo Kim 2013-04-29 15:07:28 -07:00 committed by Linus Torvalds
parent ef93247325
commit db3808c1ba
6 changed files with 64 additions and 79 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
fs/proc/Makefile
View File

@ -5,7 +5,7 @@
obj-y += proc.o
proc-y := nommu.o task_nommu.o
proc-$(CONFIG_MMU) := mmu.o task_mmu.o
proc-$(CONFIG_MMU) := task_mmu.o
proc-y += inode.o root.o base.o generic.o array.o \
fd.o

18
fs/proc/internal.h
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@ -30,24 +30,6 @@ extern int proc_net_init(void);
static inline int proc_net_init(void) { return 0; }
#endif
struct vmalloc_info {
unsigned long used;
unsigned long largest_chunk;
};
#ifdef CONFIG_MMU
#define VMALLOC_TOTAL (VMALLOC_END - VMALLOC_START)
extern void get_vmalloc_info(struct vmalloc_info *vmi);
#else
#define VMALLOC_TOTAL 0UL
#define get_vmalloc_info(vmi) \
do { \
(vmi)->used = 0; \
(vmi)->largest_chunk = 0; \
} while(0)
#endif
extern int proc_tid_stat(struct seq_file *m, struct pid_namespace *ns,
struct pid *pid, struct task_struct *task);
extern int proc_tgid_stat(struct seq_file *m, struct pid_namespace *ns,

1
fs/proc/meminfo.c
View File

@ -11,6 +11,7 @@
#include <linux/swap.h>
#include <linux/vmstat.h>
#include <linux/atomic.h>
#include <linux/vmalloc.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include "internal.h"

60
fs/proc/mmu.c
View File

@ -1,60 +0,0 @@
/* mmu.c: mmu memory info files
*
* Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* 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.
*/
#include <linux/spinlock.h>
#include <linux/vmalloc.h>
#include <linux/highmem.h>
#include <asm/pgtable.h>
#include "internal.h"
void get_vmalloc_info(struct vmalloc_info *vmi)
{
struct vm_struct *vma;
unsigned long free_area_size;
unsigned long prev_end;
vmi->used = 0;
if (!vmlist) {
vmi->largest_chunk = VMALLOC_TOTAL;
}
else {
vmi->largest_chunk = 0;
prev_end = VMALLOC_START;
read_lock(&vmlist_lock);
for (vma = vmlist; vma; vma = vma->next) {
unsigned long addr = (unsigned long) vma->addr;
/*
* Some archs keep another range for modules in vmlist
*/
if (addr < VMALLOC_START)
continue;
if (addr >= VMALLOC_END)
break;
vmi->used += vma->size;
free_area_size = addr - prev_end;
if (vmi->largest_chunk < free_area_size)
vmi->largest_chunk = free_area_size;
prev_end = vma->size + addr;
}
if (VMALLOC_END - prev_end > vmi->largest_chunk)
vmi->largest_chunk = VMALLOC_END - prev_end;
read_unlock(&vmlist_lock);
}
}

18
include/linux/vmalloc.h
View File

@ -158,4 +158,22 @@ pcpu_free_vm_areas(struct vm_struct **vms, int nr_vms)
# endif
#endif
struct vmalloc_info {
unsigned long used;
unsigned long largest_chunk;
};
#ifdef CONFIG_MMU
#define VMALLOC_TOTAL (VMALLOC_END - VMALLOC_START)
extern void get_vmalloc_info(struct vmalloc_info *vmi);
#else
#define VMALLOC_TOTAL 0UL
#define get_vmalloc_info(vmi) \
do { \
(vmi)->used = 0; \
(vmi)->largest_chunk = 0; \
} while (0)
#endif
#endif /* _LINUX_VMALLOC_H */

44
mm/vmalloc.c
View File

@ -2645,5 +2645,49 @@ static int __init proc_vmalloc_init(void)
return 0;
}
module_init(proc_vmalloc_init);
void get_vmalloc_info(struct vmalloc_info *vmi)
{
struct vm_struct *vma;
unsigned long free_area_size;
unsigned long prev_end;
vmi->used = 0;
if (!vmlist) {
vmi->largest_chunk = VMALLOC_TOTAL;
} else {
vmi->largest_chunk = 0;
prev_end = VMALLOC_START;
read_lock(&vmlist_lock);
for (vma = vmlist; vma; vma = vma->next) {
unsigned long addr = (unsigned long) vma->addr;
/*
* Some archs keep another range for modules in vmlist
*/
if (addr < VMALLOC_START)
continue;
if (addr >= VMALLOC_END)
break;
vmi->used += vma->size;
free_area_size = addr - prev_end;
if (vmi->largest_chunk < free_area_size)
vmi->largest_chunk = free_area_size;
prev_end = vma->size + addr;
}
if (VMALLOC_END - prev_end > vmi->largest_chunk)
vmi->largest_chunk = VMALLOC_END - prev_end;
read_unlock(&vmlist_lock);
}
}
#endif