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Unify /proc/slabinfo configuration

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Both SLUB and SLAB really did almost exactly the same thing for
/proc/slabinfo setup, using duplicate code and per-allocator #ifdef's.

This just creates a common CONFIG_SLABINFO that is enabled by both SLUB
and SLAB, and shares all the setup code.  Maybe SLOB will want this some
day too.

Reviewed-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Linus Torvalds 2008-01-02 13:04:48 -08:00
parent 6b6adc22a0
commit 158a962422
7 changed files with 23 additions and 27 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

21
fs/proc/proc_misc.c
View file

@ -410,7 +410,7 @@ static const struct file_operations proc_modules_operations = {
};
#endif
#ifdef CONFIG_SLAB
#ifdef CONFIG_SLABINFO
static int slabinfo_open(struct inode *inode, struct file *file)
{
return seq_open(file, &slabinfo_op);
@ -451,20 +451,6 @@ static const struct file_operations proc_slabstats_operations = {
#endif
#endif
#ifdef CONFIG_SLUB
static int slabinfo_open(struct inode *inode, struct file *file)
{
return seq_open(file, &slabinfo_op);
}
static const struct file_operations proc_slabinfo_operations = {
.open = slabinfo_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release,
};
#endif
static int show_stat(struct seq_file *p, void *v)
{
int i;
@ -742,14 +728,11 @@ void __init proc_misc_init(void)
#endif
create_seq_entry("stat", 0, &proc_stat_operations);
create_seq_entry("interrupts", 0, &proc_interrupts_operations);
#ifdef CONFIG_SLAB
#ifdef CONFIG_SLABINFO
create_seq_entry("slabinfo",S_IWUSR|S_IRUGO,&proc_slabinfo_operations);
#ifdef CONFIG_DEBUG_SLAB_LEAK
create_seq_entry("slab_allocators", 0 ,&proc_slabstats_operations);
#endif
#endif
#ifdef CONFIG_SLUB
create_seq_entry("slabinfo", S_IWUSR|S_IRUGO, &proc_slabinfo_operations);
#endif
create_seq_entry("buddyinfo",S_IRUGO, &fragmentation_file_operations);
create_seq_entry("pagetypeinfo", S_IRUGO, &pagetypeinfo_file_ops);

5
include/linux/slab.h
View file

@ -271,5 +271,10 @@ static inline void *kzalloc(size_t size, gfp_t flags)
return kmalloc(size, flags | __GFP_ZERO);
}
#ifdef CONFIG_SLABINFO
extern const struct seq_operations slabinfo_op;
ssize_t slabinfo_write(struct file *, const char __user *, size_t, loff_t *);
#endif
#endif /* __KERNEL__ */
#endif /* _LINUX_SLAB_H */

3
include/linux/slab_def.h
View file

@ -95,7 +95,4 @@ found:
#endif /* CONFIG_NUMA */
extern const struct seq_operations slabinfo_op;
ssize_t slabinfo_write(struct file *, const char __user *, size_t, loff_t *);
#endif /* _LINUX_SLAB_DEF_H */

2
include/linux/slub_def.h
View file

@ -200,6 +200,4 @@ static __always_inline void *kmalloc_node(size_t size, gfp_t flags, int node)
}
#endif
extern const struct seq_operations slabinfo_op;
#endif /* _LINUX_SLUB_DEF_H */

6
init/Kconfig
View file

@ -658,6 +658,12 @@ endchoice
endmenu # General setup
config SLABINFO
bool
depends on PROC_FS
depends on SLAB || SLUB
default y
config RT_MUTEXES
boolean
select PLIST

2
mm/slab.c
View file

@ -4105,7 +4105,7 @@ out:
schedule_delayed_work(work, round_jiffies_relative(REAPTIMEOUT_CPUC));
}
#ifdef CONFIG_PROC_FS
#ifdef CONFIG_SLABINFO
static void print_slabinfo_header(struct seq_file *m)
{

11
mm/slub.c
View file

@ -4127,7 +4127,14 @@ __initcall(slab_sysfs_init);
/*
* The /proc/slabinfo ABI
*/
#ifdef CONFIG_PROC_FS
#ifdef CONFIG_SLABINFO
ssize_t slabinfo_write(struct file *file, const char __user * buffer,
size_t count, loff_t *ppos)
{
return -EINVAL;
}
static void print_slabinfo_header(struct seq_file *m)
{
@ -4201,4 +4208,4 @@ const struct seq_operations slabinfo_op = {
.show = s_show,
};
#endif /* CONFIG_PROC_FS */
#endif /* CONFIG_SLABINFO */