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Commit 4882b911 authored by qctecmdr Service's avatar qctecmdr Service Committed by Gerrit - the friendly Code Review server
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Merge "mm: swap: swap ratio support"

parents 1813d9c4 ac4b2c42

include/linux/plist.h

+3 −0
Original line number Diff line number Diff line
@@ -266,6 +266,9 @@ static inline int plist_node_empty(const struct plist_node *node) 
#define plist_next(pos) \

	list_next_entry(pos, node_list)



#define plist_next_entry(pos, type, member)   \

	container_of(plist_next(pos), type, member)



/**

 * plist_prev - get the prev entry in list

 * @pos:	the type * to cursor

include/linux/swap.h

+5 −0
Original line number Diff line number Diff line
@@ -178,6 +178,7 @@ enum { 


#define SWAP_CLUSTER_MAX 32UL

#define COMPACT_CLUSTER_MAX SWAP_CLUSTER_MAX

#define SWAPFILE_CLUSTER	256



#define SWAP_MAP_MAX	0x3e	/* Max duplication count, in first swap_map */

#define SWAP_MAP_BAD	0x3f	/* Note pageblock is bad, in first swap_map */
@@ -273,6 +274,8 @@ struct swap_info_struct { 
					 */

	struct work_struct discard_work; /* discard worker */

	struct swap_cluster_list discard_clusters; /* discard clusters list */

	unsigned int write_pending;

	unsigned int max_writes;

};



#ifdef CONFIG_64BIT
@@ -355,6 +358,8 @@ extern unsigned long mem_cgroup_shrink_node(struct mem_cgroup *mem, 
						unsigned long *nr_scanned);

extern unsigned long shrink_all_memory(unsigned long nr_pages);

extern int vm_swappiness;

extern int sysctl_swap_ratio;

extern int sysctl_swap_ratio_enable;

extern int remove_mapping(struct address_space *mapping, struct page *page);

extern unsigned long vm_total_pages;

include/linux/swapfile.h

+5 −0
Original line number Diff line number Diff line
@@ -8,9 +8,14 @@ 
 */

extern spinlock_t swap_lock;

extern struct plist_head swap_active_head;

extern spinlock_t swap_avail_lock;

extern struct plist_head *swap_avail_heads;

extern struct swap_info_struct *swap_info[];

extern int try_to_unuse(unsigned int, bool, unsigned long);

extern unsigned long generic_max_swapfile_size(void);

extern unsigned long max_swapfile_size(void);

extern int swap_ratio(struct swap_info_struct **si, int node);

extern void setup_swap_ratio(struct swap_info_struct *p, int prio);

extern bool is_swap_ratio_group(int prio);



#endif /* _LINUX_SWAPFILE_H */

kernel/sysctl.c

+16 −0
Original line number Diff line number Diff line
@@ -1672,6 +1672,22 @@ static struct ctl_table vm_table[] = { 
		.extra1		= (void *)&mmap_rnd_compat_bits_min,

		.extra2		= (void *)&mmap_rnd_compat_bits_max,

	},

#endif

#ifdef CONFIG_SWAP

	{

		.procname	= "swap_ratio",

		.data		= &sysctl_swap_ratio,

		.maxlen		= sizeof(sysctl_swap_ratio),

		.mode		= 0644,

		.proc_handler	= proc_dointvec_minmax,

	},

	{

		.procname	= "swap_ratio_enable",

		.data		= &sysctl_swap_ratio_enable,

		.maxlen		= sizeof(sysctl_swap_ratio_enable),

		.mode		= 0644,

		.proc_handler	= proc_dointvec_minmax,

	},

#endif

	{ }

};

mm/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -54,7 +54,7 @@ ifdef CONFIG_MMU 
endif

obj-$(CONFIG_HAVE_MEMBLOCK) += memblock.o



obj-$(CONFIG_SWAP)	+= page_io.o swap_state.o swapfile.o swap_slots.o

obj-$(CONFIG_SWAP)	+= page_io.o swap_state.o swapfile.o swap_slots.o swap_ratio.o

obj-$(CONFIG_FRONTSWAP)	+= frontswap.o

obj-$(CONFIG_ZSWAP)	+= zswap.o

obj-$(CONFIG_HAS_DMA)	+= dmapool.o