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Reorganize data elements to reduce struct sizes 

Thanks for the comments. I have incorportated them all.

CONFIG_OCFS2_FS_STATS is enabled and CONFIG_DEBUG_LOCK_ALLOC is disabled.
Statistics now look like -
ocfs2_write_ctxt: 2144 - 2136 = 8
ocfs2_inode_info: 1960 - 1848 = 112
ocfs2_journal: 168 - 160 = 8
ocfs2_lock_res: 336 - 304 = 32
ocfs2_refcount_tree: 512 - 472 = 40

Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.de>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
This commit is contained in:
Goldwyn Rodrigues 2010-06-10 17:21:36 -05:00 committed by Joel Becker
parent 95fa859a26
commit 83fd9c7f65
5 changed files with 24 additions and 19 deletions
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2
fs/ocfs2/aops.c
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@ -883,8 +883,8 @@ struct ocfs2_write_ctxt {
* out in so that future reads from that region will get
* zero's.
*/
struct page *w_pages[OCFS2_MAX_CTXT_PAGES];
unsigned int w_num_pages;
struct page *w_pages[OCFS2_MAX_CTXT_PAGES];
struct page *w_target_page;
/*

11
fs/ocfs2/inode.h
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@ -46,27 +46,24 @@ struct ocfs2_inode_info
/* These fields are protected by ip_lock */
spinlock_t ip_lock;
u32 ip_open_count;
u32 ip_clusters;
struct list_head ip_io_markers;
u32 ip_clusters;
u16 ip_dyn_features;
struct mutex ip_io_mutex;
u32 ip_flags; /* see below */
u32 ip_attr; /* inode attributes */
u16 ip_dyn_features;
/* protected by recovery_lock. */
struct inode *ip_next_orphan;
u32 ip_dir_start_lookup;
struct ocfs2_caching_info ip_metadata_cache;
struct ocfs2_extent_map ip_extent_map;
struct inode vfs_inode;
struct jbd2_inode ip_jinode;
u32 ip_dir_start_lookup;
/* Only valid if the inode is the dir. */
u32 ip_last_used_slot;
u64 ip_last_used_group;

3
fs/ocfs2/journal.h
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@ -67,11 +67,12 @@ struct ocfs2_journal {
struct buffer_head *j_bh; /* Journal disk inode block */
atomic_t j_num_trans; /* Number of transactions
* currently in the system. */
spinlock_t j_lock;
unsigned long j_trans_id;
struct rw_semaphore j_trans_barrier;
wait_queue_head_t j_checkpointed;
spinlock_t j_lock;
/* both fields protected by j_lock*/
struct list_head j_la_cleanups;
struct work_struct j_recovery_work;
};

23
fs/ocfs2/ocfs2.h
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@ -150,26 +150,33 @@ typedef void (*ocfs2_lock_callback)(int status, unsigned long data);
struct ocfs2_lock_res {
void *l_priv;
struct ocfs2_lock_res_ops *l_ops;
spinlock_t l_lock;
struct list_head l_blocked_list;
struct list_head l_mask_waiters;
enum ocfs2_lock_type l_type;
unsigned long l_flags;
char l_name[OCFS2_LOCK_ID_MAX_LEN];
int l_level;
unsigned int l_ro_holders;
unsigned int l_ex_holders;
struct ocfs2_dlm_lksb l_lksb;
unsigned char l_level;
/* Data packed - type enum ocfs2_lock_type */
unsigned char l_type;
/* used from AST/BAST funcs. */
enum ocfs2_ast_action l_action;
enum ocfs2_unlock_action l_unlock_action;
int l_requested;
int l_blocking;
/* Data packed - enum type ocfs2_ast_action */
unsigned char l_action;
/* Data packed - enum type ocfs2_unlock_action */
unsigned char l_unlock_action;
unsigned char l_requested;
unsigned char l_blocking;
unsigned int l_pending_gen;
spinlock_t l_lock;
struct ocfs2_dlm_lksb l_lksb;
wait_queue_head_t l_event;
struct list_head l_debug_list;

4
fs/ocfs2/refcounttree.h
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@ -21,14 +21,14 @@ struct ocfs2_refcount_tree {
struct rb_node rf_node;
u64 rf_blkno;
u32 rf_generation;
struct kref rf_getcnt;
struct rw_semaphore rf_sem;
struct ocfs2_lock_res rf_lockres;
struct kref rf_getcnt;
int rf_removed;
/* the following 4 fields are used by caching_info. */
struct ocfs2_caching_info rf_ci;
spinlock_t rf_lock;
struct ocfs2_caching_info rf_ci;
struct mutex rf_io_mutex;
struct super_block *rf_sb;
};