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sched: reorder task_struct to reduce padding on 64bit builds

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This patch removes 24 bytes of padding and allows 1 extra object per
slab on my fedora based config.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Richard Kennedy
2008-05-15 12:09:15 +01:00
committed by Ingo Molnar
parent 81d41d7ece
commit c7aceaba04
1 changed files with 8 additions and 8 deletions
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16
include/linux/sched.h
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@@ -1021,6 +1021,7 @@ struct task_struct {
#endif #endif
int prio, static_prio, normal_prio; int prio, static_prio, normal_prio;
unsigned int rt_priority;
const struct sched_class *sched_class; const struct sched_class *sched_class;
struct sched_entity se; struct sched_entity se;
struct sched_rt_entity rt; struct sched_rt_entity rt;
@@ -1104,7 +1105,6 @@ struct task_struct {
int __user *set_child_tid; /* CLONE_CHILD_SETTID */ int __user *set_child_tid; /* CLONE_CHILD_SETTID */
int __user *clear_child_tid; /* CLONE_CHILD_CLEARTID */ int __user *clear_child_tid; /* CLONE_CHILD_CLEARTID */
unsigned int rt_priority;
cputime_t utime, stime, utimescaled, stimescaled; cputime_t utime, stime, utimescaled, stimescaled;
cputime_t gtime; cputime_t gtime;
cputime_t prev_utime, prev_stime; cputime_t prev_utime, prev_stime;
@@ -1123,12 +1123,12 @@ struct task_struct {
gid_t gid,egid,sgid,fsgid; gid_t gid,egid,sgid,fsgid;
struct group_info *group_info; struct group_info *group_info;
kernel_cap_t cap_effective, cap_inheritable, cap_permitted, cap_bset; kernel_cap_t cap_effective, cap_inheritable, cap_permitted, cap_bset;
unsigned securebits;
struct user_struct *user; struct user_struct *user;
unsigned securebits;
#ifdef CONFIG_KEYS #ifdef CONFIG_KEYS
unsigned char jit_keyring; /* default keyring to attach requested keys to */
struct key *request_key_auth; /* assumed request_key authority */ struct key *request_key_auth; /* assumed request_key authority */
struct key *thread_keyring; /* keyring private to this thread */ struct key *thread_keyring; /* keyring private to this thread */
unsigned char jit_keyring; /* default keyring to attach requested keys to */
#endif #endif
char comm[TASK_COMM_LEN]; /* executable name excluding path char comm[TASK_COMM_LEN]; /* executable name excluding path
- access with [gs]et_task_comm (which lock - access with [gs]et_task_comm (which lock
@@ -1215,8 +1215,8 @@ struct task_struct {
# define MAX_LOCK_DEPTH 48UL # define MAX_LOCK_DEPTH 48UL
u64 curr_chain_key; u64 curr_chain_key;
int lockdep_depth; int lockdep_depth;
struct held_lock held_locks[MAX_LOCK_DEPTH];
unsigned int lockdep_recursion; unsigned int lockdep_recursion;
struct held_lock held_locks[MAX_LOCK_DEPTH];
#endif #endif
/* journalling filesystem info */ /* journalling filesystem info */
@@ -1244,10 +1244,6 @@ struct task_struct {
u64 acct_vm_mem1; /* accumulated virtual memory usage */ u64 acct_vm_mem1; /* accumulated virtual memory usage */
cputime_t acct_stimexpd;/* stime since last update */ cputime_t acct_stimexpd;/* stime since last update */
#endif #endif
#ifdef CONFIG_NUMA
struct mempolicy *mempolicy;
short il_next;
#endif
#ifdef CONFIG_CPUSETS #ifdef CONFIG_CPUSETS
nodemask_t mems_allowed; nodemask_t mems_allowed;
int cpuset_mems_generation; int cpuset_mems_generation;
@@ -1266,6 +1262,10 @@ struct task_struct {
#endif #endif
struct list_head pi_state_list; struct list_head pi_state_list;
struct futex_pi_state *pi_state_cache; struct futex_pi_state *pi_state_cache;
#endif
#ifdef CONFIG_NUMA
struct mempolicy *mempolicy;
short il_next;
#endif #endif
atomic_t fs_excl; /* holding fs exclusive resources */ atomic_t fs_excl; /* holding fs exclusive resources */
struct rcu_head rcu; struct rcu_head rcu;