sched: reorder task_struct to reduce padding on 64bit builds
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>
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@ -1021,6 +1021,7 @@ struct task_struct {
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#endif
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#endif
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int prio, static_prio, normal_prio;
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int prio, static_prio, normal_prio;
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unsigned int rt_priority;
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const struct sched_class *sched_class;
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const struct sched_class *sched_class;
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struct sched_entity se;
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struct sched_entity se;
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struct sched_rt_entity rt;
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struct sched_rt_entity rt;
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@ -1104,7 +1105,6 @@ struct task_struct {
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int __user *set_child_tid; /* CLONE_CHILD_SETTID */
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int __user *set_child_tid; /* CLONE_CHILD_SETTID */
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int __user *clear_child_tid; /* CLONE_CHILD_CLEARTID */
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int __user *clear_child_tid; /* CLONE_CHILD_CLEARTID */
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unsigned int rt_priority;
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cputime_t utime, stime, utimescaled, stimescaled;
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cputime_t utime, stime, utimescaled, stimescaled;
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cputime_t gtime;
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cputime_t gtime;
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cputime_t prev_utime, prev_stime;
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cputime_t prev_utime, prev_stime;
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@ -1123,12 +1123,12 @@ struct task_struct {
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gid_t gid,egid,sgid,fsgid;
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gid_t gid,egid,sgid,fsgid;
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struct group_info *group_info;
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struct group_info *group_info;
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kernel_cap_t cap_effective, cap_inheritable, cap_permitted, cap_bset;
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kernel_cap_t cap_effective, cap_inheritable, cap_permitted, cap_bset;
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unsigned securebits;
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struct user_struct *user;
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struct user_struct *user;
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unsigned securebits;
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#ifdef CONFIG_KEYS
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#ifdef CONFIG_KEYS
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unsigned char jit_keyring; /* default keyring to attach requested keys to */
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struct key *request_key_auth; /* assumed request_key authority */
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struct key *request_key_auth; /* assumed request_key authority */
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struct key *thread_keyring; /* keyring private to this thread */
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struct key *thread_keyring; /* keyring private to this thread */
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unsigned char jit_keyring; /* default keyring to attach requested keys to */
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#endif
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#endif
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char comm[TASK_COMM_LEN]; /* executable name excluding path
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char comm[TASK_COMM_LEN]; /* executable name excluding path
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- access with [gs]et_task_comm (which lock
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- access with [gs]et_task_comm (which lock
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@ -1215,8 +1215,8 @@ struct task_struct {
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# define MAX_LOCK_DEPTH 48UL
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# define MAX_LOCK_DEPTH 48UL
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u64 curr_chain_key;
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u64 curr_chain_key;
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int lockdep_depth;
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int lockdep_depth;
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struct held_lock held_locks[MAX_LOCK_DEPTH];
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unsigned int lockdep_recursion;
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unsigned int lockdep_recursion;
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struct held_lock held_locks[MAX_LOCK_DEPTH];
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#endif
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#endif
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/* journalling filesystem info */
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/* journalling filesystem info */
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@ -1244,10 +1244,6 @@ struct task_struct {
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u64 acct_vm_mem1; /* accumulated virtual memory usage */
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u64 acct_vm_mem1; /* accumulated virtual memory usage */
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cputime_t acct_stimexpd;/* stime since last update */
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cputime_t acct_stimexpd;/* stime since last update */
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#endif
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#endif
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#ifdef CONFIG_NUMA
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struct mempolicy *mempolicy;
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short il_next;
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#endif
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#ifdef CONFIG_CPUSETS
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#ifdef CONFIG_CPUSETS
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nodemask_t mems_allowed;
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nodemask_t mems_allowed;
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int cpuset_mems_generation;
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int cpuset_mems_generation;
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@ -1266,6 +1262,10 @@ struct task_struct {
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#endif
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#endif
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struct list_head pi_state_list;
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struct list_head pi_state_list;
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struct futex_pi_state *pi_state_cache;
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struct futex_pi_state *pi_state_cache;
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#endif
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#ifdef CONFIG_NUMA
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struct mempolicy *mempolicy;
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short il_next;
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#endif
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#endif
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atomic_t fs_excl; /* holding fs exclusive resources */
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atomic_t fs_excl; /* holding fs exclusive resources */
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struct rcu_head rcu;
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struct rcu_head rcu;
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