mpol_shared_policy_init

函数名称：mpol_shared_policy_init - initialize shared policy for inode*@sp: pointer to inode shared policy*@mpol: struct mempolicy to install* Install non-NULL @mpol in inode's shared policy rb-tree.* On entry, the current task has a reference on a non-NULL @mpol.

函数原型：void mpol_shared_policy_init(struct shared_policy *sp, struct mempolicy *mpol)

返回类型：void

参数：

类型	参数	名称
struct shared_policy *	sp
struct mempolicy *	mpol

2603

root =

2604

rwlock_init( & lock)

2606

如果mpol则

2609

NODEMASK_SCRATCH(scratch)

2611

如果非scratch则转到:put_mpol

2614

new等于This function just creates a new policy, does some check and simple* initialization. You must invoke mpol_set_nodemask() to set nodes.

2615

如果是错误则转到:free_scratch

2618

Protects ->fs, ->files, ->mm, ->group_info, ->comm, keyring* subscriptions and synchronises with wait4(). Also used in procfs. Also* pins the final release of task.io_context. Also protects ->cpuset and* ->cgroup.subsys[]. And ->vfork_done.

2619

ret等于mpol_set_nodemask is called after mpol_new() to set up the nodemask, if* any, for the new policy. mpol_new() has already validated the nodes* parameter with respect to the policy mode and flags. But, we need to

2620

task_unlock(当前进程)

2621

如果ret则转到:put_new

2625

vma_init( & pvma, NULL)

2626

The first byte after our end addresswithin vm_mm. 等于TASK_SIZE

2627

mpol_set_shared_policy(sp, & pvma, new)

2629

2630

2631

2632

NODEMASK_SCRATCH_FREE(scratch)

2633

2634

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