page_cgroup_ino

Name:page_cgroup_ino - return inode number of the memcg a page is charged to*@page: the page* Look up the closest online ancestor of the memory cgroup @page is charged to* and return its inode number or 0 if @page is not charged to any cgroup. It

Proto:ino_t page_cgroup_ino(struct page *page)

Type:ino_t

Parameter:

Type	Parameter	Name
struct page *	page

477

ino = 0

479

_read_lock() - mark the beginning of an RCU read-side critical section* When synchronize_rcu() is invoked on one CPU while other CPUs* are within RCU read-side critical sections, then the* synchronize_rcu() is guaranteed to block until after all the other

480

If PageSlab(page) && Not PageTail(page) Then memcg = memcg_from_slab_page(page)

482

Else memcg = READ_ONCE(mem_cgroup)

484

When memcg && Not (flags & CSS_ONLINE) cycle

485

memcg = parent_mem_cgroup - find the accounting parent of a memcg*@memcg: memcg whose parent to find* Returns the parent memcg, or NULL if this is the root or the memory* controller is in legacy no-hierarchy mode.

486

If memcg Then ino = rns ino associated with a cgroup

488

_read_unlock() - marks the end of an RCU read-side critical section.* In most situations, rcu_read_unlock() is immune from deadlock.* However, in kernels built with CONFIG_RCU_BOOST, rcu_read_unlock()

489

Return ino

**Caller**
Name	Describe
hwpoison_filter_task

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