函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:include\linux\memcontrol.h Create Date:2022-07-27 06:56:25
Last Modify:2020-03-12 14:18:49 Copyright©Brick
首页 函数Tree
注解内核,赢得工具下载SCCTEnglish

函数名称：count_memcg_event_mm

函数原型：static inline void count_memcg_event_mm(struct mm_struct *mm, enum vm_event_item idx)

返回类型：void

参数：

类型参数名称
struct mm_struct *mm
enum vm_event_itemidx
765  如果mem_cgroup_disabled()则返回
768  _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
769  memcg等于mem_cgroup_from_task(cu_dereference() - fetch RCU-protected pointer for dereferencing*@p: The pointer to read, prior to dereferencing* This is a simple wrapper around rcu_dereference_check().(* "owner" points to a task that is regarded as the canonical * user/owner of this mm. All of the following must be true in * order for it to be changed: * current == mm->owner * current->mm != mm * new_owner->mm == mm * new_owner->alloc_lock is held))
770  如果此条件成立可能性大(为编译器优化)(memcg)则count_memcg_events(memcg, idx, 1)
772  _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()
调用者
名称描述
filemap_faultlemap_fault - read in file data for page fault handling*@vmf: struct vm_fault containing details of the fault* filemap_fault() is invoked via the vma operations vector for a* mapped memory region to read in file data during a page fault
do_swap_pageWe enter with non-exclusive mmap_sem (to exclude vma changes,* but allow concurrent faults), and pte mapped but not yet locked.* We return with pte unmapped and unlocked.* We return with the mmap_sem locked or unlocked in the same cases
handle_mm_faultBy the time we get here, we already hold the mm semaphore* The mmap_sem may have been released depending on flags and our* return value. See filemap_fault() and __lock_page_or_retry().
dax_iomap_pte_fault