函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:mm\memcontrol.c Create Date:2022-07-27 17:48:42
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：mem_cgroup_try_charge_delay

函数原型：int mem_cgroup_try_charge_delay(struct page *page, struct mm_struct *mm, gfp_t gfp_mask, struct mem_cgroup **memcgp, bool compound)

返回类型：int

参数：

类型参数名称
struct page *page
struct mm_struct *mm
gfp_tgfp_mask
struct mem_cgroup **memcgp
boolcompound
6384  ret等于mem_cgroup_try_charge - try charging a page*@page: page to charge*@mm: mm context of the victim*@gfp_mask: reclaim mode*@memcgp: charged memcg return*@compound: charge the page as compound or small page* Try to charge @page to the memcg that @mm belongs
6385  memcg等于memcgp
6386  mem_cgroup_throttle_swaprate(memcg, page_to_nid(page), gfp_mask)
6387  返回:ret
调用者
名称描述
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
do_anonymous_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 mmap_sem still held, but pte unmapped and unlocked.
do_cow_fault
__do_huge_pmd_anonymous_page
do_huge_pmd_wp_page_fallback
do_huge_pmd_wp_page
wp_page_copyHandle the case of a page which we actually need to copy to a new page.* Called with mmap_sem locked and the old page referenced, but* without the ptl held.* High level logic flow:* - Allocate a page, copy the content of the old page to the new one.