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 17:48:06
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：mem_cgroup_move_charge_pte_range

函数原型：static int mem_cgroup_move_charge_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end, struct mm_walk *walk)

返回类型：int

参数：

类型参数名称
pmd_t *pmd
unsigned longaddr
unsigned longend
struct mm_walk *walk
5682  ret等于0
5683  vma等于vma
5690  ptl等于mmap_sem must be held on entry
5691  如果ptl则
5692  如果precharge小于HPAGE_PMD_NR则
5693  自旋锁解锁
5694  返回:0
5696  target_type等于We don't consider PMD mapped swapping or file mapped pages because THP does* not support them for now.* Caller should make sure that pmd_trans_huge(pmd) is true.
5697  如果target_type恒等于MC_TARGET_PAGE则
5698  page等于page
5699  如果非solate_lru_page - tries to isolate a page from its LRU list*@page: page to isolate from its LRU list* Isolates a @page from an LRU list, clears PageLRU and adjusts the* vmstat statistic corresponding to whatever LRU list the page was on.则
5707  Perform a free_page(), also freeing any swap cache associated with* this page if it is the last user of the page.
5708  否则如果target_type恒等于MC_TARGET_DEVICE则
5709  page等于page
5710  如果非mem_cgroup_move_account - move account of the page*@page: the page*@compound: charge the page as compound or small page*@from: mem_cgroup which the page is moved from.*@to: mem_cgroup which the page is moved to. @from != @to.则
5712  precharge减等于HPAGE_PMD_NR
5713  moved_charge加等于HPAGE_PMD_NR
5715  Perform a free_page(), also freeing any swap cache associated with* this page if it is the last user of the page.
5717  自旋锁解锁
5718  返回:0
5721  如果This is a noop if Transparent Hugepage Support is not built into* the kernel则返回:0
5723  retry :
5724  pte等于pte_offset_map_lock(The address space we belong to. , pmd, addr, & ptl)
5725  以addr不等于end循环
5726  ptent等于*pte自加
5727  bool device = false
5730  如果非precharge则退出
5734  当:get_mctgt_type - get target type of moving charge*@vma: the vma the pte to be checked belongs*@addr: the address corresponding to the pte to be checked*@ptent: the pte to be checked*@target: the pointer the target page or swap ent will be stored(can be 恒等于MC_TARGET_DEVICE
5735  device = true
5737  当:get_mctgt_type - get target type of moving charge*@vma: the vma the pte to be checked belongs*@addr: the address corresponding to the pte to be checked*@ptent: the pte to be checked*@target: the pointer the target page or swap ent will be stored(can be 恒等于MC_TARGET_PAGE
5738  page等于page
5745  如果PageTransCompound returns true for both transparent huge pages* and hugetlbfs pages, so it should only be called when it's known* that hugetlbfs pages aren't involved.则转到:put
5747  如果非device且solate_lru_page - tries to isolate a page from its LRU list*@page: page to isolate from its LRU list* Isolates a @page from an LRU list, clears PageLRU and adjusts the* vmstat statistic corresponding to whatever LRU list the page was on.则转到:put
5749  如果非mem_cgroup_move_account - move account of the page*@page: the page*@compound: charge the page as compound or small page*@from: mem_cgroup which the page is moved from.*@to: mem_cgroup which the page is moved to. @from != @to.则
5751  precharge自减
5753  moved_charge自加
5755  如果非device则putback_lru_page - put previously isolated page onto appropriate LRU list*@page: page to be put back to appropriate lru list* Add previously isolated @page to appropriate LRU list.* Page may still be unevictable for other reasons.
5757  put :
5758  Perform a free_page(), also freeing any swap cache associated with* this page if it is the last user of the page.
5759  退出
5760  当:get_mctgt_type - get target type of moving charge*@vma: the vma the pte to be checked belongs*@addr: the address corresponding to the pte to be checked*@ptent: the pte to be checked*@target: the pointer the target page or swap ent will be stored(can be 恒等于MC_TARGET_SWAP
5761  ent等于ent
5762  如果非mem_cgroup_move_swap_account - move swap charge and swap_cgroup's record则
5763  precharge自减
5765  moved_swap自加
5767  退出
5768  默认
5769  退出
5772  pte_unmap_unlock(pte - 1, ptl)
5773  cond_resched()
5775  如果addr不等于end则
5782  ret等于Handlers for move charge at task migration.
5783  如果非ret则转到:retry
5787  返回:ret