函数逻辑报告

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v5.5.9

Brick Technologies Co., Ltd

Source Code:mm\percpu.c Create Date:2022-07-27 15:51:14
Last Modify:2022-05-23 13:52:24 Copyright©Brick
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函数名称：pcpu_chunk_populated - post-population bookkeeping*@chunk: pcpu_chunk which got populated*@page_start: the start page*@page_end: the end page* Pages in [@page_start,@page_end) have been populated to @chunk. Update* the bookkeeping information accordingly

函数原型：static void pcpu_chunk_populated(struct pcpu_chunk *chunk, int page_start, int page_end)

返回类型：void

参数：

类型参数名称
struct pcpu_chunk *chunk
intpage_start
intpage_end
1475  nr等于page_end减page_start
1477  lockdep_assert_held( & pcpu_lock)
1479  bitmap_set( populated bitmap , page_start, nr)
1480  # of populated pages 加等于nr
1481  The number of populated pages in use by the allocator, protected by* pcpu_lock. This number is kept per a unit per chunk (i.e. when a page gets* allocated/deallocated, it is allocated/deallocated in all units of a chunk加等于nr
1483  pcpu_update_empty_pages - update empty page counters*@chunk: chunk of interest*@nr: nr of empty pages* This is used to keep track of the empty pages now based on the premise* a md_block covers a page. The hint update functions recognize if a block
调用者
名称描述
pcpu_allocpcpu_alloc - the percpu allocator*@size: size of area to allocate in bytes*@align: alignment of area (max PAGE_SIZE)*@reserved: allocate from the reserved chunk if available*@gfp: allocation flags* Allocate percpu area of @size bytes aligned at @align
pcpu_balance_workfnBalance work is used to populate or destroy chunks asynchronously. We* try to keep the number of populated free pages between* PCPU_EMPTY_POP_PAGES_LOW and HIGH for atomic allocations and at most one* empty chunk.