函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:mm\vmscan.c Create Date:2022-07-27 15:42:58
Last Modify:2022-05-23 13:41:30 Copyright©Brick
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函数名称：Use reclaim/compaction for costly allocs or under memory pressure

函数原型：static bool in_reclaim_compaction(struct scan_control *sc)

返回类型：bool

参数：

类型参数名称
struct scan_control *sc
2575  如果IS_ENABLED(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'y' or 'm',* 0 otherwise.(CONFIG_COMPACTION)且 Allocation order 且 Allocation order 大于PAGE_ALLOC_COSTLY_ORDER is the order at which allocations are deemed* costly to service. That is between allocation orders which should* coalesce naturally under reasonable reclaim pressure and those which* will not.或 Scan (total_size >> priority) pages at once 小于The "priority" of VM scanning is how much of the queues we will scan in one* go. A value of 12 for DEF_PRIORITY implies that we will scan 1/4096th of the* queues ("queue_length >> 12") during an aging round.减2的值则返回:true
2580  返回:false
调用者
名称描述
should_continue_reclaimReclaim/compaction is used for high-order allocation requests. It reclaims* order-0 pages before compacting the zone. should_continue_reclaim() returns* true if more pages should be reclaimed such that when the page allocator