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 15:43:33
Last Modify:2022-05-23 13:41:30 Copyright©Brick
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函数名称：Only used by soft limit reclaim. Do not reuse for anything else.

函数原型：unsigned long mem_cgroup_shrink_node(struct mem_cgroup *memcg, gfp_t gfp_mask, bool noswap, pg_data_t *pgdat, unsigned long *nr_scanned)

返回类型：unsigned long

参数：

类型参数名称
struct mem_cgroup *memcg
gfp_tgfp_mask
boolnoswap
pg_data_t *pgdat
unsigned long *nr_scanned
3307  lruvec等于mem_cgroup_lruvec - get the lru list vector for a memcg & node*@memcg: memcg of the wanted lruvec* Returns the lru list vector holding pages for a given @memcg &*@node combination. This can be the node lruvec, if the memory* controller is disabled.
3308  struct scan_control sc = { How many pages shrink_list() should reclaim = SWAP_CLUSTER_MAX, * The memory cgroup that hit its limit and as a result is the * primary target of this reclaim invocation. = memcg, Writepage batching in laptop mode; RECLAIM_WRITE = !Flag that puts the machine in "laptop mode". Doubles as a timeout in jiffies:* a full sync is triggered after this time elapses without any disk activity., Can mapped pages be reclaimed? = 1, The highest zone to isolate pages for reclaim from = MAX_NR_ZONES - 1, Can pages be swapped as part of reclaim? = !noswap, }
3317  WARN_ON_ONCE(!reclaim_state)
3319  This context's GFP mask 等于gfp_mask按位与The set of flags that only affect watermark checking and reclaim* behaviour. This is used by the MM to obey the caller constraints* about IO, FS and watermark checking while ignoring placement* hints such as HIGHMEM usage.按位或GFP_HIGHUSER_MOVABLE按位与The set of flags that only affect watermark checking and reclaim* behaviour. This is used by the MM to obey the caller constraints* about IO, FS and watermark checking while ignoring placement* hints such as HIGHMEM usage.的反
3322  trace_mm_vmscan_memcg_softlimit_reclaim_begin( Allocation order , This context's GFP mask )
3332  shrink_lruvec(lruvec, & sc)
3334  trace_mm_vmscan_memcg_softlimit_reclaim_end( Number of pages freed so far during a call to shrink_zones() )
3336  nr_scanned等于 Incremented by the number of inactive pages that were scanned
3338  返回: Number of pages freed so far during a call to shrink_zones()
调用者
名称描述
mem_cgroup_soft_reclaim