Function report

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:mm\page_alloc.c Create Date:2022-07-28 15:06:30
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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Annotation kernel can get tool activityDownload SCCTChinese

Name:si_mem_available

Proto:long si_mem_available(void)

Type:long

Parameter:Nothing

5079  wmark_low = 0
5085  When lru < NR_LRU_LISTS cycle pages[lru] = global_node_page_state(NR_LRU_BASE + lru)
5088  r_each_zone - helper macro to iterate over all memory zones*@zone - pointer to struct zone variable* The user only needs to declare the zone variable, for_each_zone* fills it in.(zone)
5089  wmark_low += low_wmark_pages(zone)
5095  available = global_zone_page_state( First 128 byte cacheline (assuming 64 bit words) ) - totalreserve_pages
5102  pagecache = pages[LRU_ACTIVE_FILE] + pages[LRU_INACTIVE_FILE]
5103  pagecache -= min - return minimum of two values of the same or compatible types*@x: first value*@y: second value(pagecache / 2, wmark_low)
5104  available += pagecache
5111  reclaimable = global_node_page_state(NR_SLAB_RECLAIMABLE) + global_node_page_state( reclaimable non-slab kernel pages )
5113  available += reclaimable - min - return minimum of two values of the same or compatible types*@x: first value*@y: second value(reclaimable / 2, wmark_low)
5115  If available < 0 Then available = 0
5117  Return available