Function report

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:mm\page_alloc.c Create Date:2022-07-28 15:04:40
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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Name:Drain pcplists of the indicated processor and zone.* The processor must either be the current processor and the* thread pinned to the current processor or a processor that* is not online.

Proto:static void drain_pages_zone(unsigned int cpu, struct zone *zone)

Type:void

Parameter:

TypeParameterName
unsigned intcpu
struct zone *zone
2814  local_irq_save(flags)
2815  pset = per_cpu_ptr(pageset, cpu)
2817  pcp = pcp
2818  If number of pages in the list Then Frees a number of pages from the PCP lists* Assumes all pages on list are in same zone, and of same order.* count is the number of pages to free.* If the zone was previously in an "all pages pinned" state then look to
2820  local_irq_restore(flags)
Caller
NameDescribe
drain_pagesDrain pcplists of all zones on the indicated processor.* The processor must either be the current processor and the* thread pinned to the current processor or a processor that* is not online.
drain_local_pagesSpill all of this CPU's per-cpu pages back into the buddy allocator.* The CPU has to be pinned. When zone parameter is non-NULL, spill just* the single zone's pages.