blk_mq_alloc

函数名称：blk_mq_alloc_rqs

函数原型：int blk_mq_alloc_rqs(struct blk_mq_tag_set *set, struct blk_mq_tags *tags, unsigned int hctx_idx, unsigned int depth)

返回类型：int

参数：

类型	参数	名称
struct blk_mq_tag_set *	set
struct blk_mq_tags *	tags
unsigned int	hctx_idx
unsigned int	depth

2134

this_order等于max_order

2139

当this_order且left小于order_to_size(this_order - 1)循环

2140

this_order自减

2142

循环

2143

page等于Allocate pages, preferring the node given as nid. When nid == NUMA_NO_NODE,* prefer the current CPU's closest node. Otherwise node must be valid and* online.

2146

如果page则退出

2148

如果非this_order自减则退出

2150

如果order_to_size(this_order)小于rq_size则退出

2152

当1循环

2154

如果非page则转到:fail

2157

私有数据指针等于this_order

2158

添加链表项

2160

p等于page_address(page)

2165

kmemleak_alloc - register a newly allocated object*@ptr: pointer to beginning of the object*@size: size of the object*@min_count: minimum number of references to this object. If during memory* scanning a number of references less than @min_count is found,

2166

entries_per_page等于order_to_size(this_order)除rq_size

2167

to_do等于两数取小(entries_per_page, depth - i)

2168

left减等于to_do乘rq_size

2169

以j小于to_do 循环

2170

rq等于p

2172

static_rqs[i]等于rq

2173

如果blk_mq_init_request(set, rq, hctx_idx, node)则

2174

static_rqs[i] = NULL

2175

转到:fail

2178

p加等于rq_size

2179

i自加

名称	描述
__blk_mq_alloc_rq_map
blk_mq_tag_update_depth
blk_mq_sched_alloc_tags

函数逻辑报告