struct mem_section { @@ -1183,8 +1201,7 @@ struct mem_section { */ unsigned long section_mem_map; /* See declaration of similar field in struct zone */ unsigned long *pageblock_flags; struct mem_section_usage *usage; #ifdef CONFIG_PAGE_EXTENSION /* * If SPARSEMEM, pgdat doesn't ...
A pointer to a 'struct mem_section_usage' instance replaces the existing pointer to a 'pageblock_flags' bitmap. Effectively it adds one more 'unsigned long' beyond the 'pageblock_flags' (usemap) allocation to house a new 'subsection_map' bitmap. The new bitmap enables the memory hot{...
sparse_init_one_section(__nr_to_section(pnum), pnum, map, usage, SECTION_IS_EARLY);//【2.4】usage = (void*) usage +mem_section_usage_size(); } sparse_buffer_fini();//【2.5】return; failed:/*We failed to allocate, mark all the following pnums as not present*/for_each_present_s...
#ifdefCONFIG_TASK_XACCT/* Accumulated RSS usage: */u64 acct_rss_mem1;/* Accumulated virtual memory usage: */u64 acct_vm_mem1;/* stime + utime since last update: */u64 acct_timexpd;#endif #ifdefCONFIG_CPUSETS/* Protected by ->alloc_lock: */nodemask_t mems_allowed;/* Seqence num...
如果是开启可非vmemmap的sparse内存模式,则需要增加section字段表示page所处于的mem_section: 当然上述形式如果开启了last_cpupid,则划分如下: 除了上述四种形式,sparse还支持没有node id形式来支持非NUMA系统: 上述几种形式字段的大小以及偏移每个架构都有不同,内核种对每个字段都提供了PGOFF宏,方便统一计算,宏定义位于...
#endif #ifdef CONFIG_TASK_XACCT /* Accumulated RSS usage: */ u64 acct_rss_mem1; /* Accumulated virtual memory usage: */ u64 acct_vm_mem1; /* stime + utime since last update: */ u64 acct_timexpd; #endif #ifdef CONFIG_CPUSETS /* Protected by ->alloc_lock: */ nodemask_t mems...
►mem_heap_allocator ►MEM_ROOT ►Mem_root_allocator ►Mem_root_array ►Mem_root_array_YY ►mem_root_collation_unordered_map ►mem_root_deque ►mem_root_unordered_map ►mem_root_unordered_multimap ►mem_root_unordered_set ►Member_actions ►Member_actions_handler ►Member_...
refcount_tusage; /* Per task flags (PF_*), defined further below: */ unsignedintflags; unsignedintptrace; #ifdef CONFIG_SMP structllist_nodewake_entry; inton_cpu; #ifdef CONFIG_THREAD_INFO_IN_TASK /* Current CPU: */ unsignedintcpu; ...
* exit the critical section); * * @dl_yielded tells if task gave up the CPU before consuming * all its available runtime during the last job. * * @dl_non_contending tells if the task is inactive while still * contributing to the active utilization. In other words, it ...
在Linux系统中, 进程在/linux/include/linux/sched.h 头文件中被定义为task_struct, 它是一个结构体, 一个它的实例化即为一个进程, task_struct由许多元素构成, 下面列举一些重要的元素进行分析。