domain_dirty

函数名称：domain_dirty_limits - calculate thresh and bg_thresh for a wb_domain*@dtc: dirty_throttle_control of interest* Calculate @dtc->thresh and ->bg_thresh considering* vm_dirty_{bytes|ratio} and dirty_background_{bytes|ratio}. The caller

函数原型：static void domain_dirty_limits(struct dirty_throttle_control *dtc)

返回类型：void

参数：

类型	参数	名称
struct dirty_throttle_control *	dtc

395

available_memory等于dirtyable

396

gdtc等于mdtc_gdtc(dtc)

397

bytes等于vm_dirty_bytes starts at 0 (disabled) so that it is a function of* vm_dirty_ratio * the amount of dirtyable memory

398

bg_bytes等于dirty_background_bytes starts at 0 (disabled) so that it is a function of* dirty_background_ratio * the amount of dirtyable memory

400

ratio等于The generator of dirty data starts writeback at this percentage乘PAGE_SIZE除100

401

bg_ratio等于Start background writeback (via writeback threads) at this percentage乘PAGE_SIZE除100

407

如果gdtc则

408

global_avail等于dirtyable

417

如果bytes则ratio等于两数取小(DIV_ROUND_UP(bytes, global_avail), PAGE_SIZE)

420

如果bg_bytes则bg_ratio等于两数取小(DIV_ROUND_UP(bg_bytes, global_avail), PAGE_SIZE)

423

bytes等于bg_bytes等于0

426

如果bytes则thresh等于DIV_ROUND_UP(bytes, PAGE_SIZE)

428

否则thresh等于ratio乘available_memory除PAGE_SIZE

431

如果bg_bytes则bg_thresh等于DIV_ROUND_UP(bg_bytes, PAGE_SIZE)

433

否则bg_thresh等于bg_ratio乘available_memory除PAGE_SIZE

436

如果bg_thresh大于等于thresh则bg_thresh等于thresh除2

438

tsk等于当前进程

439

如果flags按位与Throttle me less: I clean memory 或rt_task(tsk)则

440

bg_thresh加等于bg_thresh除4加dirty_limit除32

441

thresh加等于thresh除4加dirty_limit除32

443

dirty threshold 等于thresh

444

dirty background threshold 等于bg_thresh

447

如果非gdtc则trace_global_dirty_state(bg_thresh, thresh)

**调用者**
名称	描述
global_dirty_limits	global_dirty_limits - background-writeback and dirty-throttling thresholds@pbackground: out parameter for bg_thresh@pdirty: out parameter for thresh* Calculate bg_thresh and thresh for global_wb_domain. See* domain_dirty_limits() for details.
balance_dirty_pages	alance_dirty_pages() must be called by processes which are generating dirty* data
wb_over_bg_thresh	wb_over_bg_thresh - does @wb need to be written back?@wb: bdi_writeback of interest Determines whether background writeback should keep writing @wb or it's* clean enough.* Return: %true if writeback should continue.

源代码转换工具开放的插件接口	X
支持：c/c++/esqlc/java Oracle/Informix/Mysql 插件可实现：逻辑报告代码生成和批量转换代码

函数逻辑报告