prepare_kswapd

Name:Prepare kswapd for sleeping. This verifies that there are no processes* waiting in throttle_direct_reclaim() and that watermarks have been met.* Returns true if kswapd is ready to sleep

Proto:static bool prepare_kswapd_sleep(pg_data_t *pgdat, int order, int classzone_idx)

Type:bool

Parameter:

Type	Parameter	Name
pg_data_t *	pgdat
int	order
int	classzone_idx

3499

If waitqueue_active -- locklessly test for waiters on the queue*@wq_head: the waitqueue to test for waiters* returns true if the wait list is not empty* NOTE: this function is lockless and requires care, incorrect usage _will_ Then wake_up_all( & pfmemalloc_wait)

3503

If Number of 'reclaimed == 0' runs >= Maximum number of reclaim retries without progress before the OOM* killer is consider the only way forward. Then Return true

3506

If Returns true if there is an eligible zone balanced for the request order* and classzone_idx Then

3507

Clear pgdat state for congested, dirty or under writeback.

3508

Return true

3511

Return false

**Caller**
Name	Describe
kswapd_try_to_sleep

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Function report