wakeup_kswapd

Name:A zone is low on free memory or too fragmented for high-order memory

Proto:void wakeup_kswapd(struct zone *zone, gfp_t gfp_flags, int order, enum zone_type classzone_idx)

Type:void

Parameter:

Type	Parameter	Name
struct zone *	zone
gfp_t	gfp_flags
int	order
enum zone_type	classzone_idx

3973

If Not Returns true if a zone has pages managed by the buddy allocator.* All the reclaim decisions have to use this function rather than* populated_zone(). If the whole zone is reserved then we can easily* end up with populated_zone() && !managed_zone(). Then Return

3976

If Not cpuset_zone_allowed(zone, gfp_flags) Then Return

3978

pgdat = zone_pgdat

3980

If kswapd_classzone_idx == MAX_NR_ZONES Then kswapd_classzone_idx = classzone_idx

3982

Else kswapd_classzone_idx = max - return maximum of two values of the same or compatible types*@x: first value*@y: second value(kswapd_classzone_idx, classzone_idx)

3985

kswapd_order = max - return maximum of two values of the same or compatible types*@x: first value*@y: second value(kswapd_order, order)

3986

If Not 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 Return

3990

If Number of 'reclaimed == 0' runs >= Maximum number of reclaim retries without progress before the OOM* killer is consider the only way forward. || Returns true if there is an eligible zone balanced for the request order* and classzone_idx && Not pgdat_watermark_boosted(pgdat, classzone_idx) Then

4000

If Not (gfp_flags & Caller can reclaim ) Then wakeup_kcompactd(pgdat, order, classzone_idx)

4002

Return

4005

trace_mm_vmscan_wakeup_kswapd(node_id, classzone_idx, order, gfp_flags)

4007

wake_up_interruptible( & kswapd_wait)

**Caller**
Name	Describe
rmqueue	Allocate a page from the given zone. Use pcplists for order-0 allocations.
wake_all_kswapds

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