khugepaged_do_scan

Name:khugepaged_do_scan

Proto:static void khugepaged_do_scan(void)

Type:void

Parameter:Nothing

2062

struct page * hpage = NULL

2063

progress = 0 , pass_through_head = 0

2064

pages = default scan 8*512 pte (or vmas) every 30 second

2065

bool wait = true

2067

The "volatile" is due to gcc bugs ()

2069

When progress < pages cycle

2070

If Not khugepaged_prealloc_page( & hpage, & wait) Then Break

2073

2075

If Value for the false possibility is greater at compile time(kthread_should_stop - should this kthread return now?* When someone calls kthread_stop() on your kthread, it will be woken* and this will return true. You should then return, and your return* value will be passed through to kthread_stop(). || try_to_freeze()) Then Break

2078

spin_lock( & khugepaged_mm_lock)

2079

If Not mm_slot Then pass_through_head++

2081

If khugepaged_has_work() && pass_through_head < 2 Then progress += khugepaged_scan_mm_slot(pages - progress, & hpage)

2085

Else progress = pages

2087

spin_unlock( & khugepaged_mm_lock)

2090

If Not IS_ERR_OR_NULL(hpage) Then Perform a free_page(), also freeing any swap cache associated with* this page if it is the last user of the page.

**Caller**
Name	Describe
khugepaged

Source code conversion tool public plug-in interface	X
Support c/c++/esqlc/java Oracle/Informix/Mysql Plug-in can realize: logical Report Code generation and batch code conversion