__purge_vmap_area_lazy

Name:Purges all lazily-freed vmap areas.

Proto:static bool __purge_vmap_area_lazy(unsigned long start, unsigned long end)

Type:bool

Parameter:

Type	Parameter	Name
unsigned long	start
unsigned long	end

1280

lockdep_assert_held( & Serialize vmap purging. There is no actual criticial section protected* by this look, but we want to avoid concurrent calls for performance* reasons and to make the pcpu_get_vm_areas more deterministic.)

1282

valist = llist_del_all - delete all entries from lock-less list*@head: the head of lock-less list to delete all entries* If list is empty, return NULL, otherwise, delete all entries and* return the pointer to the first entry. The order of entries

1283

If Value for the false possibility is greater at compile time(valist == NULL) Then Return false

1290

Implement a stub for vmalloc_sync_all() if the architecture chose not to* have one.* The purpose of this function is to make sure the vmalloc area* mappings are identical in all page-tables in the system.

1297

If va_start < start Then start = va_start

1299

If va_end > end Then end = va_end

1303

flush_tlb_kernel_range(start, end)

1304

resched_threshold = lazy_max_pages() << 1

1306

spin_lock( & free_vmap_area_lock)

1308

nr = va_end - va_start >> PAGE_SHIFT determines the page size

1309

orig_start = va_start

1310

orig_end = va_end

1317

va = Merge de-allocated chunk of VA memory with previous* and next free blocks. If coalesce is not done a new* free area is inserted. If VA has been merged, it is* freed.

1320

If is_vmalloc_or_module_addr((void * )orig_start) Then kasan_release_vmalloc(orig_start, orig_end, va_start, va_end)

1324

atomic_long_sub(nr, & vmap_lazy_nr)

1326

If atomic_long_read( & vmap_lazy_nr) < resched_threshold Then cond_resched_lock( & free_vmap_area_lock)

1329

spin_unlock( & free_vmap_area_lock)

1330

Return true

**Caller**
Name	Describe
try_purge_vmap_area_lazy	Kick off a purge of the outstanding lazy areas. Don't bother if somebody* is already purging.
purge_vmap_area_lazy
_vm_unmap_aliases

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