_vm_unmap_aliases

Name:_vm_unmap_aliases

Proto:static void _vm_unmap_aliases(unsigned long start, unsigned long end, int flush)

Type:void

Parameter:

Type	Parameter	Name
unsigned long	start
unsigned long	end
int	flush

1707

If Value for the false possibility is greater at compile time(!vmap_initialized) Then Return

1710

1712

for_each_possible_cpu(cpu)

1713

vbq = per_cpu(Queue of free and dirty vmap blocks, for allocation and flushing purposes , cpu)

1716

_read_lock() - mark the beginning of an RCU read-side critical section* When synchronize_rcu() is invoked on one CPU while other CPUs* are within RCU read-side critical sections, then the* synchronize_rcu() is guaranteed to block until after all the other

1718

spin_lock( & lock)

1719

If dirty Then

1720

va_start = va_start

1723

s = va_start + (dirty_min << PAGE_SHIFT determines the page size )

1724

e = va_start + (< dirty range << PAGE_SHIFT determines the page size )

1726

start = min - return minimum of two values of the same or compatible types*@x: first value*@y: second value(s, start)

1727

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

1729

flush = 1

1731

spin_unlock( & lock)

1733

_read_unlock() - marks the end of an RCU read-side critical section.* In most situations, rcu_read_unlock() is immune from deadlock.* However, in kernels built with CONFIG_RCU_BOOST, rcu_read_unlock()

1736

mutex_lock( & 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.)

1737

r per-CPU blocks

1738

If Not Purges all lazily-freed vmap areas. && flush Then flush_tlb_kernel_range(start, end)

1740

mutex_unlock - release the mutex*@lock: the mutex to be released* Unlock a mutex that has been locked by this task previously.* This function must not be used in interrupt context. Unlocking* of a not locked mutex is not allowed.

**Caller**
Name	Describe
vm_unmap_aliases	vm_unmap_aliases - unmap outstanding lazy aliases in the vmap layer* The vmap/vmalloc layer lazily flushes kernel virtual mappings primarily* to amortize TLB flushing overheads
vm_remove_mappings	Handle removing and resetting vm mappings related to the vm_struct.

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