centos man page for vm_unmap_aliases

Query: vm_unmap_aliases

OS: centos

Section: 9

Format: Original Unix Latex Style Formatted with HTML and a Horizontal Scroll Bar

VM_UNMAP_ALIASES(9)					    Memory Management in Linux					       VM_UNMAP_ALIASES(9)

NAME
vm_unmap_aliases - unmap outstanding lazy aliases in the vmap layer
SYNOPSIS
void vm_unmap_aliases(void);
ARGUMENTS
void no arguments
DESCRIPTION
The vmap/vmalloc layer lazily flushes kernel virtual mappings primarily to amortize TLB flushing overheads. What this means is that any page you have now, may, in a former life, have been mapped into kernel virtual address by the vmap layer and so there might be some CPUs with TLB entries still referencing that page (additional to the regular 1:1 kernel mapping). vm_unmap_aliases flushes all such lazy mappings. After it returns, we can be sure that none of the pages we have control over will have any aliases from the vmap layer.
COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 VM_UNMAP_ALIASES(9)
Related Man Pages
sf_buf(9) - debian
sf_buf_alloc(9) - debian
sf_buf_free(9) - debian
mount_overlay(8) - netbsd
sf_buf_page(9) - freebsd
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