centos man page for unmap_mapping_range

Query: unmap_mapping_range

OS: centos

Section: 9

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

UNMAP_MAPPING_RANGE(9)					    Memory Management in Linux					    UNMAP_MAPPING_RANGE(9)

NAME
unmap_mapping_range - unmap the portion of all mmaps in the specified address_space corresponding to the specified page range in the underlying file.
SYNOPSIS
void unmap_mapping_range(struct address_space * mapping, loff_t const holebegin, loff_t const holelen, int even_cows);
ARGUMENTS
mapping the address space containing mmaps to be unmapped. holebegin byte in first page to unmap, relative to the start of the underlying file. This will be rounded down to a PAGE_SIZE boundary. Note that this is different from truncate_pagecache, which must keep the partial page. In contrast, we must get rid of partial pages. holelen size of prospective hole in bytes. This will be rounded up to a PAGE_SIZE boundary. A holelen of zero truncates to the end of the file. even_cows 1 when truncating a file, unmap even private COWed pages; but 0 when invalidating pagecache, don't throw away private data.
COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 UNMAP_MAPPING_RANGE(9)
Related Man Pages
mmap(2) - redhat
mincore(2) - linux
write_cache_pages(9) - centos
mincore(2) - centos
munmap(2) - hpux
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