'\" t
.\"     Title: truncate_pagecache_range
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
.\"      Date: May 2018
.\"    Manual: Memory Management in Linux
.\"    Source: Kernel Hackers Manual 3.16.56
.\"  Language: English
.\"
.TH "TRUNCATE_PAGECACHE_R" "9" "May 2018" "Kernel Hackers Manual 3\&.16\&" "Memory Management in Linux"
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.SH "NAME"
truncate_pagecache_range \- unmap and remove pagecache that is hole\-punched
.SH "SYNOPSIS"
.HP \w'void\ truncate_pagecache_range('u
.BI "void truncate_pagecache_range(struct\ inode\ *\ " "inode" ", loff_t\ " "lstart" ", loff_t\ " "lend" ");"
.SH "ARGUMENTS"
.PP
\fIinode\fR
.RS 4
inode
.RE
.PP
\fIlstart\fR
.RS 4
offset of beginning of hole
.RE
.PP
\fIlend\fR
.RS 4
offset of last byte of hole
.RE
.SH "DESCRIPTION"
.PP
This function should typically be called before the filesystem releases resources associated with the freed range (eg\&. deallocates blocks)\&. This way, pagecache will always stay logically coherent with on\-disk format, and the filesystem would not have to deal with situations such as writepage being called for a page that has already had its underlying blocks deallocated\&.
.SH "COPYRIGHT"
.br