'\" t
.\"     Title: truncate_pagecache
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: January 2017
.\"    Manual: Memory Management in Linux
.\"    Source: Kernel Hackers Manual 4.8.15
.\"  Language: English
.\"
.TH "TRUNCATE_PAGECACHE" "9" "January 2017" "Kernel Hackers Manual 4\&.8\&." "Memory Management in Linux"
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.SH "NAME"
truncate_pagecache \- unmap and remove pagecache that has been truncated
.SH "SYNOPSIS"
.HP \w'void\ truncate_pagecache('u
.BI "void truncate_pagecache(struct\ inode\ *\ " "inode" ", loff_t\ " "newsize" ");"
.SH "ARGUMENTS"
.PP
\fIinode\fR
.RS 4
inode
.RE
.PP
\fInewsize\fR
.RS 4
new file size
.RE
.SH "DESCRIPTION"
.PP
inode\*(Aqs new i_size must already be written before truncate_pagecache is called\&.
.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