'\" t
.\"     Title: inode_congested
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: March 2017
.\"    Manual: The Linux VFS
.\"    Source: Kernel Hackers Manual 4.10.7
.\"  Language: English
.\"
.TH "INODE_CONGESTED" "9" "March 2017" "Kernel Hackers Manual 4\&.10\&" "The Linux VFS"
.\" -----------------------------------------------------------------
.\" * Define some portability stuff
.\" -----------------------------------------------------------------
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.\" http://bugs.debian.org/507673
.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.ie \n(.g .ds Aq \(aq
.el       .ds Aq '
.\" -----------------------------------------------------------------
.\" * set default formatting
.\" -----------------------------------------------------------------
.\" disable hyphenation
.nh
.\" disable justification (adjust text to left margin only)
.ad l
.\" -----------------------------------------------------------------
.\" * MAIN CONTENT STARTS HERE *
.\" -----------------------------------------------------------------
.SH "NAME"
inode_congested \- test whether an inode is congested
.SH "SYNOPSIS"
.HP \w'int\ inode_congested('u
.BI "int inode_congested(struct\ inode\ *\ " "inode" ", int\ " "cong_bits" ");"
.SH "ARGUMENTS"
.PP
\fIinode\fR
.RS 4
inode to test for congestion (may be NULL)
.RE
.PP
\fIcong_bits\fR
.RS 4
mask of WB_[a]sync_congested bits to test
.RE
.SH "DESCRIPTION"
.PP
Tests whether
\fIinode\fR
is congested\&.
\fIcong_bits\fR
is the mask of congestion bits to test and the return value is the mask of set bits\&.
.PP
If cgroup writeback is enabled for
\fIinode\fR, the congestion state is determined by whether the cgwb (cgroup bdi_writeback) for the blkcg associated with
\fIinode\fR
is congested; otherwise, the root wb\*(Aqs congestion state is used\&.
.PP
\fIinode\fR
is allowed to be NULL as this function is often called on mapping\->host which is NULL for the swapper space\&.
.SH "COPYRIGHT"
.br