'\" t
.\"     Title: synchronize_rcu_expedited
.\"    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: Driver Basics
.\"    Source: Kernel Hackers Manual 3.16.56
.\"  Language: English
.\"
.TH "SYNCHRONIZE_RCU_EXPE" "9" "May 2018" "Kernel Hackers Manual 3\&.16\&" "Driver Basics"
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.SH "NAME"
synchronize_rcu_expedited \- Brute\-force RCU grace period
.SH "SYNOPSIS"
.HP \w'void\ synchronize_rcu_expedited('u
.BI "void synchronize_rcu_expedited(" "void" ");"
.SH "ARGUMENTS"
.PP
\fIvoid\fR
.RS 4
no arguments
.RE
.SH "DESCRIPTION"
.PP
.PP
Wait for an RCU\-preempt grace period, but expedite it\&. The basic idea is to invoke
\fBsynchronize_sched_expedited\fR
to push all the tasks to the \->blkd_tasks lists and wait for this list to drain\&. This consumes significant time on all CPUs and is unfriendly to real\-time workloads, so is thus not recommended for any sort of common\-case code\&. In fact, if you are using
\fBsynchronize_rcu_expedited\fR
in a loop, please restructure your code to batch your updates, and then Use a single
\fBsynchronize_rcu\fR
instead\&.
.PP
Note that it is illegal to call this function while holding any lock that is acquired by a CPU\-hotplug notifier\&. And yes, it is also illegal to call this function from a CPU\-hotplug notifier\&. Failing to observe these restriction will result in deadlock\&.
.SH "COPYRIGHT"
.br