---
name: "synchronize_rcu"
section: "9"
platform: "linux"
package: "linux-manual-3.16"
version: "3.16.56-1+deb8u1"
release: "Debian 8 (Jessie)"
platforms: ["linux"]
url: "https://new.carta.tech/synchronize_rcu"
---

# synchronize\_rcu(9)

wait until a grace period has elapsed.

## NAME

synchronize\_rcu - wait until a grace period has elapsed.

## SYNOPSIS

**void synchronize\_rcu(***void***);**

## ARGUMENTS

*void*

no arguments

## DESCRIPTION

Control will return to the caller some time after a full grace period has elapsed, in other words after all currently executing RCU read-side critical sections have completed. Note, however, that upon return from **synchronize\_rcu**, the caller might well be executing concurrently with new RCU read-side critical sections that began while **synchronize\_rcu** was waiting. RCU read-side critical sections are delimited by **rcu\_read\_lock** and **rcu\_read\_unlock**, and may be nested.

See the description of **synchronize\_sched** for more detailed information on memory ordering guarantees.

## COPYRIGHT