From fb4da167114e96d7f20ef97474f976f8ffa604e7 Mon Sep 17 00:00:00 2001 From: Denys Vlasenko Date: Tue, 22 Nov 2016 23:14:24 +0100 Subject: Split miscutils/Config.src items into miscutils/*.c files Signed-off-by: Denys Vlasenko --- miscutils/readahead.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'miscutils/readahead.c') diff --git a/miscutils/readahead.c b/miscutils/readahead.c index e22aaa468..0b502f88c 100644 --- a/miscutils/readahead.c +++ b/miscutils/readahead.c @@ -9,6 +9,23 @@ * * Licensed under GPLv2 or later, see file LICENSE in this source tree. */ +//config:config READAHEAD +//config: bool "readahead" +//config: default y +//config: depends on LFS +//config: select PLATFORM_LINUX +//config: help +//config: Preload the files listed on the command line into RAM cache so that +//config: subsequent reads on these files will not block on disk I/O. +//config: +//config: This applet just calls the readahead(2) system call on each file. +//config: It is mainly useful in system startup scripts to preload files +//config: or executables before they are used. When used at the right time +//config: (in particular when a CPU bound process is running) it can +//config: significantly speed up system startup. +//config: +//config: As readahead(2) blocks until each file has been read, it is best to +//config: run this applet as a background job. //usage:#define readahead_trivial_usage //usage: "[FILE]..." -- cgit v1.2.3-55-g6feb