diff options
| author | Laurent Bercot <ska-skaware@skarnet.org> | 2023-09-11 08:13:01 +0000 |
|---|---|---|
| committer | Laurent Bercot <ska@appnovation.com> | 2023-09-11 08:13:01 +0000 |
| commit | bc3863eaf3e4ae92eac8cd3ce0ca9dcb8915fc36 (patch) | |
| tree | 9c6d891677e1d48aa4219636bff1c103d9509a7d /doc/libs6/s6lockd-helper.html | |
| parent | ddc088fba6016ae839afaa208b0a441869dc936f (diff) | |
| download | s6-bc3863eaf3e4ae92eac8cd3ce0ca9dcb8915fc36.tar.gz | |
Better s6-setlock; delete the s6lock subsystem
Signed-off-by: Laurent Bercot <ska@appnovation.com>
Diffstat (limited to 'doc/libs6/s6lockd-helper.html')
| -rw-r--r-- | doc/libs6/s6lockd-helper.html | 56 |
1 files changed, 0 insertions, 56 deletions
diff --git a/doc/libs6/s6lockd-helper.html b/doc/libs6/s6lockd-helper.html deleted file mode 100644 index bc3d1a5..0000000 --- a/doc/libs6/s6lockd-helper.html +++ /dev/null @@ -1,56 +0,0 @@ -<html> - <head> - <meta name="viewport" content="width=device-width, initial-scale=1.0" /> - <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> - <meta http-equiv="Content-Language" content="en" /> - <title>s6: the s6lockd-helper internal program</title> - <meta name="Description" content="s6: the s6lockd-helper internal program" /> - <meta name="Keywords" content="s6 s6lockd-helper lockd asynchronous timed lock daemon helper" /> - <!-- <link rel="stylesheet" type="text/css" href="//skarnet.org/default.css" /> --> - </head> -<body> - -<p> -<a href="index.html">libs6</a><br /> -<a href="../">s6</a><br /> -<a href="//skarnet.org/software/">Software</a><br /> -<a href="//skarnet.org/">skarnet.org</a> -</p> - -<h1> The <tt>s6lockd-helper</tt> program </h1> - -<p> -<tt>s6lockd-helper</tt> is a helper program for the s6lock daemon. -It just acquires a lock and holds it until it is killed or told to -exit by its parent daemon. -</p> - -<h2> Interface </h2> - -<p> - s6lockd-helper is not meant to be invoked directly by the user: -it will be spawned by the -<a href="s6lockd.html">s6lockd</a> program. -</p> - -<h2> Notes </h2> - -<ul> - <li> s6lockd-helper blocks on lock acquisition until it succeeds. It then -notifies its parent. It exits when its parent tells him to (i.e. when the -client asks for lock release). During the lock acquisition phase, it can -be killed if its parent detects a timeout. </li> - <li> One s6lockd-helper process per lock is the only way (apart from -threads) to implement timed lock acquisition. This can lead to a lot of -s6lockd-helper processes, but this is not a problem: - <ul> - <li> Processes are not a scarce resource. Today's schedulers work in O(1), -or in O(a function of the number of runnable processes), which means that a -sleeping process takes no scheduling time at all </li> - <li> s6lockd-helper is extremely tiny. Every instance should use up at -most one or two pages of non-sharable memory. </li> - </ul> </li> -</ul> - -</body> -</html> |