From 3957d72f9cd613fa8a0eeb03517e4f78f9cc58f1 Mon Sep 17 00:00:00 2001 From: Brian Goff Date: Tue, 8 Jul 2014 21:47:55 -0400 Subject: [PATCH] Add cgroups freezer info Docker-DCO-1.1-Signed-off-by: Brian Goff (github: cpuguy83) Docker-DCO-1.1-Signed-off-by: Brian Goff (github: SvenDowideit) --- docs/sources/reference/commandline/cli.md | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/docs/sources/reference/commandline/cli.md b/docs/sources/reference/commandline/cli.md index e31e3eee45..d75f2b1443 100644 --- a/docs/sources/reference/commandline/cli.md +++ b/docs/sources/reference/commandline/cli.md @@ -764,7 +764,14 @@ log entry. Usage: docker pause CONTAINER - Pause all processes within a container + Pause uses the cgroups freezer to suspend all processes in a container. + Traditionally when suspending a process the SIGSTOP signal is used, + which is observable by the process being suspended. With the cgroups freezer + the process is unaware, and unable to capture, that it is being suspended, + and subsequently resumed. + + For for information on the cgroups freezer see: + https://www.kernel.org/doc/Documentation/cgroups/freezer-subsystem.txt ## ps @@ -1273,7 +1280,7 @@ them to [*Share Images via Repositories*]( Usage: docker unpause CONTAINER - Pause all processes within a container + Resumes a paused container. ## version