[bootlin/training-materials updates] master: slides/kernel-driver-development-memory: Mention mlock[all] (3301b440)
Miquel Raynal
miquel.raynal at bootlin.com
Fri Mar 24 18:46:37 CET 2023
Repository : https://github.com/bootlin/training-materials
On branch : master
Link : https://github.com/bootlin/training-materials/commit/3301b4400d7ae09c5985d954414a9b190f665d4c
>---------------------------------------------------------------
commit 3301b4400d7ae09c5985d954414a9b190f665d4c
Author: Miquel Raynal <miquel.raynal at bootlin.com>
Date: Tue Mar 21 13:06:32 2023 +0100
slides/kernel-driver-development-memory: Mention mlock[all]
Signed-off-by: Miquel Raynal <miquel.raynal at bootlin.com>
>---------------------------------------------------------------
3301b4400d7ae09c5985d954414a9b190f665d4c
.../kernel-driver-development-memory.tex | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/slides/kernel-driver-development-memory/kernel-driver-development-memory.tex b/slides/kernel-driver-development-memory/kernel-driver-development-memory.tex
index f75264e9..3edf128e 100644
--- a/slides/kernel-driver-development-memory/kernel-driver-development-memory.tex
+++ b/slides/kernel-driver-development-memory/kernel-driver-development-memory.tex
@@ -81,7 +81,11 @@
\end{itemize}
\item User space memory allocation is allowed to over-commit memory
(more than available physical memory) $\Rightarrow$ can lead to
- out of memory
+ out of memory situations.
+ \begin{itemize}
+ \item Can be prevented with the \code{mlock}/\code{mlockall} system
+ calls.
+ \end{itemize}
\item OOM killer kicks in and selects a process to kill to retrieve
some memory. That's better than letting the system freeze.
\end{itemize}
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