Live Patches

fedora

Tools

• dnf -y install git make

Clone kpatch

• git clone https://github.com/dynup/kpatch

Alles was gebraucht wird, wird installiert

• make dependencies
• cat meminfo-string.patch

Der Patch

Index: src/fs/proc/meminfo.c
===================================================================
--- src.orig/fs/proc/meminfo.c
+++ src/fs/proc/meminfo.c
@@ -95,7 +95,7 @@ static int meminfo_proc_show(struct seq_
 		"Committed_AS:   %8lu kB\n"
 		"VmallocTotal:   %8lu kB\n"
 		"VmallocUsed:    %8lu kB\n"
-		"VmallocChunk:   %8lu kB\n"
+		"VMALLOCCHUNK:   %8lu kB\n"
 #ifdef CONFIG_MEMORY_FAILURE
 		"HardwareCorrupted: %5lu kB\n"
 #endif

Patch kompilieren

• kpatch-build meminfo-string.patch

Fedora distribution detected
Downloading kernel source for 6.2.9-300.fc38.x86_64

Kontrolle

• grep -i chunk /proc/meminfo

sollte was anderes stehen VMALLOCCHUNK:   34359337092 kB

Patch laden

• kpatch load kpatch-meminfo-string.ko

loading patch module: livepatch-meminfo-string.ko

Patch hat gezogen

• grep -i chunk /proc/meminfo

VMALLOCCHUNK:   34359337092 kB