[lxc-devel] [lxd/master] Clarify unsquashfs limit logic

stgraber on Github lxc-bot at linuxcontainers.org
Thu Sep 15 21:53:03 UTC 2016


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From 74782d8944734125f44038ef811f8bc302d42b3f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?St=C3=A9phane=20Graber?= <stgraber at ubuntu.com>
Date: Thu, 15 Sep 2016 17:52:27 -0400
Subject: [PATCH] Clarify unsquashfs limit logic
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Signed-off-by: Stéphane Graber <stgraber at ubuntu.com>
---
 lxd/images.go | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lxd/images.go b/lxd/images.go
index 70b33e6..66ea2ba 100644
--- a/lxd/images.go
+++ b/lxd/images.go
@@ -100,6 +100,8 @@ func unpack(file string, path string) error {
 		command = "unsquashfs"
 		args = append(args, "-f", "-d", path, "-n")
 
+		// Limit unsquashfs chunk size to 10% of memory and up to 256MB (default)
+		// When running on a low memory system, also disable multi-processing
 		mem, err := deviceTotalMemory()
 		mem = mem / 1024 / 1024 / 10
 		if err == nil && mem < 256 {


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