[SCM] wiki-content branch, master, updated. f34daeb4689ad6af5204f483e198b58c9175b3e9

[Michal Suchanek]

The following commit has been merged in the master branch:
commit f34daeb4689ad6af5204f483e198b58c9175b3e9
Author: Michal Suchanek <hramrach at centrum.cz>
Date:   Thu Apr 21 13:15:42 2011 +0200

    Add overlayfs guide.

diff --git a/devel/rfc.mdwn b/devel/rfc.mdwn
index 6b35c1b..dc769fb 100644
--- a/devel/rfc.mdwn
+++ b/devel/rfc.mdwn
@@ -5,6 +5,7 @@
   * [[multifs]]
   * [[multiarch]]
   * [[unionmount]]
+  * [[overlayfs]]
   * [[tmpfs]]
   * [[package validation]]
   * [[lxc]]
diff --git a/devel/rfc/overlayfs.mdwn b/devel/rfc/overlayfs.mdwn
new file mode 100644
index 0000000..a8a4a49
--- /dev/null
+++ b/devel/rfc/overlayfs.mdwn
@@ -0,0 +1,29 @@
+## To build debian-live with overlayfs you will need
+
+  * A [patch](http://paste.debian.net/plain/114723) for live-boot until applied upstream
+
+  * A linux kernel with overlayfs support
+    - Get a kernel from [Miklos Szeredi's git repo](http://git.kernel.org/?p=linux/kernel/git/mszeredi/vfs.git;a=shortlog;h=refs/heads/overlayfs.v8). This is a work in progress but using this kernel you should be able to boot Debian Live. You can check the repo for more up-to-date branches.
+    - Configure and build the kernel.
+
+    CONFIG_TMPFS_XATTR=y
+
+    CONFIG_OVERLAYFS_FS=m
+
+
+    make-kpkg --rootcmd fakeroot --initrd --append-to-version -ovfs-i686 kernel-image kernel-headers
+
+   - Unfortunately kernel-package and initramfs-tools package maintainers can't agree on a way to tell initramfs-tools to generate an initramfs so you will need to generate one in a [hook](../zzz-initramfs.sh) (put in chroot_local-hooks). Also cross-building i686 on amd64 seems broken.
+
+
+  * Tell live-initramfs to use overlayfs instead of aufs
+     - Use some arguments like these with lb config
+
+    -k ovfs-i686+ \
+
+    --bootappend-live union=overlayfs \
+
+    --packages "httpfs2 less open-iscsi links2" \
+
+    --linux-packages linux-image-2.6.39-rc3 \
+

-- 
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