X-Git-Url: http://git.agner.ch/gitweb/?a=blobdiff_plain;f=Documentation%2Finitrd.txt;h=15f1b35deb3410932fcf5d9ef7fad28f69080408;hb=4d389dcea8543161c3bb1e26f1c2ffb7e0822ff1;hp=b1b6440237a6ef82fa367fdc4560e7b6d3590eb2;hpb=075395d228641646159dae3dd170fa3fc6ff477a;p=linux-drm-fsl-dcu.git

diff --git a/Documentation/initrd.txt b/Documentation/initrd.txt
index b1b6440237a6..15f1b35deb34 100644
--- a/Documentation/initrd.txt
+++ b/Documentation/initrd.txt
@@ -72,6 +72,22 @@ initrd adds the following new options:
     initrd is mounted as root, and the normal boot procedure is followed,
     with the RAM disk still mounted as root.
 
+Compressed cpio images
+----------------------
+
+Recent kernels have support for populating a ramdisk from a compressed cpio
+archive, on such systems, the creation of a ramdisk image doesn't need to
+involve special block devices or loopbacks, you merely create a directory on
+disk with the desired initrd content, cd to that directory, and run (as an
+example):
+
+find . | cpio --quiet -c -o | gzip -9 -n > /boot/imagefile.img
+
+Examining the contents of an existing image file is just as simple:
+
+mkdir /tmp/imagefile
+cd /tmp/imagefile
+gzip -cd /boot/imagefile.img | cpio -imd --quiet
 
 Installation
 ------------