Messages in this thread | | | From | Al Boldi <> | Subject | Re: patch for Documentation/initrd.txt? | Date | Thu, 27 Jul 2006 20:26:57 +0300 |
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Tom Horsley wrote: > > I spend hours the other day trying to examine a fedora core 5 > initrd file in the mistaken belief that the Documentation/initrd.txt > file might contain relevant information :-). It didn't, but > many web searches later I finally discovered the new key > to decrypting initrd files. Would it be possible to add the > attached patch (or a better one if someone can explain things > in more detail) to the initrd.txt file to avoid future > confusion? Thanks. > > ["initrd-doc-patch" (initrd-doc-patch)] > > --- linux-2.6.17.7/Documentation/initrd.txt 2006-07-27 > 08:49:30.000000000 -0400 +++ linux-2.6.17.7/Documentation/initrd.txt > 2006-07-27 09:02:04.000000000 -0400 @@ -73,6 +73,22 @@ > 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 > ------------
Thanks for your very useful docPatch!
OT, but your docPatch made me think of another way to init the kernel; via tmpfs, i.e. initTmpFS.
Can anybody see how that could be useful?
Thanks!
-- Al
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