slackware-current/README.initrd
Patrick J Volkerding ce9883adca Thu Sep 6 06:15:46 UTC 2018
a/acpid-2.0.30-x86_64-1.txz:  Upgraded.
a/etc-15.0-x86_64-9.txz:  Rebuilt.
  Added support for /etc/ld.so.conf.d/. Thanks to Qury.
a/kernel-firmware-20180904_85c5d90-noarch-1.txz:  Upgraded.
a/kernel-generic-4.14.68-x86_64-1.txz:  Upgraded.
a/kernel-huge-4.14.68-x86_64-1.txz:  Upgraded.
a/kernel-modules-4.14.68-x86_64-1.txz:  Upgraded.
a/pkgtools-15.0-noarch-22.txz:  Rebuilt.
  installpkg: prevent noise from the "stray cat" if tar hands it a broken
  pipe. Thanks to ivandi.
  Also (in the comments) provide a possibly better but untested solution.
  Thanks to SeB.
a/sysvinit-2.90-x86_64-2.txz:  Rebuilt.
  sysvinit-2.90 added an undocumented feature that tries to spawn agetty
  if it sees console= in the kernel command line. Avoiding the debate about
  whether this code belongs in init at all, at least such a change should
  be documented, and probably made opt-in. This patch disables the new
  behavior unless "sysvinit_agetty" is also seen in the kernel command line.
  It seems like this might have been something added for Hurd, and it might
  be wise to stick to what we've got rather than following upstream on this
  particular package. If anyone notices any other odd behavior, please let
  me know. Thanks to shastah.
a/sysvinit-scripts-2.1-noarch-19.txz:  Rebuilt.
  When checking for intel_pstate, direct the stderr to /dev/null in case
  the file doesn't exist in /sys. Thanks to ivandi.
  Allow forcing an option by editing /etc/default/cpufreq.
ap/cups-filters-1.21.2-x86_64-1.txz:  Upgraded.
ap/ghostscript-9.24-x86_64-1.txz:  Upgraded.
  Patched multiple -dSAFER sandbox bypass vulnerabilities.
  Thanks to Tavis Ormandy.
  For more information, see:
    https://www.ghostscript.com/doc/9.24/News.htm
    https://www.kb.cert.org/vuls/id/332928
  (* Security fix *)
ap/sudo-1.8.25-x86_64-1.txz:  Upgraded.
d/binutils-2.31.1-x86_64-2.txz:  Rebuilt.
  elf.c (_bfd_elf_get_symbol_version_string): Return _("<corrupt>") for
  corrupt symbol version info.
  elflink.c (bfd_elf_record_link_assignment): Always clear h->verinfo.verdef
  when overriding a dynamic definition.
  Thanks to Michael Short for pointing out the upstream patches.
d/ccache-3.4.3-x86_64-1.txz:  Upgraded.
d/kernel-headers-4.14.68-x86-1.txz:  Upgraded.
d/llvm-6.0.1-x86_64-2.txz:  Rebuilt.
  Recompiled with -DCLANG_BUILD_SHARED_LIBS=ON to fix issues when multiple
  OpenCL drivers are installed. Thanks to Heinz Wiesinger.
d/mercurial-4.7.1-x86_64-1.txz:  Upgraded.
k/kernel-source-4.14.68-noarch-1.txz:  Upgraded.
l/mozilla-nss-3.39-x86_64-1.txz:  Upgraded.
n/curl-7.61.1-x86_64-1.txz:  Upgraded.
  This update fixes an NTLM password overflow via integer overflow.
  For more information, see:
    https://curl.haxx.se/docs/CVE-2018-14618.html
    https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-14618
  (* Security fix *)
n/gnupg2-2.2.10-x86_64-1.txz:  Upgraded.
n/libtirpc-1.1.4-x86_64-1.txz:  Upgraded.
n/netatalk-3.1.11-x86_64-2.txz:  Rebuilt.
  rc.atalk: fixed errors in status output. Thanks to marav.
n/nghttp2-1.33.0-x86_64-1.txz:  Upgraded.
n/p11-kit-0.23.14-x86_64-1.txz:  Upgraded.
n/stunnel-5.49-x86_64-1.txz:  Upgraded.
x/libdrm-2.4.94-x86_64-1.txz:  Upgraded.
x/xf86-video-ati-20180824_de88ea27-x86_64-1.txz:  Upgraded.
xap/hexchat-2.14.2-x86_64-1.txz:  Upgraded.
xap/mozilla-firefox-60.2.0esr-x86_64-1.txz:  Upgraded.
  This release contains security fixes and improvements.
  For more information, see:
    https://www.mozilla.org/security/known-vulnerabilities/firefoxESR.html
  (* Security fix *)
xap/xlockmore-5.56-x86_64-1.txz:  Upgraded.
isolinux/initrd.img:  Rebuilt.
kernels/*:  Upgraded.
usb-and-pxe-installers/usbboot.img:  Rebuilt.
2018-09-06 18:00:33 +02:00

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Slackware initrd mini HOWTO
by Patrick Volkerding, volkerdi@slackware.com
Thu Sep 6 04:52:21 UTC 2018
This document describes how to create and install an initrd, which may be
required to use the 4.x kernel. Also see "man mkinitrd".
1. What is an initrd?
2. Why to I need an initrd?
3. How do I build the initrd?
4. Now that I've built an initrd, how do I use it?
1. What is an initrd?
Initrd stands for "initial ramdisk". An initial ramdisk is a very small
Linux filesystem that is loaded into RAM and mounted as the kernel boots,
and before the main root filesystem is mounted.
2. Why do I need an initrd?
The usual reason to use an initrd is because you need to load kernel
modules before mounting the root partition. Usually these modules are
required to support the filesystem used by the root partition (ext3, ext4,
btrfs, xfs), or perhaps the controller that the hard drive is attached
to (SCSI, RAID, etc). Essentially, there are so many different options
available in modern Linux kernels that it isn't practical to try to ship
many different kernels to try to cover everyone's needs. It's a lot more
flexible to ship a generic kernel and a set of kernel modules for it.
3. How do I build the initrd?
The easiest way to make the initrd is to use the mkinitrd script included
in Slackware's mkinitrd package. We'll walk through the process of
upgrading to the generic 4.14.68 Linux kernel using the packages
found in Slackware's slackware/a/ directory.
First, make sure the kernel, kernel modules, and mkinitrd package are
installed (the current version numbers might be a little different, so
this is just an example):
installpkg kernel-generic-4.14.68-x86_64-1.txz
installpkg kernel-modules-4.14.68-x86_64-1.txz
installpkg mkinitrd-1.4.11-x86_64-8.txz
Change into the /boot directory:
cd /boot
Now you'll want to run "mkinitrd". I'm using ext4 for my root filesystem,
and since the disk controller requires no special support the ext4 module
will be the only one I need to load:
mkinitrd -c -k 4.14.68 -m ext4
This should do two things. First, it will create a directory
/boot/initrd-tree containing the initrd's filesystem. Then it will
create an initrd (/boot/initrd.gz) from this tree. If you wanted to,
you could make some additional changes in /boot/initrd-tree/ and
then run mkinitrd again without options to rebuild the image. That's
optional, though, and only advanced users will need to think about that.
Here's another example: Build an initrd image using Linux 4.14.68
kernel modules for a system with an ext4 root partition on /dev/sdb3:
mkinitrd -c -k 4.14.68 -m ext4 -f ext4 -r /dev/sdb3
4. Now that I've built an initrd, how do I use it?
Now that you've got an initrd (/boot/initrd.gz), you'll want to load
it along with the kernel at boot time. If you use LILO for your boot
loader you'll need to edit /etc/lilo.conf and add a line to load the
initrd. Here's an example section of lilo.conf showing how this is
done:
# Linux bootable partition config begins
image = /boot/vmlinuz-generic
initrd = /boot/initrd.gz
root = /dev/sda6
label = Slackware
read-only
# Linux bootable partition config ends
The initrd is loaded by the "initrd = /boot/initrd.gz" line.
Just add the line right below the line for the kernel image you use.
Save the file, and then run LILO again ('lilo' at the command line).
You'll need to run lilo every time you edit lilo.conf or rebuild the
initrd.
Other bootloaders such as syslinux also support the use of an initrd.
See the documentation for those programs for details on using an
initrd with them.
---------
Have fun!