Difference between revisions of "Linux-pf"

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[[Category:Kernel]]
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#REDIRECT: [[kernels]]
{{Article summary start}}
 
{{Article summary text|'''Linux-pf and linux-pf-headers'''}}
 
* Current version: '''3.4.1-1'''
 
* Kernel version: ''3.4.1''
 
 
 
{{Article summary heading|Related}}
 
{{Article summary wiki|Tuxonice}}
 
[https://bitbucket.org/nous/linux-pf/ linux-pf mercurial repository]
 
 
 
[https://aur.archlinux.org/packages.php?ID=50956 AUR linux-pf page]
 
 
 
[http://pf.natalenko.name/ Patchset homepage]
 
 
 
[http://pf.natalenko.name/ Patchset community forum]
 
 
 
[http://freecode.com/projects/pf-kernel Patchset changelog]
 
 
 
[https://aur.archlinux.org/packages.php?ID=58913 iptables-pf]
 
{{Article summary end}}
 
 
 
[http://pf.natalenko.name/ Linux-pf] is a kernel package based on the stock -ARCH kernel, patched with a row of significant patches:
 
* [http://ck-hack.blogspot.com/ The latest Con Kolivas' -ck patchset, including BFS]
 
* [[TuxOnIce]]
 
* [http://algo.ing.unimo.it/people/paolo/disk_sched/ BFQ (as default I/O scheduler)]
 
* [http://aufs.sourceforge.net/ AUFS3]
 
* [http://www.linuximq.net/ LinuxIMQ]
 
* [http://l7-filter.clearfoundation.com/ l7-filter]
 
* [http://linux-vserver.org/Welcome_to_Linux-VServer.org Linux-VServer]
 
 
 
The reference PKGBUILD can be found at the [https://aur.archlinux.org/packages.php?ID=50956 AUR linux-pf page] and at the [https://bitbucket.org/nous/linux-pf bitbucket.org mercurial repository]. Precompiled packages, generic and CPU-family optimized are uploaded at the [http://dl.dropbox.com/u/11734958/index.html pfkernel unofficial repository], usually within 6 hours of the AUR update for x86_64 and 2 days for i686. Append the following to {{ic|/etc/pacman.conf}} to activate the pfkernel repo:
 
:{{bc|<nowiki>
 
[pfkernel]
 
# Generic and optimized binaries of the ARCH kernel patched with BFS, TuxOnIce, BFQ, IMQ, Aufs3
 
# linux-pf, kernel26-pf, gdm-old, nvidia-pf, nvidia-96xx, xchat-greek, arora-git
 
Server = http://dl.dropbox.com/u/11734958/$arch
 
</nowiki>}}
 
Running '''''pacman -Syyl pfkernel''''' will update all repos and show the available packages from pfkernel. Afterwards, installing linux-pf is as trivial as running '''''pacman -S linux-pf linux-pf-headers''''', but additional configuration steps must be performed; see the [[Linux-pf#Installation|Installation section]] below.
 
 
 
== Compilation ==
 
There's a number of options a user is asked to choose from, should he/she select to compile from the PKGBUILD:
 
::{{bc|<nowiki>
 
==> Hit <Y> to use your running kernel's config
 
    (needs IKCONFIG and IKCONFIG_PROC)
 
==> Hit <L> to run 'make localmodconfig'
 
==> Hit <N> (or just <ENTER>) to build an all-inclusive kernel like stock -ARCH
 
    (warning: it can take a looong time)
 
</nowiki>}}
 
The <Y> option is for users who have already compiled and are running a custom kernel. The PKGBUILD reads the running kernel's configuration and uses it for the subsequent compilation.
 
The <L> option tries some kind of autodetection of the user's hardware: it first tries to use the [[modprobed_db]] module database, then falls back to the linux kernel's '''''make localmodconfig''''' functionality. The last option is self-explanatory.
 
 
 
::{{bc|<nowiki>
 
==> Kernel configuration options before build:
 
    <M> make menuconfig (console menu)
 
    <N> make nconfig (newer alternative to menuconfig)
 
    <G> make gconfig (needs gtk)
 
    <X> make xconfig (needs qt)
 
    <O> make oldconfig
 
    <ENTER> to skip configuration and start compiling
 
</nowiki>}}
 
Choose one of these to use your favourite user interface for configuring the kernel. Note that the last option might still prompt with unresolved/new configuration options, if you have selected <Y> or <L> in the previous step.
 
 
 
::{{bc|<nowiki>
 
==> An non-generic CPU was selected for this kernel.
 
==> Hit <G>    :  to create a generic package named linux-pf
 
==> Hit <ENTER> :  to create a package named after the selected CPU
 
                  (e.g. linux-pf-core2 - recommended)
 
==> This option affects ONLY the package name. Whether or not the
 
==> kernel is optimized was determined at the previous config step.
 
</nowiki>}}
 
If you have selected a specific CPU optimization for your kernel in the previous step, the default action is to append the CPU to the package name. This way, a subsequent package update from the repository will pull the optimized package and not the generic one. This also will help better compatibility with 3rd party precompiled modules (e.g. nvidia-pf), which might break things if loaded on optimized linux-pf kernels.
 
 
 
== Installation ==
 
After the compilation finishes, an additional ''linux-pf-headers[-cpu]'' package will be created. Don't forget to install it too, if you plan on using additional modules like [[nvidia]] or [[virtualbox]].
 
{{bc|<nowiki>
 
$ sudo pacman -U linux-pf-core2-3.3.2-1-x86_64.pkg.tar.xz linux-pf-headers-core2-3.3.2-1-x86_64.pkg.tar.xz
 
</nowiki>}}
 
During the kernel installation, [[mkinitcpio]] will be called by the install script to recreate the initramfs.
 
{{Note|If you make any changes to {{ic|/etc/mkinitcpio.conf}} after the installation, you must run '''''mkinitcpio -p linux-pf''''' to have the initial ramdisk recreated.}}
 
 
 
Then, you need to add a boot entry in {{ic|/boot/grub/menu.lst}} (or {{ic|/boot/grub/grub.cfg}}) which points to linux-pf (the following example is from one of the maintainer's boxes):
 
{{bc|<nowiki>
 
title  Linux-pf 3.2
 
root  (hd0,4)
 
kernel (hd0,0)/vmlinuz-linux-pf root=/dev/disk/by-label/ROOT ro vga=0x318 lapic resume=/dev/disk/by-label/SWAP video=vesafb:ywrap,mtrr:3 fastboot quiet
 
initrd (hd0,0)/initramfs-linux-pf.img
 
</nowiki>}}
 
 
 
If you intend to use TuxOnIce for hibernation, make sure you have added the necessary modules to the MODULES array of {{ic|/etc/mkinitcpio.conf}} and at least the ''resume'' hook to the HOOKS array:
 
{{bc|<nowiki>
 
MODULES="... lzo tuxonice_compress tuxonice_swap tuxonice_userui ..."
 
HOOKS="... sata userui resume filesystems ..."
 
</nowiki>}}
 
In the example above, TuxOnIce is setup to use a swap partition as the suspended image allocator. The ''resume'' hook must be placed before ''filesystems''. Also, a progress indicator is requested with ''userui''. Please read the [[TuxOnIce]] wiki page for more detailed information.
 
 
 
Last, you must choose whether you want to suspend using [[pm-utils]] or the [[Suspending_to_Disk_with_hibernate-script#Tuxonice_method|hibernate-script]]. Please, refer to the respective wiki pages for more details. [[TuxOnIce]] offers the option for a text mode or an even nicer [[fbsplash|framebuffer splash]] progress indicator.
 
 
 
== Tweaks / Tips ==
 
* If you notice disk-related performance problems or occational hickups, it might be an I/O scheduler issue. Try a different one than the linux-pf default (BFQ) by echoing to {{ic|/sys/block/sda/queue/scheduler}} ''cfq'', ''noop'' or ''deadline'': '''''echo noop >| /sys/block/sda/queue/scheduler'''''. Note, the aforementioned command only sets the I/O scheduler for the 1st hard drive and additional ''echos'' will be needed if you have more. If the situation improves, then append "''elevator''='''''cfq'''''" (or '''''noop''''' or '''''deadline''''') to the linux-pf command line in {{ic|/boot/grub/menu.lst}}, to make the change permanent.
 
* For people who build their own tailored kernels and compilation aborts with with an error about "missing include/config/dvb/*.h files", setting <M> at ''DVB for Linux'' at ''Device Drivers/Multimedia support'' and leaving everything else out, creates just the necessary dvb.h, which allows the compilation to continue.
 
 
 
== Forum thread for linux-pf ==
 
There's a [https://bbs.archlinux.org/viewtopic.php?id=103462 discussion thread] at the BBS for reporting errors, impressions, ideas and requests.
 

Latest revision as of 12:31, 22 October 2017

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