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kernelOfTruth
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PostPosted: Sun Aug 17, 2008 1:37 am    Post subject: Official thread: "zen-sources" - Part V Reply with quote

checking the sources out

First Time

1) for zen-sources
Code:
Code:
cd /usr/src
git clone git://zen-sources.org/zen/zen.git zen-sources
cd zen-sources
make menuconfig


2) for zenmm-sources
Code:
Code:
cd /usr/src
git clone git://zen-sources.org/zen/mmotm.git zenmm-sources
cd zenmm-sources
make menuconfig


3) for zenrt-sources (doesn't exist yet / anymore)
Code:
Code:
cd /usr/src
git clone git://zen-sources.org/zen/kernel/zenrt.git zen-sources
cd zen-sources
make menuconfig


creating a patch
example:
Code:

git diff v2.6.24 v2.6.24-zen1 > 2.6.24-zen1.patch


you can also do most of this stuff graphically (GUI !) with qgit:
Code:
emerge qgit

or
Code:
apt-cache search qgit

then
Code:
sudo apt-get install qgit
(if that's the exact package name on apt/deb-based systems)

update sources (inside the directory)
Code:
Update
Code:

cd /usr/src/zen-sources
git pull
(called "merging")

you are in the middle of a conflicted merge:
output could be:
Quote:
git pull
Auto-merged .gitignore
Auto-merged MAINTAINERS
Auto-merged Makefile
CONFLICT (content): Merge conflict in Makefile
Removed arch/mips/lasat/sysctl.h
Auto-merged drivers/ata/libata-scsi.c
Auto-merged drivers/char/Kconfig
Auto-merged drivers/char/drm/ati_pcigart.c
Auto-merged drivers/char/drm/drm.h
Auto-merged drivers/char/drm/drm_drv.c
CONFLICT (content): Merge conflict in drivers/char/drm/drm_drv.c
...
Automatic merge failed; fix conflicts and then commit the result.

rmh3093 wrote:
This usually happens when the branch you are trying to update has been rebased. The easiest way to get around this is to checkout a new copy of the branch. For example, if you are currently on the master branch you would do something like the following:


first try:
Code:
git checkout -f && git pull

if that doesn't help, then:

Code:
git reset --hard; git branch -M master master-old; git checkout -b master origin/master; git branch -D master-old; git checkout -f


you need to change to another branch ?
example:
Code:
# git checkout master-devel


if the branch doesn't exist in your directory (
Code:
git branch
)
e.g. master-light, then enter
Code:
git branch master-light origin/master-light && git checkout master-light


you want to check out a specific version?
Code:
git checkout v2.6.25-rc5-zen0



speeding up merge (download) of zen-sources (during first time)
1) checkout the linux-2.6 branch of linus (git.eu.kernel.org or git.kernel.org)

Code:
git clone git://git.eu.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git


or

Code:
git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git


2) then merge both (e.g. it's in /usr/src/sources/linux-2.6)
Code:
 git clone --reference /usr/src/sources/linux-2.6/ git://zen-sources.org/zen/zen.git


what branches are there?
currently (december 2008), there are 2 different patchsets and branches used in those are (see):

( heads (zen-sources) ):
( heads (zenmm-sources) ):
( heads (zenrt-sources) ): (not available right now)

- master (git checkout master) (e.g. v2.6.24-zen3)

sometime there's also master-new or similar for testing / rebasing purposes

the other "head"s are branches which are added to the main tree

the project's site can be reached over at:
www.zen-sources.org

the repo is reachable via:
http://git.zen-sources.org/?p=zen.git;a=summary (zen-sources)
and/or
http://git.zen-sources.org/?p=mmotm.git;a=summary (zenmm-sources)
and/or
http://zen-sources.org/cgi-bin/gitweb.cgi?p=kernel-rt.git;a=summary (zenrt-sources) (not available right now)

as of August 2008 there's a zenhardened-sources planned with no ETA known yet

update:
removed reiser4-repository links

update2:
added instruction on how to git-clone linus' repository and using that for reference to update to the zen-sources repo

update3:
updated adresses to the new overlay/servers

update4:
updated the git-addresses for zen-sources and mmotm (mm-sources) of the new zen-sources server
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Last edited by kernelOfTruth on Thu Dec 18, 2008 1:07 pm; edited 6 times in total
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PostPosted: Sun Aug 17, 2008 6:26 am    Post subject: Reply with quote

CC drivers/block/floppy.o
CC drivers/block/brd.o
CC drivers/block/compcache.o
drivers/block/compcache.c: In function ‘compcache_size_setup’:
drivers/block/compcache.c:465: error: implicit declaration of function ‘strtoul’
make[2]: *** [drivers/block/compcache.o] Error 1
make[1]: *** [drivers/block] Error 2
make: *** [drivers] Error 2


errors with latest git pull zen-sources.
the kernel only compiles if compcache is selected as a module.
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mieszkoslusarczyk
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PostPosted: Sun Aug 17, 2008 6:36 am    Post subject: Reply with quote

I want to unmerge squashfs from zen-sources. Can you tell me how do I create a patch to do it?
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PostPosted: Sun Aug 17, 2008 7:26 am    Post subject: Reply with quote

mieszkoslusarczyk wrote:
I want to unmerge squashfs from zen-sources. Can you tell me how do I create a patch to do it?


look on gitweb for the commit id for squashfs and then use 'git revert'
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PostPosted: Sun Aug 17, 2008 7:31 am    Post subject: Reply with quote

Which id is it?
Is it one of those?
Code:
commit   43b8bda46f64f1d2222ba9cb705cf6a92d9ed87d

tree   6176375e037b4d853460abc51cc56d89fffdb9d5

parent   dcef349bb45244bb9b9d50f14a9a148ed21bea84

What command should I issue to do that?
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PostPosted: Sun Aug 17, 2008 8:02 am    Post subject: Reply with quote

rmh or cheater: e2fsprogs/ss/com_err 1.41 is now in tree, and such it should be dropped from zen-overlay. :O

also, wtb [alsa-kernel.git in -zen?] pst
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kernelOfTruth
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PostPosted: Sun Aug 17, 2008 11:09 am    Post subject: Reply with quote

rmh3093 wrote:
mieszkoslusarczyk wrote:
I want to unmerge squashfs from zen-sources. Can you tell me how do I create a patch to do it?


look on gitweb for the commit id for squashfs and then use 'git revert'


you can also do it with qgit (see first post of this thread)

@rmh3093, cheater1034:

is it safe now to use compcache with zen-sources and/or reiser4 ?

thanks for bumping zen-sources :)
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PostPosted: Sun Aug 17, 2008 11:22 am    Post subject: Reply with quote

Hi guys, do you plan to support new eee901 in zen? this means ethernet atl1e, wifi rt2860. ?? If so I would make a zen package for ARCH linux and eee901. But it looks like there are only sources for building a modules for those hw, not a kernel patch.

And another question is, if there is 1G-lowmem patch in x86 branch of ZEN. Im serching for this patch to the 2.6.26 kernel we use in ARCH linux for eee901.
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PostPosted: Sun Aug 17, 2008 3:31 pm    Post subject: Reply with quote

kernelOfTruth wrote:
rmh3093 wrote:
mieszkoslusarczyk wrote:
I want to unmerge squashfs from zen-sources. Can you tell me how do I create a patch to do it?


look on gitweb for the commit id for squashfs and then use 'git revert'


you can also do it with qgit (see first post of this thread)

@rmh3093, cheater1034:

is it safe now to use compcache with zen-sources and/or reiser4 ?

safe probably, does it work properly... probably not

thanks for bumping zen-sources :)

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PostPosted: Sun Aug 17, 2008 3:33 pm    Post subject: Reply with quote

RobertDavid wrote:
Hi guys, do you plan to support new eee901 in zen? this means ethernet atl1e, wifi rt2860. ?? If so I would make a zen package for ARCH linux and eee901. But it looks like there are only sources for building a modules for those hw, not a kernel patch.

And another question is, if there is 1G-lowmem patch in x86 branch of ZEN. Im serching for this patch to the 2.6.26 kernel we use in ARCH linux for eee901.


never heard of eee901 till now, i will look into it, its ok if it does apply as a patch, I Know how to make kbuild/makefile's

1G-lowmem is in there.... should be at least
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PostPosted: Sun Aug 17, 2008 5:33 pm    Post subject: Reply with quote

Is there a unionfs patch, that applies to latest zen-sources?
If not, could you make one, orinclude it in the tree?

#####EDIT
Sorry it doesn't apply to the 2.6.26 series of zen-sources, it DOES apply to the latest.
Btw.: Could you include unionfs in zen-sources?
Can anyone make a patch for 2.6.26-zen2?
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PostPosted: Mon Aug 18, 2008 2:43 am    Post subject: Reply with quote

http://download.filesystems.org/unionfs/unionfs-2.x/unionfs-2.4_for_2.6.26.diff.gz

Should work for unionfs on 2.6.26-zen2*, i'll add it to the latest git zen-sources as well.

If compcache doesn't work don't use it.
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PostPosted: Mon Aug 18, 2008 3:36 am    Post subject: Reply with quote

Git updates:
- Add unionfs 2.4
- Fix a build on allyesconfig
- Add alsa/git, 1.0.18-rc1
- Revert comp cache
- Reiser4 code cleanups (~17,000 line patch :-p)

*edit*
Also added ext4 stuff, like online defrag v9 + more:

Code:
ext4_journal_credits_fix_for_writepages.patch
ext4-online-defrag-ext4-defrag.patch
ext4-online-defrag-alloc-contiguous-blks.patch
defrag-alloc-contiugous-blks-credit
ext4-online-defrag-relocate-file-data.patch
defrag-relocate-file-data-credits
ext4-online-defrag-exchange-blocks-between-two-inodes.patch
ext4-online-defrag-for-relevant-files.patch
ext4-online-defrag-check-for-freespace-fragmentation.patch
ext4-online-defrag-move-victim-files.patch
vfs-fiemap.patch
ocfs2-fiemap.patch
generic-fiemap.patch
ext4-fiemap.patch
ext4_fix_printk_checkpatch_issues


*edit*
Quote:
for our reiser4-users/fans there's also vanilla+reiser4 only patchset and/or a reiser4-progs repository:

I'm quite sure we do not want to use these, don't lead users to this git repo ;)

*edit*
2.6.27-rc3-zen is about completed in git, and stabilized except for a minor zen-tune issue, it has btrfs v16 now and the latest mercurial~
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PostPosted: Mon Aug 18, 2008 7:48 am    Post subject: Reply with quote

compcache excluded in 2.6.27-rc3? wasnt able to find it... should be /drivers/block-devices, shouldn't it?
and what is zen-tunable sysfs? wasn able to find anything on the net...

thx, mantoo
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PostPosted: Mon Aug 18, 2008 3:56 pm    Post subject: Reply with quote

pulled this am and got this when trying to compile:
Code:

...
 CC      block/genhd.o
  CC      block/scsi_ioctl.o
  CC      block/cmd-filter.o
  CC      block/noop-iosched.o
  CC      block/deadline-iosched.o
  CC      block/cfq-iosched.o
  CC      block/compat_ioctl.o
  LD      block/built-in.o
  CC      zen/zen-system-layout-main.o
zen/zen-system-layout-main.c: In function 'zen_system_layout_init':
zen/zen-system-layout-main.c:75: warning: ISO C90 forbids mixed declarations and code
  CC      zen/sysfs.o
  CC      zen/zen-tune-main.o
  LD      zen/zen-tune.o
  LD      zen/zen-system-layout.o
  LD      zen/built-in.o
zen/zen-system-layout.o:(.data+0x0): multiple definition of `available_layouts'
zen/zen-tune.o:(.data+0x0): first defined here
make[1]: *** [zen/built-in.o] Error 1
make: *** [zen] Error 2


Any ideas? Or is it user error? Thanks.
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PostPosted: Mon Aug 18, 2008 7:37 pm    Post subject: Reply with quote

mantoo wrote:
compcache excluded in 2.6.27-rc3? wasnt able to find it... should be /drivers/block-devices, shouldn't it?

It has been reverted in zen, it's broken, it was never in main line kernel if that's what you mean.

Quote:
and what is zen-tunable sysfs? wasn able to find anything on the net...

thx, mantoo


zen-tune is only in zen, started as a basic way to set different settings (ie scheduler niceness, swappiness, etc) throughout the kernel's kconfig, rather than editing the files manually.

zen-sysfs, zen system layout is all written by rmh, using kernel kobjects/sysfs interface, it allows the options/tunables set to be read in files in /sys/kernel/zen. Some of them being writable meaning you can change the setting during runtime, without recompiling the kernel ;)
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PostPosted: Mon Aug 18, 2008 8:04 pm    Post subject: Reply with quote

cheater1034 wrote:
mantoo wrote:
compcache excluded in 2.6.27-rc3? wasnt able to find it... should be /drivers/block-devices, shouldn't it?

It has been reverted in zen, it's broken, it was never in main line kernel if that's what you mean.

Quote:
and what is zen-tunable sysfs? wasn able to find anything on the net...

thx, mantoo


zen-tune is only in zen, started as a basic way to set different settings (ie scheduler niceness, swappiness, etc) throughout the kernel's kconfig, rather than editing the files manually.

zen-sysfs, zen system layout is all written by rmh, using kernel kobjects/sysfs interface, it allows the options/tunables set to be read in files in /sys/kernel/zen. Some of them being writable meaning you can change the setting during runtime, without recompiling the kernel ;)


currently im using 2.6.27-rc3-zen1 kernel, running dtable for me. just wondered about compcache being mentioned some posts above but not finding anything related in my kernelconfig.

is it advantageous to load the module w/o planning to set those values manually. what i mean is this module used by the kernel itself?

thx
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PostPosted: Mon Aug 18, 2008 10:35 pm    Post subject: Reply with quote

mantoo wrote:
cheater1034 wrote:
mantoo wrote:
compcache excluded in 2.6.27-rc3? wasnt able to find it... should be /drivers/block-devices, shouldn't it?

It has been reverted in zen, it's broken, it was never in main line kernel if that's what you mean.

Quote:
and what is zen-tunable sysfs? wasn able to find anything on the net...

thx, mantoo


zen-tune is only in zen, started as a basic way to set different settings (ie scheduler niceness, swappiness, etc) throughout the kernel's kconfig, rather than editing the files manually.

zen-sysfs, zen system layout is all written by rmh, using kernel kobjects/sysfs interface, it allows the options/tunables set to be read in files in /sys/kernel/zen. Some of them being writable meaning you can change the setting during runtime, without recompiling the kernel ;)


currently im using 2.6.27-rc3-zen1 kernel, running dtable for me. just wondered about compcache being mentioned some posts above but not finding anything related in my kernelconfig.

is it advantageous to load the module w/o planning to set those values manually. what i mean is this module used by the kernel itself?

thx


In the latest git pull you will find it, i believe i have fixed it but it hasn't been tested yet.
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PostPosted: Tue Aug 19, 2008 8:37 am    Post subject: Reply with quote

cheater1034 wrote:
mantoo wrote:
cheater1034 wrote:
mantoo wrote:
compcache excluded in 2.6.27-rc3? wasnt able to find it... should be /drivers/block-devices, shouldn't it?

It has been reverted in zen, it's broken, it was never in main line kernel if that's what you mean.

Quote:
and what is zen-tunable sysfs? wasn able to find anything on the net...

thx, mantoo


zen-tune is only in zen, started as a basic way to set different settings (ie scheduler niceness, swappiness, etc) throughout the kernel's kconfig, rather than editing the files manually.

zen-sysfs, zen system layout is all written by rmh, using kernel kobjects/sysfs interface, it allows the options/tunables set to be read in files in /sys/kernel/zen. Some of them being writable meaning you can change the setting during runtime, without recompiling the kernel ;)


currently im using 2.6.27-rc3-zen1 kernel, running dtable for me. just wondered about compcache being mentioned some posts above but not finding anything related in my kernelconfig.

is it advantageous to load the module w/o planning to set those values manually. what i mean is this module used by the kernel itself?

thx


In the latest git pull you will find it, i believe i have fixed it but it hasn't been tested yet.


ok, thx, found it and im using it since about 3 hrs without noticing any probs... after the latest emerges im currently running im gonna try to test some memory-intensive progs to force using of swap while recompiling some stuff... what i noticed in dmesg:
Quote:
compcache: compcache size not provided. Using default: (25% of Total RAM).
Use compcache_size_kbytes module param to specify custom size
compcache: Compressed swap size set to: 518860 KB
TLSF: pool: f8dbc000, init_size=16384, max_size=0, grow_size=16384


but top still giving that info:
Quote:
Mem: 2075440k total, 966048k used, 1109392k free, 52740k buffers
Swap: 1004052k total, 0k used, 1004052k free, 418040k cached


so although compcache set my swap to 512 mb top still says there's 1 gig of swap. doesn't top yet "see" compcache? as far as i understood compcache is replacing the physical swap and putting it to ram compressed. but by replacing the "swap" the swapsize should be reduced by the half.... ?!?
another thing i noticed through conky always running is that every time i started up my box there was a usage of about 600 - 700 kb of my swap by default... since compcache conky saying 0 kb...is it due to conky not being able to read the size of swap in compressed state used out of the ram or am i mixing up 2 completely different things?
did i maybe miss to disable my physical swap(partition)?

EDIT:
i pumped up the usage of my mem by running nearly every single program with gui i found on my system with at the end opening up some images im gimp and upscaling to 1000%; that way i foced a usage of
Quote:
Mem: 2075440k total, 2019940k used, 55500k free,
Swap: 1004052k total, 27388k used, 976664k free,

the system ran stable but im not able to tell anything about speed increases yes... further testing is waiting... :-)

so far, greetz,
mantoo


Last edited by mantoo on Tue Aug 19, 2008 10:23 am; edited 1 time in total
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PostPosted: Tue Aug 19, 2008 10:17 am    Post subject: Reply with quote

Thanks for your hard work. Your patchset is great. But I'm wonder, if this patch will be ever included? (support for cpufreqd to change cpu speed on Celeron M 5xx via p4-clockmod)
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PostPosted: Tue Aug 19, 2008 10:59 am    Post subject: Reply with quote

@mantoo:

have you meanwhile restarted your box several times and noticed any BUGs / locks during shutting down ?

if no are you using reiser4 (at all) ?

last time I used it there was some kind of triggered BUG / problem with compcache, pdflush, kswapd and reiser4 afaik (on .26-zen*)

thanks
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PostPosted: Tue Aug 19, 2008 2:02 pm    Post subject: Reply with quote

currently I'm running all possible apps I can think of and it's only using 300 MB of swap - great ! :D (and it's rockstable)

Quote:
free -m
total used free shared buffers cached
Mem: 3950 3929 20 0 12 1003
-/+ buffers/cache: 2913 1037
Swap: 3489 314 3174


Quote:
cat /proc/sys/vm/swappiness
99


Quote:
cat /proc/swaps
Filename Type Size Used Priority
/dev/mapper/system-swap partition 2562328 0 -1
/dev/ramzswap0 partition 1011304 330160 1

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PostPosted: Tue Aug 19, 2008 2:12 pm    Post subject: Reply with quote

kernelOfTruth wrote:
@mantoo:

have you meanwhile restarted your box several times and noticed any BUGs / locks during shutting down ?

if no are you using reiser4 (at all) ?

last time I used it there was some kind of triggered BUG / problem with compcache, pdflush, kswapd and reiser4 afaik (on .26-zen*)

thanks


didnt notice any locks or even probs... rockstable as mentioned in your next post :-)

still im not using reiserfs4, because im still a bit afraid of it.... first i have to get a bit time at weekend and backup all my stuff, then maybe im gonna give it a try as its now known as more performant than most other fs's..

greez, mantoo
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kernelOfTruth
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Joined: 20 Dec 2005
Posts: 6108
Location: Vienna, Austria; Germany; hello world :)

PostPosted: Tue Aug 19, 2008 2:22 pm    Post subject: Reply with quote

well - after the compress swap has filled it's crawling now :lol:

Quote:
free -m
total used free shared buffers cached
Mem: 3950 3915 35 0 9 510
-/+ buffers/cache: 3394 555
Swap: 3489 1088 2401


Quote:
cat /proc/swaps
Filename Type Size Used Priority
/dev/mapper/system-swap partition 2562328 103080 -1
/dev/ramzswap0 partition 1011304 1011304 1


didn't know that googleearth eats THAT much ram :wink:

after closing most of the apps: (sorry didn't think of looking at it during peak load)

Quote:
cat /proc/compcache
DiskSize: 1011308 kB
NumReads: 244632
NumWrites: 249109
FailedReads: 0
FailedWrites: 0
InvalidIO: 0
GoodCompress: 93 %
NoCompress: 0 %
CurrentPages: 246354
CurrentMem: 255056 kB
PeakMem: 255056 kB


conclusion:

if you're having much of ram & critical work loads, ensure that the compressed swap in ram isn't too small & you'll never have to run swap on harddisks in case you're running lots of apps / apps that need much ram -> that way you'll get pretty nice performance :)
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Hardcore Gentoo Linux user since 2004 :D


Last edited by kernelOfTruth on Tue Aug 19, 2008 2:45 pm; edited 2 times in total
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cheater1034
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Joined: 09 Sep 2004
Posts: 1558

PostPosted: Tue Aug 19, 2008 2:23 pm    Post subject: Reply with quote

Civil wrote:
Thanks for your hard work. Your patchset is great. But I'm wonder, if this patch will be ever included? (support for cpufreqd to change cpu speed on Celeron M 5xx via p4-clockmod)


Patch is in latest pull.
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