HOWTO: Reiser4 for gentoo-sources

creidiki · Posted: Thu Feb 07, 2008 8:00 pm Post subject:

i think reg40 does compression now, and ccreg40 is deprecated.

as in, lzo1 compression is on by default. last i heard, to disable compression you had to use compressMode=none.
_________________
'((eINIT) (soor overlay))

zxy · Posted: Thu Feb 07, 2008 8:02 pm Post subject:

creidiki · Posted: Thu Feb 07, 2008 8:04 pm Post subject:

I can't remember.. I don't have my links with me, and most of the sites hosting what little hard info there was on reiser4 have died.

That's my biggest beef with it really, it pretty much lacks any documentation /whatsoever/.

When I tested it myself though, partitions made with ccreg40 had bigger files than reg40 partitions - everything else default, so it might be even true.

With R4, you never know
_________________
'((eINIT) (soor overlay))

Simba7 · Posted: Thu Feb 07, 2008 8:10 pm Post subject:

zxy · Posted: Thu Feb 07, 2008 8:11 pm Post subject:

@creidiki Testing with du produces wrong results. Afaik or as far as i tested, df works and du doesn't.

What did you use to test, if you remember?
_________________
Nature does not hurry, yet everything is accomplished.
Lao Tzu

creidiki · Posted: Thu Feb 07, 2008 8:58 pm Post subject:

df
_________________
'((eINIT) (soor overlay))

Simba7 · Posted: Fri Feb 08, 2008 2:53 am Post subject:

dusanc · Apprentice Joined: 19 Sep 2005 Posts: 248 Location: Serbia

By default it creates uncompressed partition.
With ccreg40 it creates compressed lzo1 partition.
Oh and can you please send your bug reports to the reiserfs-devel@vger.kernel.org because there is no report of such problem yet.
Kernel version, reiser4 patch used, setup details and detailed info to reproduce would be great.
TIA

Simba7 · Posted: Sat Feb 09, 2008 12:03 am Post subject:

Basically, I used the SystemRescueCD to do a Stage1 Gentoo install on my laptop.

I followed the instructions word for word, but I'll take a peek at my kernel.

My Partitions/FileSystems are:

/dev/sda1 - Windows XP Media Center Edition 2005 (NTFS) - 30GB
/dev/sda2 - /boot (ext2) - 16MB
/dev/sda3 - Swap (swap) - 512MB
/dev/sda4 - / (reiser4) - 6.7GB

..using GRUB.. I'm gonna try it on a straight Gentoo system and see if it works..

Simba7 · Posted: Sat Feb 09, 2008 3:37 am Post subject:

Yep.. Straight Gentoo system works perfectly.. Must be the way my partitions are layed out...

Maybe I should install Gentoo first, then Windows XP.

creidiki · Posted: Sat Feb 09, 2008 3:48 am Post subject:

Simba7 · Posted: Sat Feb 09, 2008 3:56 am Post subject:

..but would that prevent the kernel from being loaded completely?

The Kernel loads, but can't mount /dev/sda4. I'm going to wipe the system and throw XP on sda4 and see what happens.

I could always get /dev/sda1-4 partitioned, install Windows first (on sda4), then Gentoo on sda1-3.

EDIT: Yep.. My partitions were screwy..
After I B&N'd it, I partitioned it using SRCD (sda1=linux, sda2=linux swap, sda3=linux, sda4=ntfs), making the filesystems (sda1=ext2, sda3=reiser4), then rebooted and installed XP. After that was finished, I rebooted again and put my SRCD back into it and built Gentoo on Reiser4. Works Perfectly.

Simba7 · Posted: Mon Feb 11, 2008 7:36 am Post subject:

Oh ya.. One other question.. How to I prevent emerge --sync from trashing my reiser4-gentoo-sources?

ArneBab · Posted: Mon Feb 11, 2008 10:09 am Post subject:

Put them into /usr/local/portage (or on recent systems I think it's /usr/portage/local )

The variable where you find this is in /etc/make.conf: PORTDIR_OVERLAY
_________________
Being unpolitical means being political without realizing it. - Arne Babenhauserheide ( http://draketo.de )

pkgcore: So fast that it feels unreal - by doing only what is needed.

musv · Advocate Joined: 01 Dec 2002 Posts: 3337 Location: de

dusanc · Apprentice Joined: 19 Sep 2005 Posts: 248 Location: Serbia

musv: Reiser4 mailing list adress is reiserfs-devel@vger.kernel.org
You should post that bugreport there. Exact kernel which was used (vanilla, gentoo-sources...), reiser4 patch version, how is fs formated (default or cryptocompress), that oops and a way to reproduce it would be enough ( I read that here, but there are people who don't read gentoo forums, can you imagine?

).

Thanks in advance
dushan

Simba7 · Posted: Sun Feb 24, 2008 3:38 pm Post subject:

Huh.. Odd.. I don't get this error on squit (Dual PPro 200 w/1MB Cache).

..although I get something like this on scratchansniff (PII-450), but I'm suspecting it's madwifi-ng and not reiser4. It doesn't require a reboot or anything..

SlackwareInAZ · Tux's lil' helper Joined: 29 Aug 2005 Posts: 92

musv,

Your problem sounds like my "chrooting" problem. It seems that reiser4 does not like to be heavily accessed from another operating system.

I can get the segfaults whether I access a R4 32-bit Gentoo install from Slackware or vice versa, so it's not a Gentoo issue.

I get them when I access my Gentoo-amd64 (just converted to 64-bit last week) from Slamd64 and vice versa there too, so it's consist across architectures.

I wasn't able to get a serial console output or camera picture of the segfaults. They do not require a reboot in Slackware, but they do in Gentoo. I guess that's possibly due to different method of init scripts.

I would venture to say this problem is prevalent on ANY reiser4 system that is accessed from another linux os. It's amazing that it has not been fixed yet as it is alarmingly easy to reproduce.

Gary

kernelOfTruth · Posted: Tue Feb 26, 2008 7:12 pm Post subject:

Gary,

some ideas:

if you're not using baselayout-2, try it in combination with the reiser4progs patch I posted:
https://bugs.gentoo.org/show_bug.cgi?id=195988 (and see 1 or 2 pages earlier in this thread)

if you're using baselayout-2, try latest openrc snapshot (cvs, svn, I dunno, it wouldn't work for me a few weeks ago, but as posted in the bug-report should now do)

if you're using vanilla + reiser4, try zen-sources

...

Regards

kOT
_________________
https://github.com/kernelOfTruth/ZFS-for-SystemRescueCD/tree/ZFS-for-SysRescCD-4.9.0
https://github.com/kernelOfTruth/pulseaudio-equalizer-ladspa

Hardcore Gentoo Linux user since 2004

musv · Advocate Joined: 01 Dec 2002 Posts: 3337 Location: de

zxy · Posted: Sat Mar 01, 2008 10:22 am Post subject:

How to check the harddisk with reiser4 partitions for the badblocks? Is there anything special to know. I can't afford to wipe the partition by accident.
And I suspect that disk has (quite) some bad blocks.
Any experiences?
_________________
Nature does not hurry, yet everything is accomplished.
Lao Tzu

yngwin · Posted: Sat Mar 01, 2008 11:14 am Post subject:

For all you peeps there is now hitchhiker-sources in berkano overlay (available via layman). It is simply gentoo-sources with added reiser4 and udf-2.50 patches.
_________________
"Those who deny freedom to others deserve it not for themselves." - Abraham Lincoln
Free Culture | Defective by Design | EFF