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dR0PS
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PostPosted: Wed Feb 16, 2011 6:09 pm    Post subject: reiser4 mount time on >1TB partitions Reply with quote

Lately I've experienced with reiser4 on dmcrypt partitions >1TB

Mounting reiser4 on such a partiion took me about 1 Minute !
using reiser4 on Partitions <1TB seems to be less time consuming ~ 10 seconds

I didn't know why there was such a big difference on larger partitions
It seems to me that mounting time exponentially raises at above 1TB ?!

so I went to ext4 with dmcrypt, although I'm a reiser4 fan from the beginning...
mounting ext4 on dmcrypt is instantly

I still use reiser4 on /
but for my newly installed data partitions I was stuck on using ext4 :/
If anyone knows why big partitions are a problem for reiser4, please tell :)
There is no option on reiser4 for blocksizes >4096, so thats not an option

dR0PS
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PostPosted: Wed Feb 16, 2011 6:13 pm    Post subject: Re: reiser4 mount time on >1TB partitions Reply with quote

dR0PS wrote:
Lately I've experienced with reiser4 on dmcrypt partitions >1TB

Mounting reiser4 on such a partiion took me about 1 Minute !
using reiser4 on Partitions <1TB seems to be less time consuming ~ 10 seconds

I didn't know why there was such a big difference on larger partitions
It seems to me that mounting time exponentially raises at above 1TB ?!

so I went to ext4 with dmcrypt, although I'm a reiser4 fan from the beginning...
mounting ext4 on dmcrypt is instantly

I still use reiser4 on /
but for my newly installed data partitions I was stuck on using ext4 :/
If anyone knows why big partitions are a problem for reiser4, please tell :)
There is no option on reiser4 for blocksizes >4096, so thats not an option

dR0PS


I don't know if it's already included in the FAQ but:

Quote:
+dont_load_bitmap
+ Don't load all bitmap blocks at mount time, it is useful for
+ machines with tiny RAM and large disks.


so that mount-option might be helpful :)
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dR0PS
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PostPosted: Wed Feb 16, 2011 6:16 pm    Post subject: Reply with quote

wow, that was quick ...

I will try that, are there any disadvantages with that?
Code:
dont_load_bitmap

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PostPosted: Wed Feb 16, 2011 6:27 pm    Post subject: Reply with quote

Some people that had some problems had don't load bitmap enabled. Devs are currently looking if it's connected.
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PostPosted: Wed Feb 16, 2011 6:27 pm    Post subject: Reply with quote

@dusanc:

mid-air collision :P

dR0PS wrote:
wow, that was quick ...

I will try that, are there any disadvantages with that?

Code:
dont_load_bitmap


I just happened to read my mail notification at that time :P

Edward Shishkin wrote:
There were complaints that loading bitmaps "on-demand" causes
system lockups, I didn't have a chance to look at this yet. So
I wouldn't recommend to use this mount option for now.


this hasn't happened to me yet

@other Reiser4 users:

anyone ?
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PostPosted: Wed Feb 16, 2011 9:39 pm    Post subject: Reply with quote

kernelOfTruth wrote:
if you folks are having problems with fixing your filesystem

a (potential) fix has been posted for reiser4progs 1.0.7 :idea: :

http://marc.info/?l=reiserfs-devel&m=129703129519745&w=2


Maybe it's a lame question, but: how I may find out if this patch is included in the lastest sys-fs/reiser4progs from portage? It will be version bump (-r1)? Is there an easy way to include such a patch on my own? (better than moving package to local overlay, add patch to ./files directory and modify ebuild)
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PostPosted: Sun Mar 13, 2011 9:25 pm    Post subject: Reply with quote

Just want to throw in my experiences with R4, have been using it the past couple years but only just recently took it off all my boxes.

For me with the last couple kernels it's been buggy, buggy to the point where I have been waiting patiently, trying patches from the mailing list, mounting options, making a kernel with just R4 patches etc but it's just to loopy for me to bother anymore. If the uptime was over a day or two it would crash on shutdown (unmounting specifically). I use it on /tmp and almost like clockwork when compiling big packages with deep directories (gcc, chromium) it would leave an undeletable file in a deep folder that would need an fsck then remount to delete. For the most part the filesystem works as advertised, fast, responsive and never loses files. I always stayed with it as the r4 fsck worked very well.

I see that it is up for inclusion in the kernel in the near future. I may try it again after that but for now I rolled back to regular ReiserFS. Too bad really as linux filesystems are in a bit of a slump right now. ext4 with all its issues, btrfs with its issues, zfs being whatever, wait and see I guess.

I'm not looking for advice, I'm not going to try anything, I'm not posting to the reiserfs mailing list again, these are just my experiences. Take it on face value.
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PostPosted: Sun Mar 13, 2011 10:32 pm    Post subject: Reply with quote

Saundersx wrote:
Just want to throw in my experiences with R4, have been using it the past couple years but only just recently took it off all my boxes.

For me with the last couple kernels it's been buggy, buggy to the point where I have been waiting patiently, trying patches from the mailing list, mounting options, making a kernel with just R4 patches etc but it's just to loopy for me to bother anymore. If the uptime was over a day or two it would crash on shutdown (unmounting specifically). I use it on /tmp and almost like clockwork when compiling big packages with deep directories (gcc, chromium) it would leave an undeletable file in a deep folder that would need an fsck then remount to delete. For the most part the filesystem works as advertised, fast, responsive and never loses files. I always stayed with it as the r4 fsck worked very well.

I see that it is up for inclusion in the kernel in the near future. I may try it again after that but for now I rolled back to regular ReiserFS. Too bad really as linux filesystems are in a bit of a slump right now. ext4 with all its issues, btrfs with its issues, zfs being whatever, wait and see I guess.

I'm not looking for advice, I'm not going to try anything, I'm not posting to the reiserfs mailing list again, these are just my experiences. Take it on face value.


take a look on the reiserfs or linux kernel mailing list for recent reiserfs related issues

afaik there have been some (including data loss)

might be due to removal of BKL or other recent changes in the kernel

a heads up to make some backups on other filesystems - just in case
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PostPosted: Tue Mar 29, 2011 10:04 am    Post subject: Reply with quote

Is there any information from Edward, when there's a Patch for 2.6.38 available?
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PostPosted: Tue Mar 29, 2011 11:17 am    Post subject: Reply with quote

Nothing yet :D
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PostPosted: Mon Apr 04, 2011 9:55 am    Post subject: Reply with quote

It seems the patch is available since yesterday.
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PostPosted: Mon May 30, 2011 4:24 pm    Post subject: Re: Reiser4 Gentoo FAQ [04Apr2011] Reply with quote

Hello,

some comments from a fellow reiser4-user:

dusanc wrote:

Q10: I've formated my / with r4 and now can't boot. What should I do?

You'll have to use a separate /boot partition (50-100MB ext2).


Actually it is (or at least was) possible to patch grub in order to boot from a reiser4 partition. I did this on my old box, however refrained from it in order to keep track with the updates in portage.
More information can be found here: https://reiser4.wiki.kernel.org/index.php/Reiser4_Howto/GRUB


dusanc wrote:

Q14: Any bugs that I should know of?
Kernels <2.6.36 should have problems with glibc 2.24 when using splice etc. it can destroy names of your data or create zero length files.
Please use >2.6.36
Same problems reported by some users with 2.6.38+KDE


I think you mean glib, as glibc hasn't reached this version yet :-)
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PostPosted: Mon May 30, 2011 8:16 pm    Post subject: Re: Reiser4 Gentoo FAQ [04Apr2011] Reply with quote

bheinze wrote:
Hello,
some comments from a fellow reiser4-user:
dusanc wrote:

Q10: I've formated my / with r4 and now can't boot. What should I do?
You'll have to use a separate /boot partition (50-100MB ext2).

Actually it is (or at least was) possible to patch grub in order to boot from a reiser4 partition. I did this on my old box, however refrained from it in order to keep track with the updates in portage.
More information can be found here: https://reiser4.wiki.kernel.org/index.php/Reiser4_Howto/GRUB

AFAIK it doesn't work with R4+CC, but YMMV
bheinze wrote:

dusanc wrote:

Q14: Any bugs that I should know of?
Kernels <2.6.36 should have problems with glibc 2.24 when using splice etc. it can destroy names of your data or create zero length files.
Please use >2.6.36
Same problems reported by some users with 2.6.38+KDE


I think you mean glib, as glibc hasn't reached this version yet :-)

I know you're right :D
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PostPosted: Sat Jun 11, 2011 8:07 pm    Post subject: Reply with quote

Quote:
Q11: When will Reiser4 be included in mainline Linux kernel?
Ask $DEITY.
Quote:
I don't see any technical obstacles for Reiser4 inclusion. There are only organisation ones: I don't think it will be accepted without support from some vendor.
Thanks,
Edward.
http://www.phoronix.com/scan.php?page=news_item&px=OTA2Mw


We're coming to the chicken and egg problem again... :(

I'm starting to believe R4 will just fade away, maybe akpm could do something....
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PostPosted: Wed Jun 29, 2011 6:03 am    Post subject: Reply with quote

dusanc wrote:

We're coming to the chicken and egg problem again... :(

I'm starting to believe R4 will just fade away, maybe akpm could do something....


I figured once Edward was hired by Red Hat R4 getting into the kernel would never happen and so far that seems to be what's happening. He was reviewing btrfs for them last I read.

It's too bad the politics, egos and fear of negative associations were the things that stood in it's way.
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PostPosted: Tue Nov 15, 2011 6:09 am    Post subject: Reply with quote

2.6.39 is out and files are now on new location http://sourceforge.net/projects/reiser4/files/reiser4-for-linux-2.6/
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PostPosted: Wed Nov 16, 2011 1:20 am    Post subject: Reply with quote

dusanc wrote:
2.6.39 is out and files are now on new location http://sourceforge.net/projects/reiser4/files/reiser4-for-linux-2.6/


So nice to see R4 still alive. thanks you!

some extra info about Q13:

the last sysresccd that support R4 is v2.3.1

see http://www.sysresccd.org/Changes-x86

link http://sourceforge.net/projects/systemrescuecd/files/sysresccd-x86/2.3.1/


Last edited by netguy on Sat Nov 19, 2011 3:47 pm; edited 1 time in total
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PostPosted: Fri Nov 18, 2011 10:00 pm    Post subject: Reply with quote

2.6.39-1 patch is out, fixes a build breakage for i586
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PostPosted: Sun Nov 27, 2011 12:51 pm    Post subject: Reply with quote

Is there a reason why the Reiser4 patches aren't available on kernel.org anymore?
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PostPosted: Sun Nov 27, 2011 7:07 pm    Post subject: Reply with quote

It is almost certainly one of the repercussions of kernel.org being hacked last summer.

kernel.org has been significantly locked down. They are carefully examining every service/practice that kernel.org was providing. And in many cases, kernel.org is either substantially changing or no longer supporting previous practices.
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PostPosted: Mon Sep 10, 2012 8:54 pm    Post subject: Reply with quote

We have a new patch for linux kernel-3.5.3 at http://sourceforge.net/projects/reiser4/files/reiser4-for-linux-3.x/

There's some info on current bugs:
Edward wrote:
Current status


The bug in the balancing primitive INSERT_FLOW (which
led to inconsistent key ordering) is not yet fixed.
So the following features can lead to data corruption:

. tail packing in the default file plugin;
. transparent compression.

Fsck will fix everything, however, it can be rather
annoying to check production systems frequently..


I updated the FAQ
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PostPosted: Sun Oct 21, 2012 9:11 pm    Post subject: Reply with quote

Reiser4 for kernel 3.6.2 is out, you can grab it at the usual place: http://sourceforge.net/projects/reiser4/files/reiser4-for-linux-3.x/

Changelog:

Code:
Ivan Shapovalov

. i_dentry is now hlist;
. kill write_super of super_ops:
  upstream commit f0cd2dbb6cf387 "vfs: kill write_super and
  sync_supers". It kills ->write_super() along with its sole
  user, thread sync_supers. Removed from reiser4.
. kunmap_atomic became single:
  upstream commit 167885e593 "feature-removal-schedule.txt:
  remove kmap_atomic(page, km_type)". The second argument was
  actually unused long ago. Kill it.
. create and lookup do not take nameidata

Edward Shishkin

. fixups in cryptcompress plugin:
  Fix up the main search procedure of cryptcompress plugin:
  . make full-fledged tree traversal in the case when we
    encountered empty right neighbor;
  . unlock the left neighbor only in the case when we moved
    to right.
. lock the wb-list, when calling writeback_sb_inodes;
. Capture super block when syncing fs to synchronize the
  superblock with the other stuff. Make gcc happy.

Current status:
The bug which leads to key inconsistency is not yet fixed.
The update is that INSERT_FLOW carry primitive is NOT the culprit,
the problem seems to be in another place.

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PostPosted: Sun Oct 28, 2012 10:45 pm    Post subject: Reply with quote

seems like Edward finally got the key inconsistency issue tackled :D

Quote:
Hi all.
It seems I do have the long-awaited fix.

The symptoms of the problem: kernel starts to issue complaints
about key inconsistency with the suggestions to check the partition
with fsck. Fsck sometimes finds corruptions, but sometimes reports
that file system is consistent.

Please apply the attached patch to reiser4 stuff for 3.6.2, or
download reiser4-for-3.6.4 (which already contains this patch), and
let me know if the problem has not gone:
http://sourceforge.net/projects/reiser4/files/reiser4-for-linux-3.x/

Please, don't rush to deploy production systems on reiser4: it can
take up to 80 hours to reproduce the problem with high workload.

Thank you for your help.

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PostPosted: Thu Jan 17, 2013 10:31 pm    Post subject: Reply with quote

Key inconsistency is finally fixed, there were some problem withinteraction with R4 and kernel hugepage support (migration).

reiser4-for-3.7.1 is out with no open bug reports :D

http://sourceforge.net/projects/reiser4/files/reiser4-for-linux-3.x/

PS. Oh and there is a new dev working on R4, if you didn't notice from changelogs :D
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PostPosted: Sat Jan 26, 2013 11:13 pm    Post subject: sys-fs/reiser4progs-1.0.7 ‒ w/ patches Reply with quote

sys-fs/reiser4progs-1.0.7 ‒ w/ patches from reiserfs-devel mailing list
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