Linked by Thom Holwerda on Tue 31st Mar 2009 15:47 UTC, submitted by Rahul
Fedora Core The Fedora team has announced the Fedora 11 beta release. It comes packed with new features, such as Ext4 as the default filesystem, Nouveau driver by default, kernel mode setting on Intel, ATI and Nvidia drivers, many virtualization improvements, IBus input method, GCC 4.4, and much more.
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RE[2]: Ext4 as default
by broch on Tue 31st Mar 2009 18:55 UTC in reply to "RE: Ext4 as default"
broch
Member since:
2006-05-04

1) no "we" don't have solid testing because all this happened
2)2.6.30 is planned for summer (?) so it is not here yet
3) no it is not the same with backporting (there are some problems)
4) read Linus comment about ext4 about at lkml after 2.6.29 release.

Reply Parent Score: 0

RE[3]: Ext4 as default
by Rahul on Tue 31st Mar 2009 19:04 in reply to "RE[2]: Ext4 as default"
Rahul Member since:
2005-07-06

I will trust the Ext4 developers assertions better than a random poster. If you have actual descriptions of problems, let me know. Rawhide kernel has all the patches that is going into 2.6.30. Linus has commented on Ext3 as well. No big deal. Again, if you don't have specific bug reports on actual issues, there is nothing much to do. Ext3 continues to remain as a option if you want to pick a conservative choice.

Edited 2009-03-31 19:08 UTC

Reply Parent Score: 3

RE[3]: Ext4 as default
by sbergman27 on Tue 31st Mar 2009 19:09 in reply to "RE[2]: Ext4 as default"
sbergman27 Member since:
2005-07-24

read Linus comment about ext4 about at lkml after 2.6.29 release.

I've been waiting for that. Could you post a link. I'll be googling for it. But in the twisty, tangly web of lkml posts, one never knows if he's seen all the relevant ones.

Reply Parent Score: 2

RE[4]: Ext4 as default
by Rahul on Tue 31st Mar 2009 19:17 in reply to "RE[3]: Ext4 as default"
Rahul Member since:
2005-07-06

Try the thread on

http://thread.gmane.org/gmane.linux.kernel/811167/focus=811431

There are multiple sub-threads on that topic so you will have to go back and forth a bit.

Reply Parent Score: 1

RE[4]: Ext4 as default
by broch on Tue 31st Mar 2009 19:26 in reply to "RE[3]: Ext4 as default"
broch Member since:
2006-05-04

no problem:
http://lkml.org/lkml/2009/3/24/460
http://lkml.org/lkml/2009/3/24/415

of course I would suggest to read all because there are different arguments and points of view.
However, one cannot call something "thoroughly tested" if patch was introduced recently.
That is a whole point.

Moreover this (data loss) was a problem with xfs, which was fixed two years ago (patched in 2007). So with all due respect for ext4 developers (including the one who came from xfs), it seems that they may somehow skip other obvious (and well described) reasons for fs malfunctioning.

I have no doubts that eventually all problems will be ironed out, but I don't think that this is it now.

From what I understood Linus was mostly complaining about the default settings for ext4 which could cause dataloss. However, you only need to specify one single option when mounting ext4 and the problem goes away.

that is not what this bug was/is about. The problem is with the order data are written.
If you apply this "single option" you can as well go back to ext3 which is better tested.

Edited 2009-03-31 19:32 UTC

Reply Parent Score: 1

RE[3]: Ext4 as default
by aaronb on Tue 31st Mar 2009 19:10 in reply to "RE[2]: Ext4 as default"
aaronb Member since:
2005-07-06

Yes a few distributions will include the set of patches even if they are shipping 2.6.28 or 2.6.29.

There is quite a lot info on ext 4 at:
http://thunk.org/tytso/blog/

And a FOSDEM2009 video at:
http://fosdem.unixheads.org/2009/maintracks/

Edited 2009-03-31 19:23 UTC

Reply Parent Score: 2

RE[3]: Ext4 as default
by WereCatf on Tue 31st Mar 2009 19:18 in reply to "RE[2]: Ext4 as default"
WereCatf Member since:
2006-02-15

2)2.6.30 is planned for summer (?) so it is not here yet
3) no it is not the same with backporting (there are some problems)


No, 2.6.30 is not released yet so that's why the fixes were backported. And what is the problem with backporting a patch to an earlier kernel? I'd love to hear your explanation. The patch is essentially exactly the same, the difference is just that the backport patch compiles fine against an older kernel.

4) read Linus comment about ext4 about at lkml after 2.6.29 release.

From what I understood Linus was mostly complaining about the default settings for ext4 which could cause dataloss. However, you only need to specify one single option when mounting ext4 and the problem goes away.

Reply Parent Score: 2

RE[4]: Ext4 as default
by sbergman27 on Tue 31st Mar 2009 19:28 in reply to "RE[3]: Ext4 as default"
sbergman27 Member since:
2005-07-24

However, you only need to specify one single option when mounting ext4 and the problem goes away.

But which Ted claims destroys most of ext4's performance benefits.

Reply Parent Score: 3