ext4: system freeze

[Matthias-Christian Ott]

$ uname -a
Linux marix 2.6.28-11-generic #42-Ubuntu SMP Fri Apr 17 01:57:59 UTC 2009 i686 GNU/Linux
$ cvs -z3 -d <email address hidden> co -P src
[...]

I guess, ext4 freezed because too many (not synced) small files are created.

[Mantas Zimnickas (sirex)]

I'm using Ubuntu Jaunty. After installing it and using for one week, Ubuntu started to freeze just 10 minutes after boot. Then I found, that it's related with my PHP script, that creates 312 small files, with content similar to this:

-----8<-----
<?php // a:11:{s:3:"fid";s:4:"3495";s:10:"parent_fid";s:4:"3193";s:10:"linked_fid";s:1:"0";s:5:"title";s:14:"Kiti skelbimai";s:5:"image";s:1:"0";s:7:"imgname";N;s:7:"a_count";N;s:5:"order";s:1:"8";s:4:"type";s:5:"front";s:8:"front_id";s:4:"3495";s:9:"folder_id";s:1:"0";}
----->8-----

3 of 5 times, when I try to generate these small files, Ubuntu freezes.

 $ cat /etc/issue
Ubuntu 9.04 \n \l

 $ uname -a
Linux sirex-laptop 2.6.28-11-generic #42-Ubuntu SMP Fri Apr 17 01:57:59 UTC 2009 i686 GNU/Linux

 $ mount | grep ext4
/dev/sda1 on / type ext4 (rw,relatime,errors=remount-ro)
/dev/sda3 on /home type ext4 (rw,relatime)

[Andy Whitcroft (apw)]

This is not a bug in the linux-meta package, moving to the linux package.

[Leann Ogasawara (leannogasawara)]

Hi Mathias-Christian,

Are you still using an ext4 filesystem? If so, do you still see this issue with the latest 2.6.28-15.48 Jaunty kernel? If so, I've backported some additional ext4 related patches and put some test kernels at:

http://people.canonical.com/~ogasawara/ext4-jaunty/

There is currently an amd64 test kernel there but I'll be adding i386 once it finishes building. Please let us know your results if you are able to test. Thanks.

[Matthias-Christian Ott (matthias-christian)]

I'm using ext3 at the moment.

[Jeremy Foshee (jeremyfoshee)]

This bug report was marked as Incomplete and has not had any updated comments for quite some time. As a result this bug is being closed. Please reopen if this is still an issue in the current Ubuntu release http://www.ubuntu.com/getubuntu/download . Also, please be sure to provide any requested information that may have been missing. To reopen the bug, click on the current status under the Status column and change the status back to "New". Thanks.

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