ext4 devel interlock meeting minutes (Sept. 20, 2006)

Ext4 Developer Interlock Call: 9/20/06 Minutes

Attendees: Shaggy (Dave Kleikamp), Jean-Pierre Dion, Alexandre Ratchov, Valérie Clément, Eric Sandeen, Avantika Mathur

- Shaggy has ported the patch set to 2.6.18-rc7-mm1, and will post the patches today. Some of the patches are redundant and should be merged together, Shaggy and Alexandre will be working on this. These patches have only been compile tested, and need more thorough testing. Alexandre has been running ext4 on a 20 TB sparse disk for a month and has not encountered any problems.

- Shaggy and Alexandre will also look back at all of the comments on the original post, to verify they have been addressed in the updated series.

- Now that 2.6.18 is up, We assume Andrew Morton will be pushing current ext3 patches in the -mm tree to 2.6.19-rc1. At that point we will try to merge ext4 patches.

- Alexandre is waiting for feedback from Ted on e2fsprogs patches. Plan to discuss and review through the mailing list.

- A bug in the JBD patches was found last week; JBD and JBD2 use the same slab. The kernel crashes if ext3 and ext4 are both loaded. This problem is probably still present in current set. Easily reproduced by loading ext3 and ext4 modules, the second one will crash because of duplicate slab name.

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My posting from earlier this week was a result of reviewing the clusterfs patches, althoguh perhaps I should have been more explicit about my complaints:

*) In appropriate namespace leakage (all new functions that are visible should have the ext2fs_ prefix)

*) Interfaces that expose the on-disk extent format, and will therefore require changing (and thus breaking) the API and ABI when we add support for 48-bit or 64-bit extent patches.

I was trying to be a bit more constructive, though, and have been in the midst of reimplementing a better interface. Although if Alexandre has time in the next week or two, things might go faster if I can just explain what I want the new interface to look like and he can implement it. :-)

- Ted