[linux-lvm] [Patch] Latest device-mapper snapshot
Greg Freemyer
freemyer at NorcrossGroup.com
Wed Oct 23 11:55:02 UTC 2002
Joe,
I haven't kept up.
What is LVM's status relative to the 2.5 feature freeze that is coming up?
TIA
Greg Freemyer
=====
>> New patchballs are available here:
>> http://people.sistina.com/~thornber/patches/2.5-stable/
>> Including a diff against 2.5.44-ac1. There are a lot of changes in
>> here compared to the last release, however most of these are due to
>> code refactoring rather than bug fixes. Highlights include:
>> o) Make the changes recommended by Christoph Hellwig and others:
>> http://marc.theaimsgroup.com/?l=linux-kernel&m=103462345119681&w=2
>> o) Add reference count to struct mapped_device, and struct dm_table.
>> o) Hide the above two structs in their respective .c file
>> o) Move all locking of struct mapped_device into dm.c (we can do this now
>> because
>> of the reference counting).
>> o) Remove the name and uuid field from struct mapped device, these are
>> really
>> only used by the interface as a way of refering to devices.
>> o) Nobody needs to lookup from kdev_t -> struct mapped_device, so remove
>> that hash table (thanks to Al Viros recent bdev->bd_disk stuff).
>> o) dm.c has no need of the dm-hash.c file any more, so merge dm-hash.c
>> into
>> dm-ioctl.c (the fs interface uses the dcache for lookups).
>> There are still open issues that prevent things working perfectly:
>> o) The gendisk hash table is getting confused when removing a device. eg,
>> if
>> I create 3 devices with minors (1, 2, 3). Then remove minor 2,
>> get_gendisk
>> will remove minor == 3. (Or I've done something really stupid).
>> o) Splitting pages still doesn't work, this is a generic block layer
>> thing rather than dm. In practise I can only trigger this with
>> striped targets. So stick to linear targets for now.
>> Filesystem interface to follow before the end of the week.
>> - Joe
>> _______________________________________________
>> linux-lvm mailing list
>> linux-lvm at sistina.com
>> http://lists.sistina.com/mailman/listinfo/linux-lvm
>> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
Greg Freemyer
Internet Engineer
Deployment and Integration Specialist
Compaq ASE - Tru64 v4, v5
Compaq Master ASE - SAN Architect
The Norcross Group
www.NorcrossGroup.com
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