[linux-lvm] [Patch] Latest device-mapper snapshot
Heinz J . Mauelshagen
mauelshagen at sistina.com
Thu Oct 24 02:41:01 UTC 2002
On Wed, Oct 23, 2002 at 12:54:37PM -0400, Greg Freemyer wrote:
> Joe,
>
> I haven't kept up.
>
> What is LVM's status relative to the 2.5 feature freeze that is coming up?
Greg,
device-mapper is in the Alan Cox kernel since ~2 weeks.
We are addressing a couple of change requests (last update happened ysterday)
with the main one being the recommendation to submit a driverfs interface for
device-mapper rather than an ioctl one which we hope to release in a couple
of days.
We are positive to make it in :)
Regards,
Heinz -- The LVM Guy --
>
> 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
>
> _______________________________________________
> 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/
*** Software bugs are stupid.
Nevertheless it needs not so stupid people to solve them ***
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Heinz Mauelshagen Sistina Software Inc.
Senior Consultant/Developer Am Sonnenhang 11
56242 Marienrachdorf
Germany
Mauelshagen at Sistina.com +49 2626 141200
FAX 924446
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