Re: [dm-devel] Multipath Doc

[christophe varoqui <christophe varoqui free fr>]

Thanks for reading :)

Heinz Mauelshagen wrote:
> Christophe,
>
> the test io interval has been recently removed from dm in favour of
> user space path revalidation (of course that needs precautions, eg mlockall())
> in the application.
Thanks for noting. I will update the doc, but I need a bit more info :
Have you a prototype at hand ? Do you expect storage HW vendor will 
provide their own path revalidation primitives ? ... Have you message 
you want to pass to the HW vendors in this doc ?

> Are you aiming at replacing the partitioning code in Linux altogether by running
> kpartx in the early boot environment, setting up respective mapped devices ?
M Viro told me nearly 2 years back that it was doable but a little 
early. In the interim, the two partitioning scheme can co-exist : keep 
in-kernel partitions for legacy disks, but use DM/kpartx for any new 
type of disk that would otherwise require kernel code to handle parts : 
md, loop, ataraid, ...

regards,
cvaroqui