Re: max_loop limit

Bill Davidsen
2007-03-29T14:19:47Z

roland wrote:
> partitions on loop or device-mapper devices ?
>
> you can use kpartx tool for this.
>
> bryn m. reeves told me, that it's probably poissible to create udev
> rules that will automatically create partition maps when a new loop
> device is setup, which is better than adding partitioning logig into
> dm-loop for example.

It is certainly possible to create a partitionable RAID device from a
loop device. Should be possible to use nbd as well, but I can't seem to
get nbd to work on 2.6.21-rc (my working system runs 2.6.17).
>
> example:
>> kpartx -a /dev/mapper/loop0
>>
>> # ls /dev/mapper/loop0*
>> /dev/mapper/loop0 /dev/mapper/loop0p1 /dev/mapper/loop0p2
>> /dev/mapper/loop0p3
>
> i have seen a patch for loop.c doing this, though. search the archives
> for this
>
> regards
> roland
>
>
>
>
>
> On Thu, Mar 22, 2007 at 02:33:14PM +0000, Al Viro wrote:
>> Correction: current ABI is crap. To set the thing up you need to open
>> it and issue an ioctl. Which is a bloody bad idea, for obvious
>> reasons...
>
> Agreed. What would be a right way? Global device ala ptmx/tun/tap?
> New syscall? Something else?
>
> OG.
> -
> ]

--
Bill Davidsen <davidsen@tmr.com>
"We have more to fear from the bungling of the incompetent than from
the machinations of the wicked." - from Slashdot