Re: [Qemu-devel] Geometry and blocksize support for backing devices

2014-11-07 Thread Markus Armbruster
Christian Borntraeger writes: > Am 07.11.2014 10:17, schrieb Markus Armbruster: >> Christian Borntraeger writes: [...] >>> Now here comes my proposal: >>> Markus statement brought up an idea of special casing DASDs support. We can >>> call an ioctl BIODASDINFO on the block device that will only

Re: [Qemu-devel] Geometry and blocksize support for backing devices

2014-11-07 Thread Ekaterina Tumanova
On 11/07/2014 12:17 PM, Markus Armbruster wrote: Christian Borntraeger writes: Markus, Kevin, Stefan, here is a (somewhat late) followup of some KVM forum discussions regarding block size and geometry of pass-through block devices. Let's just do a quick wrap-up (as of my understanding) and a

Re: [Qemu-devel] Geometry and blocksize support for backing devices

2014-11-07 Thread Christian Borntraeger
Am 07.11.2014 10:17, schrieb Markus Armbruster: > Christian Borntraeger writes: > >> Markus, Kevin, Stefan, >> >> here is a (somewhat late) followup of some KVM forum discussions regarding >> block size and geometry of pass-through block devices. Let's just do a quick >> wrap-up (as of my underst

Re: [Qemu-devel] Geometry and blocksize support for backing devices

2014-11-07 Thread Markus Armbruster
Christian Borntraeger writes: > Markus, Kevin, Stefan, > > here is a (somewhat late) followup of some KVM forum discussions regarding > block size and geometry of pass-through block devices. Let's just do a quick > wrap-up (as of my understanding) and a proposal at the end of the mail > > > > > >

Re: [Qemu-devel] Geometry and blocksize support for backing devices

2014-11-06 Thread Christian Borntraeger
Am 06.11.2014 18:24, schrieb Paolo Bonzini: > > On 06/11/2014 16:58, Christian Borntraeger wrote: >> Now here comes my proposal: >> Markus statement brought up an idea of special casing DASDs support. We can >> call an ioctl BIODASDINFO on the block device that will only succeed if the >> host >>

Re: [Qemu-devel] Geometry and blocksize support for backing devices

2014-11-06 Thread Paolo Bonzini
On 06/11/2014 16:58, Christian Borntraeger wrote: > Now here comes my proposal: > Markus statement brought up an idea of special casing DASDs support. We can > call an ioctl BIODASDINFO on the block device that will only succeed if the > host > disk is really a dasd. We could enable the auto dete

[Qemu-devel] Geometry and blocksize support for backing devices

2014-11-06 Thread Christian Borntraeger
Markus, Kevin, Stefan, here is a (somewhat late) followup of some KVM forum discussions regarding block size and geometry of pass-through block devices. Let's just do a quick wrap-up (as of my understanding) and a proposal at the end of the mail - DASD/ECKD disk devices have several special p