Re: [linux-lvm] "Data alignment must not exceed device size."

[Zdenek Kabelac <zkabelac@redhat.com>]

Dne 10.4.2018 v 16:00 Richard W.M. Jones napsal(a):
> On Tue, Apr 10, 2018 at 09:47:30AM +0100, Richard W.M. Jones wrote:
>> Recently in Fedora something changed that stops us from creating small
>> LVs for testing.
>>
>> An example failure with a 64 MB partitioned disk:
>>
>> # parted -s -- /dev/sda mklabel msdos mkpart primary 128s -128s
>> Warning: The resulting partition is not properly aligned for best performance: 128s % 65535s != 0s
>> # lvm pvcreate --force /dev/sda1
>>    /dev/sda1: Data alignment must not exceed device size.
>>    Format-specific initialisation of physical volume /dev/sda1 failed.
>>    Failed to setup physical volume "/dev/sda1".
> 
> Interestingly the alignment properties of the virtio-scsi virtual disk
> has changed.  On the working system:
> 
> ==> /sys/block/sda/queue/minimum_io_size <==
> 512
> 
> ==> /sys/block/sda/queue/optimal_io_size <==
> 0
> 
> On the new / broken system:
> 
> ==> /sys/block/sda/queue/minimum_io_size <==
> 33553920
> 
> ==> /sys/block/sda/queue/optimal_io_size <==
> 0
> 
> (all other settings were the same).  I suppose this accounts for it,
> and it could therefore be a problem with qemu rather than LVM.
> 
> Working: qemu-2.11.0-4.fc28.x86_64
> Broken:  qemu-2.12.0-0.5.rc1.fc29.x86_64
> 
> Alasdair Kergon asked me to run the lvm command with -vvvv and I've
> attached those results.


Hi

Could you please retest first with official final release of 4.16 kernel.

There were some 'min()/max()' macro problems - maybe your rc4 build was affected.


Regards


Zdenek