Dne 10.4.2018 v 16:49 Richard W.M. Jones napsal(a):
On Tue, Apr 10, 2018 at 04:43:12PM +0200, Zdenek Kabelac wrote:
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:


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

Same thing with 4.16.0-300.fc28.x86_64:

<rescue> cat /sys/block/sda/queue/minimum_io_size

Forget to mention in my previous post - you should be able to override these
bad values reported from kernel with command line 'man pvcreate' options:
--dataalignment & --dataalignmentoffset



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