[ovirt-devel] [VDSM] All tests using directio fail on CI

[Nir Soffer]

On Wed, Sep 28, 2016 at 11:39 PM, Yaniv Kaul <ykaul at redhat.com> wrote:
> On Sep 28, 2016 11:37 PM, "Nir Soffer" <nsoffer at redhat.com> wrote:
>>
>> On Wed, Sep 28, 2016 at 11:20 PM, Nir Soffer <nsoffer at redhat.com> wrote:
>> > On Wed, Sep 28, 2016 at 10:31 PM, Barak Korren <bkorren at redhat.com>
>> > wrote:
>> >> The CI setup did not change recently.
>> >
>> > Great
>> >
>> >> All standard-CI jobs run inside mock (chroot) which is stored on top
>> >> of a regular FS, so they should not be affected by the slave OS at all
>> >> as far as FS settings go.
>> >>
>> >> But perhaps some slave-OS/mock-OS combination is acting strangely, so
>> >> could you be more specific and point to particular job runs that fail?
>> >
>> > This jobs failed, but it was deleted (I get 404 now):
>> > http://jenkins.ovirt.org/job/vdsm_master_check-patch-fc24-x86_64/2530/
>>
>> Oops, wrong build.
>>
>> This is the failing build:
>>
>>
>> http://jenkins.ovirt.org/job/vdsm_master_check-patch-el7-x86_64/1054/console
>>
>> And this is probably the reason - using a ram disk:
>>
>> 12:24:53 Building remotely on ovirt-srv08.phx.ovirt.org (phx physical
>> integ-tests ram_disk fc23) in workspace
>> /home/jenkins/workspace/vdsm_master_check-patch-el7-x86_64
>>
>> We cannot run the storage tests using a ramdisk. We are creating
>> (tiny) volumes and storage domains and doing copies, this code cannot
>> work with ramdisk.
>
> Will it work on zram?
> What if we configure ram based iSCSI targets?

I don't know, but it is easy to test - it this works the tests will work:

dd if=/dev/zero of=file bs=512 count=1 oflag=direct