On 19.08.2022 17:34, Drew Moseley wrote: > > **[Please note: This e-mail is from an EXTERNAL e-mail address] > > > On 8/19/22 8:50 AM, Dragos-Marian Panait wrote: >> >> Hi Claudius, >> >> On 19.08.2022 12:36, Claudius Heine wrote: >>> [Please note: This e-mail is from an EXTERNAL e-mail address] >>> >>> Hi Dew. >>> >>> On 2022-08-15 20:25, drew.moseley@gmail.com wrote: >>>> From: Drew Moseley >>>> >>>> The previous change to remove the dependency on systemd-udev-settle >>>> caused boot delays at least on qemu. It seems that change required >>>> a hwrng device but that's not necessarily available on all platforms. >>>> >>>> This changes the "Requires" to a "WantedBy" as modeled after the >>>> version of this file on Ubuntu 20.04. >>>> >>>> Signed-off-by: Drew Moseley >>>> --- >>>> meta/recipes-support/rng-tools/rng-tools/rng-tools.service | 3 +-- >>>>   1 file changed, 1 insertion(+), 2 deletions(-) >>>> >>>> diff --git >>>> a/meta/recipes-support/rng-tools/rng-tools/rng-tools.service >>>> b/meta/recipes-support/rng-tools/rng-tools/rng-tools.service >>>> index 0f50890dcb..b013d95932 100644 >>>> --- a/meta/recipes-support/rng-tools/rng-tools/rng-tools.service >>>> +++ b/meta/recipes-support/rng-tools/rng-tools/rng-tools.service >>>> @@ -3,8 +3,6 @@ Description=Hardware RNG Entropy Gatherer Daemon >>>>   DefaultDependencies=no >>>>   After=systemd-udev-settle.service >>>>   Before=sysinit.target >>>> >>>> shutdown.target >>>> >>>> >>>> -Requires=dev-hwrng.device >>>> -After=dev-hwrng.device >>>>   Conflicts=shutdown.target >>>> >>>> >>>> >>>>   [Service] >>>> @@ -32,3 +30,4 @@ SystemCallFilter=@system-service >>>> >>>>   [Install] >>>>   WantedBy=sysinit.target >>>> >>>> >>>> +WantedBy=dev-hwrng.device >>> >>> This looses the order. Have you tried just replacing `Requires` with >>> `Wants`. So something like this: >>> >>> >>> ``` >>> >>> Before=sysinit.target >>> >>> shutdown.target >>> >>> >>> Wants=dev-hwrng.device >>> After=dev-hwrng.device >>> Conflicts=shutdown.target >>> >>> >>> >>> ``` >>> >>> If that still would cause the long waiting time on qemu? >>> >>> I haven't investigated the qemu issue, but maybe qemu just doesn't >>> provide a hardware random source? If it doesn't provide a hardware >>> random source, then installing rng-tools on there might also not >>> make sense. >>> Alternatively maybe just adding a start timeout might solve it? >>> regards, >>> Claudius >> >> >> I've tested the patch on a NUC7, results are the same as with qemu: >> - increased boot time >> - timeout for rng-tools.service >> [ TIME ] Timed out waiting for device /dev/hwrng. >> [DEPEND] Dependency failed for Hard…e RNG Entropy Gatherer Daemon. >> >> Regards, >> Dragos >> > > Interesting. I guess this patch should definitely be ignored and the > patch from Khem that removes both the dev-hwrng and > systemd-udev-settle depencies is the right approach. That means that > the original problem that adding systemd-udev-settle was meant to > solve, is no longer solved but it seems that the proposed solutions > here have adverse effects elsewhere. > > Simply removing the systemd-udev-settle dependency fixes the issue > that my customer has that caused me to start investigating here. > > Drew > > -- > mailto:drew@moseleynet.net Sorry for the confusion, I did not test any additional patches/changes that have been suggested in this email thread. My test was performed on current Yocto master sources. No additional patches. I just wanted to inform that the boot delay is also observed on real hw, not just qemu. Again, sorry for the confusion. Dragos