[systemd-devel] dev-mmcblk0p2.device delay

[Mohamed Ali Fodha]

is it possible to remove/disable virtual unit (device units)?
I am able to reduce boot time by commenting rules in
60-persistent-storage.rules such as by-path, by-id,by-label, is this change
may have an impact?

Thanks,
Mohamed Ali

Le dim. 28 juin 2020 10:22, Mantas Mikulėnas <grawity at gmail.com> a écrit :

> On Sat, Jun 27, 2020 at 11:30 PM Mohamed Ali Fodha <
> fodha.mohamed.ali at gmail.com> wrote:
>
>> Hello,
>>
>> I noticed that mounting partition takes more time on yocto thud regarding
>> rocko.
>> I checked the dev-mmcblk0p2.device in my case using systemd-bootchart.
>> Is there any reason why this mouting delay was increased?
>>
>
> Either the kernel takes longer to *detect* the device in the first place
> (maybe partition scanning became slower?), or you have added udev rules
> which take a long time to be processed. There is no hardcoded mounting
> delay within systemd itself.
>
>
>> Where the dev-mmcblk0p2.device comes from? I am not able to locate it in
>> /lib/systemd/system, any help on this please?
>>
>
> .device units are virtual units which represent the state of udev
> database. The unit shows up whenever the kernel informs udev about a new
> device, but it only gets marked as "active (plugged)" when udev's rule
> processing for that device finishes.
>
> --
> Mantas Mikulėnas
>
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