How disable hwdb files in Yocto ?

[Raana]

Dear Team,

Right now, I'm doing rootfs optimization in Yocto 'sumo' version (L4.14.62).

Now, my extracted rootfs size is "81MB" (including kernel Image 11MB).

While doing rootfs optimization, I have seen many 'hwdb' file. It's taking around 14MB (7.3M    etc/udev/hwdb.bin and 5.9M    lib/udev/hwdb.d/).

My question is,

Is 'hwdb' really needed ?

How to disable it permanently in Yocto ?

Thank You.

Best Regards,

J.P.Raja

[shivanipatel · Accepted solution]

Hi, Raana‌

HWDB is mainly a database of device classes and vendors which generally prints udev properties to stdout.

You can remove these "hwdb" files in Yocto by adding following line in local.conf file.

• BAD_RECOMMENDATIONS += "udev-hwdb"

Regards,

Shivani

[MichaelBMiner]

Is there any major risk to removing udev-hwdb?

[Raana]

Hi Shivani,

Thanks a lot for your reply. It's working fine.
Will it cause any performance issue ?

Thank You.

Best Regards,

J.P.Raja

[MichaelBMiner]

I too am trying to trim my kernel size. udev-hwdb is the largest package I have installed. I will be removing it and testing the system. 

Did you ever run into any issues doing this?