Re: eudev hwdb?

[Martin Jansa <martin.jansa@gmail.com>]

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On Wed, Apr 27, 2016 at 10:48:03AM +0200, Gary Thomas wrote:
> I see that the replacement for udev (eudev) in OE-core takes nearly
> 12MB on my i.MX6 (ARM CortexA7).  This is nearly 25% of my total
> storage space (64MB NAND)!

See
http://permalink.gmane.org/gmane.comp.handhelds.openembedded.core/77244
and following discussions

> 
> # ls -lR /etc/udev
> /etc/udev:
> total 6520
> -rw-r--r-- 1 root root    1600 Jan  1  1970 cache.data
> -r--r--r-- 1 root root 6660476 Apr 26 13:08 hwdb.bin
> drwxr-xr-x 2 root root    1296 Apr 26 11:34 hwdb.d
> -rw-r--r-- 1 root root      51 Apr 26 11:31 mount.blacklist
> drwxr-xr-x 2 root root     160 Apr 26 11:35 mount.blacklist.d
> drwxr-xr-x 2 root root     608 Apr 26 13:08 rules.d
> drwxr-xr-x 2 root root     304 Apr 26 11:35 scripts
> -rw-r--r-- 1 root root      49 Apr 26 11:34 udev.conf
> 
> /etc/udev/hwdb.d:
> total 5224
> -rw-r--r-- 1 root root 1292931 Apr 26 11:34 20-OUI.hwdb
> -rw-r--r-- 1 root root  126596 Apr 26 11:34 20-acpi-vendor.hwdb
> -rw-r--r-- 1 root root   41289 Apr 26 11:34 20-bluetooth-vendor-product.hwdb
> -rw-r--r-- 1 root root     111 Apr 26 11:34 20-net-ifname.hwdb
> -rw-r--r-- 1 root root   13710 Apr 26 11:34 20-pci-classes.hwdb
> -rw-r--r-- 1 root root 2648842 Apr 26 11:34 20-pci-vendor-model.hwdb
> -rw-r--r-- 1 root root     783 Apr 26 11:34 20-sdio-classes.hwdb
> -rw-r--r-- 1 root root    4067 Apr 26 11:34 20-sdio-vendor-model.hwdb
> -rw-r--r-- 1 root root    8070 Apr 26 11:34 20-usb-classes.hwdb
> -rw-r--r-- 1 root root 1113001 Apr 26 11:34 20-usb-vendor-model.hwdb
> -rw-r--r-- 1 root root    3702 Apr 26 11:34 60-evdev.hwdb
> -rw-r--r-- 1 root root   52967 Apr 26 11:34 60-keyboard.hwdb
> -rw-r--r-- 1 root root   14217 Apr 26 11:34 70-mouse.hwdb
> -rw-r--r-- 1 root root    4627 Apr 26 11:34 70-pointingstick.hwdb
> 
> /etc/udev/mount.blacklist.d:
> total 0
> 
> /etc/udev/rules.d:
> total 20
> -rw-r--r-- 1 root root 1449 Apr 26 11:31 10-imx.rules
> -rw-r--r-- 1 root root    0 Apr 26 11:34 80-net-name-slot.rules
> -rw-r--r-- 1 root root  847 Apr 26 11:31 automount.rules
> -rw-r--r-- 1 root root  757 Apr 26 11:31 autonet.rules
> -rw-r--r-- 1 root root  885 Apr 26 11:34 local.rules
> -rw-r--r-- 1 root root  843 Apr 26 11:31 localextra.rules
> 
> /etc/udev/scripts:
> total 8
> -rwxr-xr-x 1 root root 2469 Apr 26 11:31 mount.sh
> -rwxr-xr-x 1 root root 1402 Apr 26 11:31 network.sh
> 
> Is there any way to not have both the hwdb.bin (which I assume
> is a binary version of the hardware databases) and /etc/udev/hwdb.d?
> Perhaps there is some way to only use one?
> 
> Or maybe there is a better choice, such as mdev?  I'm not sure about
> this (no experience) but my system needs to handle plug&play devices
> which the current eudev does well.  It's just a huge "price" to pay.
> 
> Any ideas or pointers would be great
> 
> -- 
> ------------------------------------------------------------
> Gary Thomas                 |  Consulting for the
> MLB Associates              |    Embedded world
> ------------------------------------------------------------
> -- 
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> yocto@yoctoproject.org
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-- 
Martin 'JaMa' Jansa     jabber: Martin.Jansa@gmail.com

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