On 2016-01-16 12:00, Peter Korsgaard wrote: > >> We changed to devtmpfs by default in Buildroot quite some time ago, and > >> I'm pretty happy with it. > > We need to have dynamically created device nodes anyway - for managing > > permissions, being able to change names, etc. Because of that, devtmpfs > > is not enough to provide a full /dev. Since it's not enough, and > > creating the initial device nodes from our custom init is easy, we see > > little value in keeping it. So we got rid of the extra bloat :) > > Heh, "bloat": > > arm-none-eabi-size drivers/base/devtmpfs.o > text data bss dec hex filename > 1568 64 4 1636 664 drivers/base/devtmpfs.o > > Compared to the extra inodes and/or the busybox mknod applet + script, > it isn't too bad. I know it's not much, but we do like to disable anything that's completely useless for our purposes. :) Our code doesn't use busybox mknod. The stuff that creates the device nodes is written in C. > In Buildroot we support pure devtmpfs, mdev or udev (both with devtmpfs) > or static /dev for legacy setups. Yeah, for Buildroot devtmpfs makes sense. We don't use or support mdev, udev or static /dev. We also got rid of hotplug2 a while back ;) - Felix
