[oe] udev problems on angstrom-2008.1
Vasily Khoruzhick
anarsoul at gmail.com
Tue Sep 29 06:11:15 UTC 2009
В сообщении от 29 сентября 2009 06:01:52 автор Denys Dmytriyenko написал:
> Been there, done that.
> Short answer - you have too many requested devnodes for udev to handle
> within 32MB of RAM. If you absolutely need all the devices enabled in the
> kernel (try disabling/reducing LEGACY_PTY), consider replacing udev with
> mdev (or static devnodes). Or try moving udev's database from tmpfs into
> another partition, maybe on flash.
>
> Long answer - udev besides creating the actual devnodes also keeps its
> database in the same tmpfs filesystem. It consists of an internal directory
> structure with symlinks (a la sysfs) and is stored in /dev/.udev
> Keeping all that in tmpfs is not efficient, as it wastes inodes and
> apparently inodes in tmpfs/ramfs are the size of a memory page (4KB). By
> default tmpfs is limited to half the RAM, which in your case is 16MB. That
> would allow roughly 4000 inodes. You definitely need more, because of the
> above messages. Even if you fit all of them, using half of your available
> RAM just for udev is a total waste. So, consider suggestions above.
Oh, older versions of udev used to work here... I didn't expect it to take so
much RAM :)
Anyway, thanks for help.
Regards
Vasily
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