Re: invalidating udev cache, how?

[Koen Kooi <k.kooi@student.utwente.nl>]

On 04-12-08 18:09, Mike (mwester) wrote:
> Mike (mwester) wrote:
>
>> A slight improvement would be to make the dev.tar file dependent upon
>> the bootargs; i.e. invalidate /etc/dev.tar file if the boot command line
>> doesn't match the current command line.  This could be a very fast
>> operation, just "cmp /proc/cmdline /etc/dev_cmdline" or similar.
>
> As I consider this further, we could actually just save and compare
> /proc/atags if that's present on the device in question (falling back to
> /proc/cmdline if not present).  That would catch *any* changes passed in
> to the kernel via the bootloader.
>
> Flashing a new kernel would seem to be another logical place to
> invalidate the cache, so adding a comparison of "uname -rv" would be a
> reasonable way to catch that.

That should indeed take care of bootargs and kernel version changes. I'm 
still tempted to add option 2) to all that :)

regards,

Koen