On 11/11/13, 6:12 AM, Burton, Ross wrote:
On 11 November 2013 02:52, ChenQi <qi.c...@windriver.com> wrote:
The problem here is that the init scripts under /etc/rcS.d/ need to execute
commands like awk, dirname, and readlink which are from /usr.

Yes.  So why do you really need to support split /usr, and why isn't
an initramfs a suitable alternative?  People seem to insist that split
/usr is trivial but these patches are clearly showing it's not.

Just to be clear, I've never said it was trivial -- but what I have said is that it -should- be trivial if people pay attention to this stuff early.

The only thing that has to be done for the split is 'early boot'. (See my email response to Phil..)

As for why, we still have people developing systems with small per-device memory that need to do the early boot from a small system, then mount the /usr partition from a shared location. (/usr is often times still mounted RO.. and is shared between multiple CPUs within a single device or chasis.)

The usage of this is getting less and less, but we do still get issues from customers when things don't work right, so we know people are still doing it.

--Mark

Ross
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