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Date:      Fri, 30 Nov 2012 21:22:20 +1030
From:      "Daniel O'Connor" <doconnor@gsoft.com.au>
To:        Kevin Oberman <kob6558@gmail.com>
Cc:        mbsd <mbsd@isgroup.com.ua>, freebsd-stable@freebsd.org
Subject:   Re: How to clean up /
Message-ID:  <C31822CE-1DCA-42CA-AF27-1EE21E98423D@gsoft.com.au>
In-Reply-To: <CAN6yY1uwcUJi3Y4O=gJvf-e5obkgvzV3nn8HoCF54r0KvEzc9w@mail.gmail.com>
References:  <A802184434754A128800ECE0A900127B@CMOTUM25PC> <1354239860.19647.8.camel@eva02> <2A4F276A-B95D-4D03-86F4-0A7C5A06B9A9@gsoft.com.au> <CAN6yY1uwcUJi3Y4O=gJvf-e5obkgvzV3nn8HoCF54r0KvEzc9w@mail.gmail.com>

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On 30/11/2012, at 17:46, Kevin Oberman <kob6558@gmail.com> wrote:
>> It would be Really Nice (tm) if they could be put into /usr instead =
since there is virtually no benefit to them being in / (since they are =
only used for debugging).
>=20
> I have long wondered why the kernel debug symbols were moved into
> /kernel. The only thing I can come up with was the desire to retain
> symbols for kernel.old, which the old system deleted. I'm not sure,
> but I think the change was made when the symbols files were added for
> all of the modules. I'd meed to dig back in the archived to track down
> the change.
>=20
> In any case, it's hardly difficult to come up with a scheme for
> keeping symbols for the current and old kernels and modules in /var or
> /usr and keep / from exceeding a gig on an amd64 system. (No, it's not
> there today, but it's disturbingly close.).

I seem to recall that last time I thought about this the main problem =
was keeping them in sync..

Perhaps if you hashed the kernel and then created =
/usr/..../kerneldbg/$hash/ and created a symlink in /boot/kernel/debug =
to  /usr/..../kerneldbg/$hash

Then the debug tools don't need to be much smarter to find them and they =
should never end up looking at incorrect data. A make target or some =
other tool to clean up old symbol directories might be needed though.

> Moving the Linux emulation shadow root out of root would also help.


Yes, a symlink from /compat to /usr/compat by default would work I =
think.

--
Daniel O'Connor software and network engineer
for Genesis Software - http://www.gsoft.com.au
"The nice thing about standards is that there
are so many of them to choose from."
  -- Andrew Tanenbaum
GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C







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