Date: Thu, 30 Oct 2014 09:14:31 +0000 From: Steven Hartland <killing@multiplay.co.uk> To: "O'Connor, Daniel" <Daniel.O'Connor@emc.com> Cc: FreeBSD Current <freebsd-current@freebsd.org>, Ed Maste <emaste@freebsd.org>, Steve Kargl <sgk@troutmask.apl.washington.edu> Subject: Re: HEADS UP: Standalone kernel debug files moving out of /boot/kernel/ Message-ID: <54520177.5000008@multiplay.co.uk> In-Reply-To: <076D8745-53C6-4AFE-86D3-FF9B94F4EC76@emc.com> References: <CAPyFy2APVUxpAztmWY-ux7gUZ7B8Qk65CLHV_fVYmxsazKgCPg@mail.gmail.com> <54511A7E.1020307@multiplay.co.uk> <CAPyFy2Bw9JH4w0iZ5hj2R1Ga9T4BZn_Z-8UBJ-jT6tmO%2Bi8VeA@mail.gmail.com> <20141030023224.GA42236@troutmask.apl.washington.edu> <5451A843.90805@multiplay.co.uk> <076D8745-53C6-4AFE-86D3-FF9B94F4EC76@emc.com>
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On 30/10/2014 08:24, O'Connor, Daniel wrote:
> On 30 Oct 2014, at 13:23, Steven Hartland <killing@multiplay.co.uk> wrote:
>> Making things harder to manage vs saving a little bit of space on the
>> root partition really doesn't sound like a good idea; especially when
>> with the ZFS install, which I would suggest is becoming the norm, the
>> root partition doesn't suffer from space issues anyway.
> Note that it’s not “a little bit” of space.
> [freebsd10 8:21] /boot/kernel >ll kernel *.ko| awk '{i += $5} END {print $5}'
> 49312
> [freebsd10 8:21] /boot/kernel >ll *.symbols | awk '{i += $5} END {print $5}’
> 212464
>
> i.e. the debug information is more than 4x larger than the code its for (!).
That's still a trivial about of space in the grand scheme of things.
> I agree managing the symbol files does become significantly more difficult in this case but the patch makes quite a substantial difference to the number of kernels you can keep in / (especially on older installs which have <1GB roots).
The better solution is to not use a 1GB root.
> Perhaps there could be a flag to disable it just for the kernel that could be put into /etc/make.conf? That way it’s set and forget if you are kernel juggling.
Making it a none default option which can be used by those who have got
limited space on their root.
Regards
Steve
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