Re: [Fwd: What do people think about not installing a stripped /kernel ?]
From: Giorgos Keramidas (keramida_at_freebsd.org)
Date: 10/20/04
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Date: Wed, 20 Oct 2004 18:45:45 +0300 To: Maxim Sobolev <sobomax@freebsd.org>
On 2004-10-20 17:57, Maxim Sobolev <sobomax@freebsd.org> wrote:
> : Subject: What do people think about not installing a stripped /kernel ?
> : Date: Mon, 18 Oct 2004 15:12:00 -0700 (PDT)
> : From: Matthew Dillon <dillon@apollo.backplane.com>
> : Newsgroups: dragonfly.kernel
> :
> : The only cost is disk space... e.g. 3MB stripped kernel verses 16MB
> : debug kernel. But the debug info isn't actually loaded into memory so
> : the kernel load time and memory overhead is the same as with the stripped
> : version.
> :
> : The issue is bug reports and kernel core dumps. I can't count the number
> : of times I have had to carefully instruct people to retrieve their
> : kernel.debug's for bug reporting purposes. And even my own debugging
> : would be more convenient if I didn't have to save off a separate copy of
> : the debug version of the kernel.
> :
> : What I'm thinking of doing is having the installkernel target install the
> : debug version rather then the stripped version unless told to install
> : the stripped version with a new option, e.g. 'options INSTALL_STRIPPED'.
> : We would ship full debug GENERIC kernels instead of stripped kernels.
> : i.e. we aren't getting rid of the ability to install a stripped kernel,
> : we just aren't making it the default any more.
> :
> : What do people think?
>
> I think that this is good idea which can be adapted for our 6-CURRENT as
> well. Disk space is so damn cheap today....
Putting aside the colorful arguments about the exact name of the knob, I say
this is a very good idea. Disk space is indeed cheap these days. For those
cases where disk space usage matters a lot, a simple setting in `make.conf'
might solve whatever seems a problem.
In all the machines that I have installed 6.X the size of the root partition
is more than 300 MB these days, which can hold at least 2-3 different kernels.
The euros/GB price of disks in Patras, Greece, where I live range from 0.43 to
1.12 euros:
DESCRIPTION | SIZE | PRICE | EURO/GB
--------------------------------------+------+--------+--------
WESTERN DIGITAL 7200rpm, 8MB buffer | 200 | 85.90 | 0.43
SEAGATE 7200rpm, 8MB buffer | 160 | 80.00 | 0.50
SEAGATE 7200rpm, 8MB buffer | 200 | 99.90 | 0.50
WESTERN DIGITAL 7200rpm, 8MB buffer | 120 | 64.50 | 0.54
EXCELSTORE 7200rpm, 2MB buffer | 80 | 43.90 | 0.55
WESTERN DIGITAL 7200rpm, 8MB buffer | 250 | 140.90 | 0.56
WESTERN DIGITAL 7200rpm, 2MB buffer | 80 | 45.90 | 0.57
MAXTOR 7200rpm, 8MB buffer | 200 | 116.00 | 0.58
SEAGATE 7200rpm, 8MB buffer | 120 | 72.00 | 0.60
MAXTOR 7200rpm, 8MB buffer | 160 | 99.00 | 0.62
SAMSUNG 7200rpm, 2MB buffer | 80 | 50.50 | 0.63
SEAGATE 7200rpm, 2MB buffer | 80 | 50.90 | 0.64
WESTERN DIGITAL 7200rpm, 8MB buffer | 80 | 51.50 | 0.64
MAXTOR 7200rpm, 8MB buffer | 120 | 89.00 | 0.74
MAXTOR 7200rpm, 16MB buffer | 250 | 189.00 | 0.76
MAXTOR 7200rpm, 16MB buffer | 300 | 229.00 | 0.76
EXCELSTORE 7200rpm, 2MB buffer | 40 | 39.90 | 1.00
WESTERN DIGITAL 7200rpm, 2MB buffer | 40 | 40.50 | 1.01
SAMSUNG 7200rpm, 2MB buffer | 40 | 41.90 | 1.05
WESTERN DIGITAL 7200rpm, 8MB buffer | 40 | 43.50 | 1.09
SEAGATE 7200rpm, 2MB buffer | 40 | 44.90 | 1.12
# Data obtained from the online store of http://www.plaisio.gr
# a couple of minutes ago.
That's not just cheap. It's dirt cheap, if you ask me. Bearing this in mind,
saving a little space in /boot/kernel is hardly worth the effort and the
trouble one has to go through in order to locate or compile a debugging kernel
when a bug creeps up.
- Giorgos
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- Previous message: Wilko Bulte: "Re: [Fwd: What do people think about not installing a stripped /kernel ?]"
- In reply to: Maxim Sobolev: "[Fwd: What do people think about not installing a stripped /kernel ?]"
- Next in thread: M. Warner Losh: "Re: [Fwd: What do people think about not installing a stripped /kernel ?]"
- Reply: M. Warner Losh: "Re: [Fwd: What do people think about not installing a stripped /kernel ?]"
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