svn commit: r239569 - head/etc/rc.d

Doug Barton dougb at FreeBSD.org
Wed Sep 12 20:48:55 UTC 2012


On 9/12/2012 4:43 AM, Ian Lepore wrote:
> On Tue, 2012-09-11 at 17:07 -0700, David O'Brien wrote:
>> On Tue, Sep 11, 2012 at 04:22:24PM -0700, Xin Li wrote:
>>> Please consider using sha512...
>>
>> What is the performance (boot time) impact on low-end MIPS and ARM
>> systems?
>>
>> I'm all for sha512, but don't want to be shot with a machine gun (vs.
>> simple pistol).
>>
> 
> For the embedded systems I take care of, the performance problem on
> low-end systems is likely to be solved by ignoring all of this angels
> dancing on a pin stuff and supplying an alternate kickstart mechanism
> appropriate to the way the system is used (which almost surely won't be
> in any national security datacenter).
> 
> I can assure you that neither shaXXX nor gzip nor anything else that
> eats that many cycles will be involved. :)
> 
> I just hope one of things coming out of all this is a reasonable
> mechanism for supplying alternate kickstart data.

I haven't yet heard any feedback on my suggestion to have one set of
default "safe" commands that are low-impact enough for embedded systems,
and another set to be added by default to more standard systems.

Do you think that this would address your concerns Ian?

Doug



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