Re: [ANNOUNCE] udev 0.1 release

Steven Dake
2003-04-11T23:22:11Z

Greg KH wrote:

>On Fri, Apr 11, 2003 at 03:43:12PM -0700, Steven Dake wrote:
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>>Lars Marowsky-Bree wrote:
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>>
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>>>On 2003-04-11T15:30:21,
>>> Steven Dake <sdake@mvista.com> said:
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>>>>There is no "spec" that states this is a requirement, however, telecom
>>>>customers require the elapsed time from the time they request the disk
>>>>to be used, to the disk being usable by the operating system to be 20
>>>>msec.
>>>>
>>>>
>>>>
>>>>
>>>Heh. Yes, I've read that spec, and some of it involves some good crack
>>>smoking
>>>;-) The current Linux scheduler will make that rather hard for you, you'll
>>>need hard realtime for such guarantees.
>>>
>>>
>>>
>>Its quite easy to do if you are not dependent upon spawning an entire
>>process to execute the insertion and creation even of the device node.
>>
>>
>
>Then have the telcos live with the static /dev that they have today :)
>
>
Unfortunately they are willing to live with devfs, but not a static
/dev.... There are problems with devfs which I'm sure your well aware
of which a dynamic /dev would solve... But performance is an important
goal.

>There's always a price to pay for new features...
>
>greg k-h
>
>Happily using his "pleasure boating" version of Linux...
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