Re: [ANNOUNCE] udev 0.1 release

[Steven Dake <sdake@mvista.com>]

Greg KH wrote:

>On Fri, Apr 11, 2003 at 03:43:12PM -0700, Steven Dake wrote:
>  
>
>>Lars Marowsky-Bree wrote:
>>
>>    
>>
>>>On 2003-04-11T15:30:21,
>>> Steven Dake <sdake@mvista.com> said:
>>>
>>>
>>>
>>>      
>>>
>>>>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...
>
>
>
>  
>