Re: [ANNOUNCE] udev 0.1 release

Steven Dake
2003-04-11T22:18:07Z

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.

Its even more helpful for their applications if the call that hotswap
inserts blocks until the device is actually ready to use and available
in the filesystem. Another requirement of any system that attempts to
replace devfs would be this capability (vs constantly checking for the
device in the filesystem).

Greg KH wrote:

>On Fri, Apr 11, 2003 at 01:29:57PM -0700, Steven Dake wrote:
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>>It gets even worse, because performance of hotswap events on disk adds
>>is critical and spawning processes is incredibly slow compared to the
>>performance required by some telecom applications...
>>
>>
>
>It's critical that we quick name this disk within X milliseconds after
>it has been added to the system? What spec declares this?
>
>thanks,
>
>greg k-h
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