Messages in this thread | | | Subject | Re: [linux-usb] Re: USB device allocation | Date | Sat, 09 Oct 1999 23:26:52 -0400 | From | "Brandon S. Allbery KF8NH" <> |
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In message <Pine.LNX.3.96L.991009222830.8553B-100000@saveearly.weh.andrew.cmu .e du>, Bradley M Keryan writes: +----- | On Sat, 9 Oct 1999, Khimenko Victor wrote: | > In <19991008173618.E4163@sventech.com> Johannes Erdfelt (jerdfelt@sventech. | com) wrote: | > > There's 2 portions to devfs, the kernel portion and the user space | > > portion. I'm talking about putting all of this into the user space | > > portion, devfsd. | > | > It's not possible: userspace portion can not be awoked when you try to acce | ss | > non-existing file. | | Really? So how do the "venus" daemons of AFS, Arla, Coda, and Intermezzo | handle this? AFAIK, all four filesystems depend on user-space daemons to +--->8
They have kernel portions of the kind that Johannes is proposing to *remove* from devfs.
And unlike devfs, they need it: they are network filesystems, not virtual device trees. (Indeed, AFS and Arla, at least, don't even support devices.)
Also note that they differ from the current devfs setup: devfs doesn't notify the devfsd when a device is being *accessed*, only when it is created or removed.
-- brandon s. allbery os/2,linux,solaris,perl allbery@kf8nh.apk.net system administrator kthkrb,heimdal,gnome,rt allbery@ece.cmu.edu carnegie mellon / electrical and computer engineering kf8nh We are Linux. Resistance is an indication that you missed the point.
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