On Wed, Feb 05, 2003 at 11:51:24PM +0100, Jerome de Vivie wrote: > Erik Mouw wrote: > > Using files from kernel mode is policy, while the kernel should only > > implement mechanisms. Rethink your design so the file usage is done > > where it belongs: userland. This has the nice advantage that you can > > get the same information from weird locations like a remote SQL > > database by just rewriting the userland backend. There's no way to do > > this from kernel. > > The module implement a stackable filesystem (which should work over > NFS). I use a file because i need to store persistant data and i also > need to hide this file from userland. As I need to access some data very > frequently, i prefer using direct memory operation than read/write. All > thoses operations are protected by a mandatory. Persistent data really should be handled by a usermode helper, cause the decision *where* to store it is policy. See for example how alsactl handles the state of all ALSA soundcards in the system. See also how a couple of USB devices get their firmware uploaded through a generic device node. Erik -- J.A.K. (Erik) Mouw Email: J.A.K.Mouw@its.tudelft.nl mouw@nl.linux.org
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