On Fri, 6 May 2011 21:39:16 +0200 Olaf Hering <olaf at aepfle.de> wrote: > On Fri, May 06, Andrew Morton wrote: > > > So as your module will have a reference to vmcore.c's register and unregister > > functions, nothing needs to be done: the presence of the client module alone > > will pin the vmcore.c module. > > I meant the other way around. Keep /proc/vmcore open and read from it, > then try to rmmod foo.ko which provides fn(). > The client foo.ko will need to prevent itself from being unloaded while it's actively doing stuff, yes. Typically that would be done in its module_exit() function - wait for current activity to complete and block new activity. The "block new activity" thing should be automatic because nobody has any more references to anything in the module.
