On Sat, Jan 8, 2011 at 14:19, Mikulas Patocka <mpatocka@xxxxxxxxxx> wrote: > On Fri, 7 Jan 2011, Greg KH wrote: >> > 4) the reference obtained at point 1) is dropped, kobject reference count >> > reaches zero and the release callback is called. But that callback points >> > to an unloaded module and causes a crash. >> > >> > How is it solved? Am I missing something? >> >> You have the code that creates and frees the object, to not be in the >> module that could have been unloaded. ÂIt's really just that simple. > > If the whole device mapper subsystem can be a module, where can I put the > code? > > I think a similar bug exists in md, it can also be unloaded as a module > and it has "release" method in its module code. If you still have data structures hanging around, these structures are supposed to take a reference on the module -- and you can not unload the module as long as this is the case. Kay -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
