"Jeff Garzik" wrote: > Theoretically, if you call unregister_netdev from rmmon, it should grab > rtnl_lock and then complete the operation for you. If that doesn't work > for you, it sounds like you are not setting up, or cleaning up, > something correctly. > > Basically... it sounds like there are still bugs in your driver that > need working out :) I followed the value of dev->refcnt and there is something strange. before the call to register_netdev it is set to 0 and after that it is increased to 1. but before the call to unregister_netdev it is somehow 2. How can I tell who is modifying it and when ? I tried using kdb to find out but it keeps hanging the machine. I wanted to place a breakpoint that will pop if a certain memory address is accessed so I did the following: static void *p; (global - at the top of my source file) EXPORT_SYMBOL (p); in my probe function: p = (void*) dev->refcnt; > insmod my_module > ksyms this showed that p is at address 0xd081ee90 then from within kdb: kdb> md 0xd081ee90 0xd081ee90 c470bedc ........ ........ kdb> bpha 0xc470bedc Forced Global Breakpoint at... kdb> go system hung Is there a way to place a breakpoint on a memory address access ? - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org
