Messages in this thread |  | | Date | Sat, 04 Nov 2000 12:07:34 -0500 | From | Jeff Garzik <> | Subject | Re: Locking Between User Context and Soft IRQs in 2.4.0 |
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Andi Kleen wrote: > All the MOD_INC/DEC_USE_COUNT are done inside the modules themselves. There > is nothing that would a driver prevent from being unloaded on a different > CPU while it is already executing in ->open but has not yet executed the add > yet or after it has executed the _DEC but it is still running in module code > Normally the windows are pretty small, but very long running interrupt > on one CPU hitting exactly in the wrong moment can change that.
Module unload calls unregister_netdev, which grabs rtnl_lock. dev->open runs under rtnl_lock.
Given this, how can the driver be unloaded if dev->open is running?
-- Jeff Garzik | Dinner is ready when Building 1024 | the smoke alarm goes off. MandrakeSoft | -/usr/games/fortune - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
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