Messages in this thread | | | Subject | Re: Weird wasting of time between ioctl() and ioctl dispatcher | From | Andi Kleen <> | Date | 27 Nov 2006 12:10:33 +0100 |
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"Cestonaro, Thilo \(external\)" <Thilo.Cestonaro.external@fujitsu-siemens.com> writes:
> I'm a developer for Fujitsu Siemens Computers, working on a program which has it's own kernel modules and userland components. > Now cause the program should be released we have done some testing and during this testphase a wierd wasting of time occured > during the call of the ioctl() in the userland component and the actuall entering of the dispatcher function in the module. > It takes 3 min. until the call at last enters my dispatcher.
Something else is holding the big kernel lock for that long. Most likely it's your own code. Consider using a ->unlocked_ioctl
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