Hi, On Wed, Jan 7, 2009 at 2:21 PM, PAtrick Gerber <kpa_i...@yahoo.fr> wrote: > Thanks for the information. > > I have tested with the example from http://linux.die.net/man/3/poll slightly > modified (see the attached file). > If I test pool on the "/sys/module/systest/sections/.data" file it seems to > work fine. But if I try the same test application with my attribute > (/sys/kernel/kobject_example/bar) created with the example from linux sources > (samples/kobject/kobject_example.c) the result is an event POLLERR.
> > Do you have any idea why ? Need I to add special code for support poll > syscall in my driver ? Of course you should implement poll syscall in kernel driver. But for kobject-example it could be a problem because you don't have a file operations in this example. But thats only my feeling ;) Example for poll : (ldd3 http://lwn.net/images/pdf/LDD3/ch06.pdf ) > > Thanks in advance > > --- En date de : Mer 7.1.09, Belisko Marek <marek.beli...@gmail.com> a écrit : > >> De: Belisko Marek <marek.beli...@gmail.com> >> Objet: Re: sysfs_notify & poll >> À: "PAtrick Gerber" <kpa_i...@yahoo.fr> >> Date: Mercredi 7 Janvier 2009, 13h59 >> Hi, >> >> On Wed, Jan 7, 2009 at 1:54 PM, PAtrick Gerber >> <kpa_i...@yahoo.fr> wrote: >> > Ok thanks. Usefull example. But I have another >> question: >> > >> > Need I to use poll or epoll ? I dont really understand >> the difference. >> epoll is a variant of poll that can be used either as Edge >> or Level >> Triggered interface and scales well to large numbers of >> watched fds. >> For beginnig you can use normal poll syscall. >> >> > >> > Thanks in advance for any help ! >> > >> > On Wed, Jan 7, 2009 at 9:40 AM, PAtrick Gerber >> <kpa_i...@yahoo.fr> wrote: >> >> Hello, >> >> >> >> I would like to try to use sysfs_notify() / poll() >> mechanism from my >> > driver >> >> to notify some events to my application. I'm >> looking for a tiny >> > example >> >> showing the use of this mechanism. >> >> >> >> The driver side with sysfs_notify seems quite >> simple but I have absolutely >> >> no idea about the application side. >> > >> > Fo poll method you canfind good description and also >> example at: >> > http://linux.die.net/man/3/poll >> > >> >> >> >> Thanks in advance >> >> >> >> Patrick >> >> >> > >> > thanks, >> > >> > Marek >> > >> > >> > >> > >> > >> > >> > >> >> thanks, >> >> Marek >> >> -- >> as simple as primitive as possible >> ---------------------------------------------- >> Marek Beliško - open-nandra >> Ruská Nová Ves 219 >> 08005 Prešov >> Slovakia >> http://open-nandra.com > > > thanks, Marek -- as simple as primitive as possible ---------------------------------------------- Marek Beliško - open-nandra Ruská Nová Ves 219 08005 Prešov Slovakia http://open-nandra.com N�����r��y����b�X��ǧu�ޙ���+a�{.n�+���z�ޖw�n'����j�b�ye�{������z��v�^�m���z�ޖw�n'���?
