On Thu, Oct 02, 2003 at 17:08:16 +0000, Tomaz Beltram wrote: > So, what do I have to call from my timer function in order that the waiting > process becomes signaled? I have tried wake_up_process() but it didn't work. You DON'T want to do that, because a signal would be delivered to userland. There were other replies to your original mail that suggested the right way to go. I only tried to explain whay your original method could not work. > Tomaz > > > >From: Jan Hudec <bulb@ucw.cz> > >To: Tomaz Beltram <tomazb@hotmail.com> > >CC: ruxyz@yahoo.com, kernelnewbies@nl.linux.org > >Subject: Re: how to interrupt waiting for a semaphore after a timeout > >Date: Thu, 2 Oct 2003 10:12:08 +0200 > > > >On Mon, Sep 29, 2003 at 12:02:40 +0000, Tomaz Beltram wrote: > >> I was looking for a more lightweight solution. I need timed semaphore > >down > >> from within a kernel module. The idea was to substitute down() with > >> down_interruptible() and check for the return value. I would then > >wake_up > >> the waiting process from another thread after some time. Dynamic timers > >> seem just perfect for this job. Obviously, I am not doing it the right > >way, > >> as the process remains locked. > > > >down_interruptible means it's interruptible with SIGNAL, so it returns > >only if signal_pending(). > > > >------------------------------------------------------------------------------- > > Jan 'Bulb' Hudec > > <bulb@ucw.cz> > > _________________________________________________________________ > Protect your PC - get McAfee.com VirusScan Online > http://clinic.mcafee.com/clinic/ibuy/campaign.asp?cid=3963 > ------------------------------------------------------------------------------- Jan 'Bulb' Hudec <bulb@ucw.cz> -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
