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Message-ID: <CAHhAz+hDuENBKUXLnP9W4VzjtZL0xu6EA2LY_ZO6GShTpaLdaQ@mail.gmail.com> Date: Wed, 28 Oct 2015 12:11:38 +0530 From: Muni Sekhar <munisekharrms@...il.com> To: Clemens Ladisch <clemens@...isch.de> Cc: linux-kernel@...r.kernel.org Subject: Re: character driver - poll() timeout On Tue, Oct 27, 2015 at 8:48 PM, Clemens Ladisch <clemens@...isch.de> wrote: > Muni Sekhar wrote: >> On Tue, Oct 27, 2015 at 1:41 PM, Clemens Ladisch <clemens@...isch.de> wrote: >>> Muni Sekhar wrote: >>>> Is it possible to print the timeout value in character driver poll() API? >>> >>> No. Your driver's poll callback never waits. >>> >>> Why do you think you need this value? >> >> I need to find out when exactly driver's poll callback returned timeout. > > Your poll callback _cannot_ return a timeout. > > Why do you think you need this information for? During stress test, my test application fails and throws poll() timeout error. I need to debug what is the state of my driver during that time. I added prints in driver poll(), but I gets lots of debug prints if poll() timeout is more. So I am wonder if it is possible to get a single debug print for this scenario? > > > Regards, > Clemens -- Thanks, Sekhar -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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