From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-lpp01m010-f46.google.com ([209.85.215.46]:37340 "EHLO mail-lpp01m010-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750735Ab2HOBF6 (ORCPT ); Tue, 14 Aug 2012 21:05:58 -0400 Received: by lagy9 with SMTP id y9so557162lag.19 for ; Tue, 14 Aug 2012 18:05:54 -0700 (PDT) Message-ID: <502AF5E3.7080405@iki.fi> Date: Wed, 15 Aug 2012 04:05:39 +0300 From: Antti Palosaari MIME-Version: 1.0 To: htl10@users.sourceforge.net CC: linux-media@vger.kernel.org Subject: Re: small regression in mediatree/for_v3.7-3 - media_build References: <1344991485.62541.YahooMailClassic@web29404.mail.ird.yahoo.com> In-Reply-To: <1344991485.62541.YahooMailClassic@web29404.mail.ird.yahoo.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-media-owner@vger.kernel.org List-ID: On 08/15/2012 03:44 AM, Hin-Tak Leung wrote: > --- On Wed, 15/8/12, Antti Palosaari wrote: > >> On 08/15/2012 02:39 AM, Hin-Tak Leung >> wrote: >>> There seems to be a small regression on >> mediatree/for_v3.7-3 >>> - dmesg/klog get flooded with these: >>> >>> [201145.140260] dvb_frontend_poll: 15 callbacks >> suppressed >>> [201145.586405] usb_urb_complete: 88 callbacks >> suppressed >>> [201150.587308] usb_urb_complete: 3456 callbacks >> suppressed >>> >>> [201468.630197] usb_urb_complete: 3315 callbacks >> suppressed >>> [201473.632978] usb_urb_complete: 3529 callbacks >> suppressed >>> [201478.635400] usb_urb_complete: 3574 callbacks >> suppressed >>> >>> It seems to be every 5 seconds, but I think that's just >> klog skipping repeats and collapsing duplicate entries. This >> does not happen the last time I tried playing with the TV >> stick :-). >> >> That's because you has dynamic debugs enabled! >> modprobe dvb_core; echo -n 'module dvb_core +p' > >> /sys/kernel/debug/dynamic_debug/control >> modprobe dvb_usbv2; echo -n 'module dvb_usbv2 +p' > >> /sys/kernel/debug/dynamic_debug/control >> >> If you don't add dvb_core and dvb_usbv2 modules to >> /sys/kernel/debug/dynamic_debug/control you will not see >> those. >> >> I have added ratelimited version for those few debugs that >> are flooded normally. This suppressed is coming from >> ratelimit - it does not print all those similar debugs. > > I did not enable it - it is as shipped :-). > > # grep 'CONFIG_DYNAMIC' /boot/config* > /boot/config-3.4.6-2.fc17.x86_64:CONFIG_DYNAMIC_FTRACE=y > /boot/config-3.4.6-2.fc17.x86_64:CONFIG_DYNAMIC_DEBUG=y > /boot/config-3.5.0-2.fc17.x86_64:CONFIG_DYNAMIC_FTRACE=y > /boot/config-3.5.0-2.fc17.x86_64:CONFIG_DYNAMIC_DEBUG=y > /boot/config-3.5.1-1.fc17.x86_64:CONFIG_DYNAMIC_FTRACE=y > /boot/config-3.5.1-1.fc17.x86_64:CONFIG_DYNAMIC_DEBUG=y > > Now I wonder why I didn't have those usb_urb_complete messages before? The last time I played with mediatree was with 3.4.4-5.fc17.x86_64, and with the mediatree2/dvb_core branch - and I did not have these then. Yeah, you are correct. There is something wrong now. I see also those ratelimited debugs even didn't ordered... I think dev_dbg_ratelimited() is very new, there is no other users... I have to find out whats wrong. Now I am finalizing DVB USB reset_resume(). Very cool. Looks like I can now continue watching television even USB controller gets reseted during suspend (reset resume). Every DVB USB device I have here seems to survive both normal resume and reset resume =) regards Antti -- http://palosaari.fi/