From mboxrd@z Thu Jan 1 00:00:00 1970 From: Badalian Vyacheslav Subject: Re: deadlocks if use htb Date: Fri, 10 Oct 2008 16:54:59 +0400 Message-ID: <48EF50A3.7090607@bigtelecom.ru> References: <20081010075640.GA5204@ff.dom.local> <48EF4B72.8080305@trash.net> <48EF4BEE.7030400@trash.net> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: Jarek Poplawski , netdev@vger.kernel.org, Denys To: Patrick McHardy Return-path: Received: from mail.bigtelecom.ru ([87.255.0.61]:44290 "EHLO mail.bigtelecom.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755105AbYJJMzD (ORCPT ); Fri, 10 Oct 2008 08:55:03 -0400 In-Reply-To: <48EF4BEE.7030400@trash.net> Sender: netdev-owner@vger.kernel.org List-ID: Patrick McHardy =D0=BF=D0=B8=D1=88=D0=B5=D1=82: > Patrick McHardy wrote: >> Jarek Poplawski wrote: >>> On 10-10-2008 07:44, Badalian Vyacheslav wrote: >>>> Hello all! >>> >>> Hello Slavon, >>> >>>> Please look to if you have time: >>>> http://bugzilla.kernel.org/show_bug.cgi?id=3D11718 >>>> >>>> We have deadlocks at few PC one times in week. >>>> I can test any patches to detect and fix problem. >>>> Now i test 2.6.27-rc kernel at one PC. >>> >>> A similar bug was reported by Denys Fedoryshchenko but it wasn't fu= lly >>> diagnosed. Anyway it looks like hardware dependent. The patch below >>> can sometimes help. 2.6.27 may have this fixed too (some other way)= =2E >> >> I doubt its hardware related, whats happening is that the hrtimer >> insertion gets into an endless loop because the rb tree (or node) >> apparently has a loop. I went through the qdiscs' use of hrtimers >> again, but can't spot any error there. >> >> Denys, did your systems also have CONFIG_HIGH_RES_TIMERS=3Dn? > > Badalian, please try enabling CONFIG_DEBUG_OBJECTS and post the > results, if any. i have some results with CONFIG_HIGH_RES_TIMERS=3Dn and CONFIG_HIGH_RES_TIMERS=3Dy Ok... i recompile kernel... simple wait crash for reboot =3D) Now i have pc: 1. 2.6.27 with patch 2. 2.6.26.6 with htb_hysteresis=3D1 and CONFIG_DEBUG_OBJECTS=3Dn 3. 2.6.26.6 with htb_hysteresis=3D1 and CONFIG_DEBUG_OBJECTS=3Dy (wait = for crash for reboot) 4. 2 servers deadlocked and not rebooted after panic (2.6.26.5 kernel)... need for drive to its for reboot... 5. 4 pc with 2.6.24-rc7-git2 that also do equal shaping but not have crashes(its on other hardware) > --=20 > To unsubscribe from this list: send the line "unsubscribe netdev" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html >