From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965236AbXCOFWh (ORCPT ); Thu, 15 Mar 2007 01:22:37 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S965242AbXCOFWX (ORCPT ); Thu, 15 Mar 2007 01:22:23 -0400 Received: from ug-out-1314.google.com ([66.249.92.172]:29193 "EHLO ug-out-1314.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965389AbXCOFWF (ORCPT ); Thu, 15 Mar 2007 01:22:05 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:reply-to:user-agent:mime-version:to:subject:references:in-reply-to:content-type:content-transfer-encoding:from; b=kUZrqb5nsXS0SL3MiHSsz4mm3bHja9xo27giU2XgIskaGZBQiwk+r8H88AF24O+z7Zb8iOyRQkiIdLbeuZqcP3zsyOASGkRuRtgpiN5PkkJskZErgoZ6fMH4nxiBn+LwFZ6NnSY6AxXJDDDNNpg0blhb4acYuOiXc3YNBOtkgkk= Message-ID: <45F8D809.90300@atnn.ru> Date: Thu, 15 Mar 2007 08:22:17 +0300 Reply-To: kostik@atnn.ru User-Agent: Thunderbird 1.5.0.5 (Windows/20060719) MIME-Version: 1.0 To: linux-kernel@vger.kernel.org Subject: Re: kswapd & 2.4.21-47.0.0.1 References: <45F7FA3B.6070303@atnn.ru> <20070314220701.GQ943@1wt.eu> In-Reply-To: <20070314220701.GQ943@1wt.eu> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit From: Konstantin Kalin Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Well. I expected similar answer :) But unfortunately it's not my decision to use CentOS. Also I couldn't get RH customer support for some reasons. So anyway thank you for answer. Regards, Kostya. Willy Tarreau wrote: > Hello, > > On Wed, Mar 14, 2007 at 04:35:55PM +0300, Konstantin Kalin wrote: > >> Hello, All >> >> I have the following configuration: CentOS 3.8, kernel >> 2.4.21-41.0.01.EL, Dialogic boards. >> Sometimes a kernel panic happens. I setup netdump and got several crash >> dumps and logs. Backtrace shows that kswapd called BUG in try_to_unmap >> function. Unfortunately I couldn't upgrade the kernel because of >> proprietary Dialogic drivers which are precompiled. >> >> Could somebody help me? I tried to find similar issues in maillist and >> failed with it. There are a few messages but they describe another case. >> > > Well, I think you're trying to get both the cake and the money for it. > You use a vendor-specific stable kernel in order to get a high reliability > and good hardware support, but without paying for the customer support > associated with it, and when you have a problem you ask for free help > here where people don't know much about it (except for those who worked > on it). > > By trying to get all advantages, you're in the worst situation : you have > a bug with a kernel that nobody knows except the vendor, and you can't > beat the vendor for this. I don't know if CentOS offers community-based > support through mailing lists or such, but maybe you'd loose less time > and money by buying the smallest support contract from RH and ask them > to help you on this problem. > > >> As I understand the rmap.c are under active development and it's >> strongly been changing per each kernel version. Also if I understand >> correct rmap.c has appeared in the kernel 2.6.x and my version of the >> kernel is a backport by RedHat from 2.6 to 2.4. >> > > Nope, it was initially written for 2.4 by Rik van Riel, and supported > for a long time as a patch for these kernels. Later it got merged in > 2.4-ac which became a base for RHEL3. It was also merged in 2.6 but > I believe that it got important changes, though I'm not sure. > > >> Information about the crash is below. The specific of my system is a lot >> of java thread (up to 1500). >> > > I'm not sure that many people here will be able to provide you with much > help, unfortunately. > > Regards, > Willy > > > > >