From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jason Wang Subject: Re: [PATCHv 2] tcp: properly initialize tcp memory limits part 2 (fix nfs regression) Date: Tue, 06 Mar 2012 11:22:41 +0800 Message-ID: <4F558301.9000402@redhat.com> References: <1330675173-18968-1-git-send-email-slyich@gmail.com> <4F509150.5060904@redhat.com> <20120302202421.753b36bc@sf.home> <20120302205000.088bf231@sf.home> <4F5227C9.7060209@parallels.com> <20120303174322.7e920bc5@sf.home> <4F52A8D5.9090703@parallels.com> <20120304121400.4d756e55@sf.home> <4F545AC3.50004@redhat.com> <20120305212206.43f3abfa@sf.home> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Glauber Costa , linux-kernel@vger.kernel.org, netdev@vger.kernel.org, "David S. Miller" To: Sergei Trofimovich Return-path: In-Reply-To: <20120305212206.43f3abfa@sf.home> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org On 03/06/2012 02:22 AM, Sergei Trofimovich wrote: >> This one looks small to me, as the tcp_{r,w}mem were count by bytes and >> > limit were count by number of pages, so we need to shift PAGE_SHIFT. >> > >> > As I can't reproduce this locally, in order to narrow down the problem, >> > could you please help to check whether the issue were >> > introduced/eliminated by commit 4acb4190 or 3dc43e3? > I didn't think of server problem. I did run 3.3-rc0 kernel there > from the kvm tree (v3.2-10396-g05ef4c6): > commit 05ef4c60568ed1740f65bf66a76da30b19060119 > Author: Michael S. Tsirkin > Date: Wed Jan 18 20:07:09 2012 +0200 > > kvm: fix error handling for out of range irq > > from git://git.kernel.org/pub/scm/virt/kvm/kvm.git > > Updating to current vanilla 3.3-rc6 solved the problem. > Are you interested in digging that issue further to find commit > breaking the server? Hi Sergei: So it's very possible that it's a bug which is blacklisted by early commits and uncovered by my commit ( c43b874d5d714f271b80d4c3f49e05d0cbf51ed2). I wish I can help in nfs debugging, but I'm not familiar with that. thanks