From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261733AbULGCYd (ORCPT ); Mon, 6 Dec 2004 21:24:33 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261734AbULGCYc (ORCPT ); Mon, 6 Dec 2004 21:24:32 -0500 Received: from smtp-relay.dca.net ([216.158.48.66]:36517 "EHLO smtp-relay.dca.net") by vger.kernel.org with ESMTP id S261733AbULGCYa (ORCPT ); Mon, 6 Dec 2004 21:24:30 -0500 Date: Mon, 6 Dec 2004 21:24:29 -0500 From: "Mark M. Hoffman" To: LKML Subject: make -j4 gets stuck w/ ccache over NFS Message-ID: <20041207022429.GA5295@jupiter.solarsys.private> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hello: I'm using ccache version 2.4 [1]. I just changed ~/.ccache to a symbolic link to a directory which is NFS mounted [2]. The kernel source itself is on a local FS. With the ccache suitably primed, when I do a kernel compile using 'make -j4' it seems to get stuck for seconds at a time. When it gets unstuck, it blows through a handful of files and then gets stuck again. When it is stuck, both NFS client and server are almost totally idle. The network itself has almost no other traffic. It doesn't seem to matter if I mount NFS w/ udp or tcp (v3 in both cases). If I move ~/.ccache to a local FS, it never gets stuck. If I just use 'make' or even 'make -j2', (I'm pretty sure but not 100%) it never gets stuck. The NFS client is FC3 with kernel.org 2.6.10-rc3. I also tried it with -rc1, 2.6.9, and 2.6.8.1 - same problem. Weirdest part: when I boot the distro stock kernel (2.6.9-1.681_FC3smp) the problem goes away. Configs for all of the above are here [3]. Please CC me with replies - thanks! [1] http://ccache.samba.org/ [2] The NFS server uses kernel 2.4.28-rc2. [3] http://members.dca.net/mhoffman/lkml-20041213/ -- Mark M. Hoffman mhoffman@lightlink.com