From owner-freebsd-stable@FreeBSD.ORG Fri Oct 23 22:09:27 2009 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 714E3106566C for ; Fri, 23 Oct 2009 22:09:27 +0000 (UTC) (envelope-from jacob@whotookspaz.org) Received: from mail-yw0-f178.google.com (mail-yw0-f178.google.com [209.85.211.178]) by mx1.freebsd.org (Postfix) with ESMTP id 2E9828FC08 for ; Fri, 23 Oct 2009 22:09:26 +0000 (UTC) Received: by ywh8 with SMTP id 8so8336337ywh.3 for ; Fri, 23 Oct 2009 15:09:26 -0700 (PDT) Received: by 10.91.27.6 with SMTP id e6mr3646619agj.27.1256334130507; Fri, 23 Oct 2009 14:42:10 -0700 (PDT) Received: from kusanagi.whotookspaz.org (adsl-153-199-151.jax.bellsouth.net [70.153.199.151]) by mx.google.com with ESMTPS id 8sm306326yxb.43.2009.10.23.14.42.08 (version=TLSv1/SSLv3 cipher=RC4-MD5); Fri, 23 Oct 2009 14:42:09 -0700 (PDT) Message-ID: <4AE2232E.10406@whotookspaz.org> Date: Fri, 23 Oct 2009 17:42:06 -0400 From: Jacob Myers User-Agent: Thunderbird 2.0.0.23 (X11/20090901) MIME-Version: 1.0 To: Jaime Bozza References: In-Reply-To: X-Enigmail-Version: 0.95.7 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: "freebsd-stable@freebsd.org" , Scott Ullrich Subject: Re: Possible scheduler (SCHED_ULE) bug? X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 23 Oct 2009 22:09:27 -0000 Jaime Bozza wrote: [snip] > The additional information I have (over the PR) is that: > 1) Files over 64K cause the problem, not just larger files I thought it was over 1 MB or so. But maybe I'm wrong. ISTR that I couldn't trigger it with some images of around 70K. > 2) switching over to SCHED_4BSD eliminates the problem - system no longer locks. I will have to test this. This is indeed interesting... > 3) 7.2 amd64 doesn't have the problem - Tested a similar configuration and was not able to duplicate on amd64 at all. I can replicate this problem on FreeBSD 7.2/amd64 reliably. -- Jacob Myers | Website: http://whotookspaz.org Network Admin, Wilcox Technologies | Public key: 186A424A Using FreeBSD since 2007 | Public shell: http://bit.ly/42iGCR Answer a fool according to his folly, lest he be wise in his own conceit -- Proverbs, 26:5