From owner-freebsd-fs@FreeBSD.ORG Wed Jun 1 14:31:36 2011 Return-Path: Delivered-To: freebsd-fs@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id B96911065670; Wed, 1 Jun 2011 14:31:36 +0000 (UTC) (envelope-from avg@FreeBSD.org) Received: from citadel.icyb.net.ua (citadel.icyb.net.ua [212.40.38.140]) by mx1.freebsd.org (Postfix) with ESMTP id D71A38FC0A; Wed, 1 Jun 2011 14:31:35 +0000 (UTC) Received: from odyssey.starpoint.kiev.ua (alpha-e.starpoint.kiev.ua [212.40.38.101]) by citadel.icyb.net.ua (8.8.8p3/ICyb-2.3exp) with ESMTP id RAA06935; Wed, 01 Jun 2011 17:31:34 +0300 (EEST) (envelope-from avg@FreeBSD.org) Message-ID: <4DE64D45.5060100@FreeBSD.org> Date: Wed, 01 Jun 2011 17:31:33 +0300 From: Andriy Gapon User-Agent: Mozilla/5.0 (X11; U; FreeBSD amd64; en-US; rv:1.9.2.17) Gecko/20110504 Lightning/1.0b2 Thunderbird/3.1.10 MIME-Version: 1.0 To: Artem Belevich References: <0EFD28CD-F2E9-4AE2-B927-1D327EC99DB9@bitgravity.com> <4DE50811.5060606@FreeBSD.org> <4DE51DD3.6040602@FreeBSD.org> In-Reply-To: X-Enigmail-Version: 1.1.2 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: freebsd-fs@FreeBSD.org Subject: Re: ZFS: arc_reclaim_thread running 100%, 8.1-RELEASE, LBOLT related X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 01 Jun 2011 14:31:36 -0000 on 31/05/2011 22:21 Artem Belevich said the following: > On Tue, May 31, 2011 at 12:07 PM, David P Discher wrote: >> And from the conversation on this thread, there isn't any agreement on how to really fix it. > Andriy has proposed potential fix that would eliminate multiplication > of gethrtime result by hz and would delay overflow by few hundred > years. Should be good enough. Yeah, and here is a patch that implements the proposal (for head): http://people.freebsd.org/~avg/osol-lbolt.diff -- Andriy Gapon