From owner-freebsd-emulation@FreeBSD.ORG Thu Aug 7 20:53:34 2014 Return-Path: Delivered-To: emulation@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id C4CA9128 for ; Thu, 7 Aug 2014 20:53:34 +0000 (UTC) Received: from mail-pa0-x229.google.com (mail-pa0-x229.google.com [IPv6:2607:f8b0:400e:c03::229]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 9D7FD25C0 for ; Thu, 7 Aug 2014 20:53:34 +0000 (UTC) Received: by mail-pa0-f41.google.com with SMTP id rd3so6055935pab.0 for ; Thu, 07 Aug 2014 13:53:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=bZqeoDwENpOABJ/ppNKSLXm/fKJO/cmJR/ql0COEbvA=; b=ZS+pTQsfIENE2xp5oMVYZ5TtvwBdrBaKGMUUXElZD25ZanF9yhBF2M2oPF4oARYPFr nKciBBoRk2/SqTcMEk2GJirad10AIxnwQ13r/6qoOtQMcLPKBagk0YnyFlFJ8iXveW8L 8mIYs5wQEcN18SsXNc8FbHo2w37v8pK0015vznyg3eg2Y7vJ2lIfn/PaOYQss+k1BdgG W1AU0sUvPbRe6sfRG6PUvWtX7J561ngoCH9OZSKvMREMc3oNIMfpaQapjac4UHMkZ6ge f6nmRrRIzdKpycuwmT2kQPk3h9Ydlqnxp5IVWF1s3HQn2Y0pEJslk2NILpq1vULlLN6R pmjg== MIME-Version: 1.0 X-Received: by 10.68.135.42 with SMTP id pp10mr19794608pbb.58.1407444814227; Thu, 07 Aug 2014 13:53:34 -0700 (PDT) Received: by 10.70.118.132 with HTTP; Thu, 7 Aug 2014 13:53:34 -0700 (PDT) In-Reply-To: <53E3C33E.5030004@sentex.net> References: <53E3C33E.5030004@sentex.net> Date: Thu, 7 Aug 2014 15:53:34 -0500 Message-ID: Subject: Re: Making disk IO place nicely in a guest (VirtualBox) From: Adam Vande More To: Mike Tancsa Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.18 Cc: "freebsd-emulation@freebsd.org" X-BeenThere: freebsd-emulation@freebsd.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Development of Emulators of other operating systems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 07 Aug 2014 20:53:34 -0000 On Thu, Aug 7, 2014 at 1:19 PM, Mike Tancsa wrote: > Hi, > I am running VirtualBox on RELENG_10 as the hypervisor with a > RELENG10 guest. I noticed, that when a do a lot of disk IO in the guest > where the hypervisor cannot keep up, this start to go "bad" in the guest. > > If I use the non default AHCI driver, the OS at least can kind of recover. > Using the default IDE drivers (non SATA , things panic quickly.) > > Is there a way to make the guest OS "slow down" on how fast it can write > out things to avoid it going into an error state as below ? > > Is your swap device ZFS backed like a ZVOL or something? -- Adam