From owner-freebsd-hackers@FreeBSD.ORG Tue Mar 13 20:27:05 2012 Return-Path: Delivered-To: hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id C7B4C106566B for ; Tue, 13 Mar 2012 20:27:05 +0000 (UTC) (envelope-from adrian.chadd@gmail.com) Received: from mail-yx0-f182.google.com (mail-yx0-f182.google.com [209.85.213.182]) by mx1.freebsd.org (Postfix) with ESMTP id 841D18FC0C for ; Tue, 13 Mar 2012 20:27:05 +0000 (UTC) Received: by yenl9 with SMTP id l9so1244590yen.13 for ; Tue, 13 Mar 2012 13:27:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:cc:content-type; bh=77+8EQ8aMw7rbXimvn+B4X6Xak80YXZY6VbNAVEjQjY=; b=T42wBPUZNWV2+3K8o5ISs/BjI1BF/F6olO3Q3HCpsdP1gnAP3Z4+q1Pp+rUg7P9ehD cmcBrxmb716zVfNNmebU5zzzVS1h2iOY2X5eq++gQAlMTwTonGtspBtlEkKl8sJ5OzvQ Yp2ZVgbkEWkK6ctPsB1/T8wkftnKFqFmyVerkyGVuTf2RZdH+SjPsm+NwnUWg6cYfTvS I10JnjT+d63A5EUFlEf9bXTrQJWfvAjkMiEuLyX8H9ehTfnfujRzLxejZGNsRAW+ns/H SD964HsI/hBJwpixuDqbZphQU66fY6JlEJYJAwAT32trQ8SBlZ1wy8eWWHsZui+CJbuj YkGw== MIME-Version: 1.0 Received: by 10.68.232.2 with SMTP id tk2mr182354pbc.68.1331670424418; Tue, 13 Mar 2012 13:27:04 -0700 (PDT) Sender: adrian.chadd@gmail.com Received: by 10.143.33.5 with HTTP; Tue, 13 Mar 2012 13:27:04 -0700 (PDT) In-Reply-To: <20120312181921.GF75778@deviant.kiev.zoral.com.ua> References: <20120312181921.GF75778@deviant.kiev.zoral.com.ua> Date: Tue, 13 Mar 2012 13:27:04 -0700 X-Google-Sender-Auth: fQjw_tLOL-qsL69M4QlGDO_FZ6E Message-ID: From: Adrian Chadd To: Konstantin Belousov Content-Type: text/plain; charset=ISO-8859-1 Cc: hackers@freebsd.org, Svatopluk Kraus Subject: Re: [vfs] buf_daemon() slows down write() severely on low-speed CPU X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 13 Mar 2012 20:27:05 -0000 On 12 March 2012 11:19, Konstantin Belousov wrote: > The 32MB is indeed around the lowest amount of memory where recent > FreeBSD can make an illusion of being useful. I am not sure how much > should the system be tuned by default for such configuration. Some -new- embedded wifi hardware is shipping with 16MB of RAM. Just saying, Adrian