From owner-freebsd-hackers@FreeBSD.ORG Tue Oct 8 11:33:00 2013 Return-Path: Delivered-To: freebsd-hackers@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 ESMTP id 70213ABF; Tue, 8 Oct 2013 11:33:00 +0000 (UTC) (envelope-from davide.italiano@gmail.com) Received: from mail-vb0-x22c.google.com (mail-vb0-x22c.google.com [IPv6:2607:f8b0:400c:c02::22c]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id C489D2AD2; Tue, 8 Oct 2013 11:32:59 +0000 (UTC) Received: by mail-vb0-f44.google.com with SMTP id e13so4242044vbg.31 for ; Tue, 08 Oct 2013 04:32:58 -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:message-id:subject :from:to:cc:content-type; bh=OuHr7TWex/Sbadt7vrAlQRrC2ZPkTHCJis0MrkCsIBA=; b=T4onWRFk4+At0+tuuBRE2i1hM2AjKVhDBYeNXu45f7FK9EJZnrwOz/8Z08fscGFoj+ /MjIL2EumB5pfHQZD5HCw1jWVuJO69U3zeq3Pg+v+cPDI27e4tzJvoOBcXQGfbp1CMr+ v8zHA2IJAxmbL8OjSQB8FA5t9wm05ZAF/WdDsKt2RILsoH0NFj5DXXUKq8qZF8LpO8Jd TywhP0OByWyd1G3fjXvuSV0jZhwR8/B1nRvKG1J+YoMMLOqJe19aw/JdC+Tn79PsaGDT 5mOZ0HWPzH9P7c7YVmt5+YZ75bXqMoCz91B6+18O3KX/AQoZfa2qdYgLMe4QYigVt5Rd e/rQ== MIME-Version: 1.0 X-Received: by 10.220.188.66 with SMTP id cz2mr659434vcb.33.1381231978876; Tue, 08 Oct 2013 04:32:58 -0700 (PDT) Sender: davide.italiano@gmail.com Received: by 10.220.94.71 with HTTP; Tue, 8 Oct 2013 04:32:58 -0700 (PDT) In-Reply-To: References: <20130828181228.0d3618dd@ernst.home> <201309031507.33098.jhb@freebsd.org> <20131008063433.GA47506@x2.osted.lan> Date: Tue, 8 Oct 2013 13:32:58 +0200 X-Google-Sender-Auth: 7APWatQsQOZLqatgZexpPWzu7rc Message-ID: Subject: Re: Call fo comments - raising vfs.ufs.dirhash_reclaimage? From: Davide Italiano To: Adrian Chadd Content-Type: text/plain; charset=ISO-8859-1 Cc: Kirk McKusick , Alan Cox , Peter Holm , freebsd-fs@freebsd.org, Ivan Voras , freebsd-hackers X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 08 Oct 2013 11:33:00 -0000 On Tue, Oct 8, 2013 at 1:25 PM, Adrian Chadd wrote: > Hi, > Hi Adrian, > Please try it out on a -10 VM with something RAM limited - say, 128mb w/ > GENERIC. See how it behaves. > > I've successfully done buildworlds on 10-i386 with 128mb RAM. Let's try not > to break that before releng/10 is cut. > > thanks, > > This is not supposed to hit 10-STABLE, at least not before proper review. This is the reason why it was proposed on mailing lists. Also, if you read the patch you'll end up with realizing this should behave better on low memory environment because it unconditionally cleans 10% of the cache every time. Previous changes in this area just did the opposite keeping a lot more of memory around. I hope this makes sense to you. Thanks, -- Davide "There are no solved problems; there are only problems that are more or less solved" -- Henri Poincare