From owner-freebsd-stable@FreeBSD.ORG Tue Dec 16 01:12:41 2014 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id C8368273; Tue, 16 Dec 2014 01:12:41 +0000 (UTC) Received: from mail-wg0-x236.google.com (mail-wg0-x236.google.com [IPv6:2a00:1450:400c:c00::236]) (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 582DA9CB; Tue, 16 Dec 2014 01:12:41 +0000 (UTC) Received: by mail-wg0-f54.google.com with SMTP id l2so16164948wgh.41 for ; Mon, 15 Dec 2014 17:12:39 -0800 (PST) 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=MDiCc1Ttz4v3WAsY8kL0n+vY5wRyfuuVItMy+1vvaF4=; b=evp5+et1ex8OTpu4lud1rI4E4oodTJZsDrnQ59t1U1uLhk0hSqSSYXbL2xhx3tTF8t xGHEyrOXYxa1kgzBB5EmHbV7M/5550Fxk3zK3H6C3bob0FYynBY+NAqfvWDznd+DvuRV sea1SMRcL2yBagpr3am3kMQkn93sO4VIqlHzgk7Kb9NPI9kEg2cBQfb6O7KUDW41xv/A IU7SqkNjwpLCvPcsoRrpS+hLOqCe4eOu4QtDk9+mDc77uVg65jhc+ALOI66XKGlbZfzX JCdGTsypHs0lx24mYzIT/seDGtBjq/VHUgCCKXoGf81PEThigjDLCXdUgwlxjrsfa7Yt zn/g== MIME-Version: 1.0 X-Received: by 10.180.80.133 with SMTP id r5mr255604wix.20.1418692359818; Mon, 15 Dec 2014 17:12:39 -0800 (PST) Sender: adrian.chadd@gmail.com Received: by 10.216.106.195 with HTTP; Mon, 15 Dec 2014 17:12:39 -0800 (PST) In-Reply-To: References: <1418579278.2026.9.camel@freebsd.org> <1418580756.2026.12.camel@freebsd.org> <847BD158-0867-4F5F-83A9-1651E77D29EF@mu.org> <1641407.80FsgLC8bS@overcee.wemm.org> Date: Mon, 15 Dec 2014 17:12:39 -0800 X-Google-Sender-Auth: 2pEo62JITqwpPFOAN-jEyq4r4Mk Message-ID: Subject: Re: i386 PAE kernel works fine on 10-stable From: Adrian Chadd To: Alfred Perlstein Content-Type: text/plain; charset=UTF-8 Cc: "freebsd-stable@freebsd.org" , Ian Lepore , Peter Wemm X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 16 Dec 2014 01:12:41 -0000 On 15 December 2014 at 16:33, Alfred Perlstein wrote: > >> On Dec 15, 2014, at 3:42 PM, Peter Wemm wrote: >> >> It's always been a 1GB/3GB split. It was never a problem until certain >> scaling defaults were changed to scale solely based on physical ram without >> regard for kva limits. > > Hmm the original patch I gave for that only changed scaling for machines with 64 bit pointers. Why was it that the 32 bit stuff was made to change? I recall this - I went digging; commit 7beb738c8a72cc197d3e898784afe3fba28f1834 removed that particular bit of autotuning based on the size of void *. Maybe this stuff is a little busted and we need to add some more config parameters? (Also, there's the vm space shift thing that also needed adjustment for memory-constrained systems. We've had do it on MIPS and low-memory (64mb, 128mb) RAM i386 systems.) -adrian