From owner-svn-src-all@FreeBSD.ORG Thu Nov 1 10:42:15 2012 Return-Path: Delivered-To: svn-src-all@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 3706F265; Thu, 1 Nov 2012 10:42:15 +0000 (UTC) (envelope-from asmrookie@gmail.com) Received: from mail-lb0-f182.google.com (mail-lb0-f182.google.com [209.85.217.182]) by mx1.freebsd.org (Postfix) with ESMTP id 1AC2E8FC0A; Thu, 1 Nov 2012 10:42:13 +0000 (UTC) Received: by mail-lb0-f182.google.com with SMTP id b5so2198076lbd.13 for ; Thu, 01 Nov 2012 03:42:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:reply-to:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:cc:content-type; bh=++2DOmMY1eVylm043dNOoZwiH72DMI07hpP0CjY5kPw=; b=dvv+6aEoCHawdX/Q7t3LdUfrDwHQF0Pqvz11SQ7J2UXMxg8r1UYCWjK0p8rXAEE5Gr rd9UW2k5dVlUno99w6n0A5c2f82lN3sXt9f0+8CdcsHUV4y4VYof5dKuz69pKMIUoc4w fGES734rDW7FkzmBVdF2UGQ0qao7ExL21E9DGbJ3R/bg7ywgvjM1H5Pq2BFsr4qokr3J gp3SwR1PbLUlfhIQBTdwvi7Ty/IyYnC1EG+WWpxE4TE2lJ848pntIEaD2Ze95enG0Rwf kiy/H3ixumYdivCksXevkF3wAMKXwRJlVSwlIlKafDCidBTyJygmjptbXqBY1UgWE1D4 VH3A== MIME-Version: 1.0 Received: by 10.112.41.36 with SMTP id c4mr15042418lbl.75.1351766527139; Thu, 01 Nov 2012 03:42:07 -0700 (PDT) Sender: asmrookie@gmail.com Received: by 10.112.30.37 with HTTP; Thu, 1 Nov 2012 03:42:07 -0700 (PDT) In-Reply-To: <20121101100814.GB70741@FreeBSD.org> References: <201210311807.q9VI7IcX000993@svn.freebsd.org> <1351707964.1120.97.camel@revolution.hippie.lan> <20121101100814.GB70741@FreeBSD.org> Date: Thu, 1 Nov 2012 10:42:07 +0000 X-Google-Sender-Auth: znGBs9oeJoOPTzs8g_KKQMH8omc Message-ID: Subject: Re: svn commit: r242402 - in head/sys: kern vm From: Attilio Rao To: Gleb Smirnoff Content-Type: text/plain; charset=UTF-8 Cc: svn-src-head@freebsd.org, Ian Lepore , svn-src-all@freebsd.org, src-committers@freebsd.org X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list Reply-To: attilio@FreeBSD.org List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 01 Nov 2012 10:42:15 -0000 On 11/1/12, Gleb Smirnoff wrote: > On Wed, Oct 31, 2012 at 06:33:51PM +0000, Attilio Rao wrote: > A> > Doesn't this padding to cache line size only help x86 processors in an > A> > SMP kernel? I was expecting to see some #ifdef SMP so that we don't > pay > A> > a big price for no gain in small-memory ARM systems and such. But > maybe > A> > I'm misunderstanding the reason for the padding. > A> > A> I didn't want to do this because this would be meaning that SMP option > A> may become a completely killer for modules/kernel ABI compatibility. > > Do we support loading non-SMP modules on SMP kernel and vice versa? Actually that's my point, we do. Attilio -- Peace can only be achieved by understanding - A. Einstein