Received: by 2002:ad5:474a:0:0:0:0:0 with SMTP id i10csp523383imu;
        Thu, 20 Dec 2018 00:34:11 -0800 (PST)
X-Google-Smtp-Source: AFSGD/VgMoCuQwTxi+Uhe1rKN9HVGlEc95ajMisCUhSAs/iSHv6H5mb2wI9neCWKAzq9Ih4arBJm
X-Received: by 2002:a62:520b:: with SMTP id g11mr23785951pfb.53.1545294851202;
        Thu, 20 Dec 2018 00:34:11 -0800 (PST)
ARC-Seal: i=1; a=rsa-sha256; t=1545294851; cv=none;
        d=google.com; s=arc-20160816;
        b=q329Tpclhy/xvJ8nSbrfp2d/P8chCH+lktad/BAAEI5p2F2FJh2f9OTB4KUryD8ils
         TQGuVYwAz6+/KyIYUlCIKswg1OYQMlSJ6n0npQp4hSy4imH6e6H1sZoDYcZW2WFmycn4
         BX6JvRNZLXU9biFvfEmF2o+yvsK9N5e7eQcg4Tl4gUSOKVRvXsb1ugYdKeFkMzQW7aUL
         mP8Iopmtk4Jhm+DQh7GAuDq4WOSa+4OSquRXqjwPN2dUDTADv2K+RKJWEIc8Fp3R97KC
         QJDUwo7pAHO5Vn/U8phP4TxqDR3Uakp/f9Sgke2S9O0yXNR8qBy+uWKrQEiJyKy2VzVy
         yEoQ==
ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816;
        h=list-id:precedence:sender:user-agent:in-reply-to
         :content-disposition:mime-version:references:message-id:subject:cc
         :to:from:date:dkim-signature;
        bh=PUxKvZ3nRgpmAu1KIWw+9VlfqH/pgkRRGLhzZ72s44c=;
        b=jzd9EiZkLUfayIm5kezdPdajOB4e654JJAv7v6SKXsWTLTGUcSf4AwZStZaXIn3Ye0
         SrLdj3/NArJIf4/C1oQNO48hVT8rjKIrDTLnhzvS0tGi1NuLaM17A8uc34oTe9Dw6Our
         u8EzuRtrJBA45TGm9Uhh8Yr6l+kuUvo+Vk8+TQsKhoXO2Lw03tZBejChlL4oE8aJwxST
         Lp7FQRswsBhbMuekeULXN/vLjyE0NwFzeYwOUWxUIaWNzTjCt39gfLsUq1DxPe1ZMOwW
         SMnGl+QPufg8A8pHIo06Gra17gROl+Ru7CUxaxATUz5td8H4bWQONDcPElEFH+7gkpZj
         kMwg==
ARC-Authentication-Results: i=1; mx.google.com;
       dkim=fail header.i=@infradead.org header.s=bombadil.20170209 header.b=VfS72XQz;
       spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67])
        by mx.google.com with ESMTP id n5si16170439pgl.485.2018.12.20.00.33.55;
        Thu, 20 Dec 2018 00:34:11 -0800 (PST)
Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Authentication-Results: mx.google.com;
       dkim=fail header.i=@infradead.org header.s=bombadil.20170209 header.b=VfS72XQz;
       spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S1730884AbeLTIYT (ORCPT <rfc822;uzarths@gmail.com> + 99 others);
        Thu, 20 Dec 2018 03:24:19 -0500
Received: from bombadil.infradead.org ([198.137.202.133]:38748 "EHLO
        bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
        with ESMTP id S1730872AbeLTIYR (ORCPT
        <rfc822;linux-kernel@vger.kernel.org>);
        Thu, 20 Dec 2018 03:24:17 -0500
DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed;
        d=infradead.org; s=bombadil.20170209; h=In-Reply-To:Content-Type:MIME-Version
        :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To:
        Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date:
        Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id:
        List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive;
         bh=PUxKvZ3nRgpmAu1KIWw+9VlfqH/pgkRRGLhzZ72s44c=; b=VfS72XQzNGnbcX9kKklRID8m0
        TXLbYVpMT6viemKcEHkxIJphTLCgxdIfp1zU2hPAGi65580Z+yNaX9DtbTVGmW9//y7lDCjfvzIdu
        uuhnqnTbKiAjmYicfOjPqWndFcdl9LYyMtShr5jQYQTBdKWsN51dR3eIt3JKYZ9l7DSn6K6rbSc2d
        DDDRxrm1Sq28nhcP+AEiXh/ET/iaGV0hYJc5CgI6DCXhcWNfFXbC7rxDRmZVK37lvSCbUUqtMHEki
        5OKSfkY8rzJyaVQxT/Q+SyZJgRFV8twYDl3RY9jmWPVyzWPEjraIBLLx1SXhmecb1POHqLvHf69mg
        UsR4J7BNA==;
Received: from hch by bombadil.infradead.org with local (Exim 4.90_1 #2 (Red Hat Linux))
        id 1gZtch-0006zW-DQ; Thu, 20 Dec 2018 08:24:03 +0000
Date:   Thu, 20 Dec 2018 00:24:03 -0800
From:   Christoph Hellwig <hch@infradead.org>
To:     Christophe Leroy <christophe.leroy@c-s.fr>
Cc:     Benjamin Herrenschmidt <benh@kernel.crashing.org>,
        Paul Mackerras <paulus@samba.org>,
        Michael Ellerman <mpe@ellerman.id.au>,
        linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH] powerpc/8xx: Map a second 8M text page at startup when
 needed.
Message-ID: <20181220082403.GA25436@infradead.org>
References: <27edd227d3b9dcda4e2ce7d00d9fddeb7a5520a1.1545241146.git.christophe.leroy@c-s.fr>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <27edd227d3b9dcda4e2ce7d00d9fddeb7a5520a1.1545241146.git.christophe.leroy@c-s.fr>
User-Agent: Mutt/1.9.2 (2017-12-15)
X-SRS-Rewrite: SMTP reverse-path rewritten from <hch@infradead.org> by bombadil.infradead.org. See http://www.infradead.org/rpr.html
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

On Thu, Dec 20, 2018 at 05:48:25AM +0000, Christophe Leroy wrote:
> Some debug setup like CONFIG_KASAN generate huge
> kernels with text size over the 8M limit.
> 
> This patch maps a second 8M page when _einittext is over 8M.

Do we also need a check to generate a useful warning if we ever overflow
the 16MB?