linux-kernel - Re: [PATCH] powerpc/8xx: Map a second 8M text page at startup when needed.

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Message-ID: <20181220082403.GA25436@infradead.org>
Date:   Thu, 20 Dec 2018 00:24:03 -0800
From:   Christoph Hellwig <hch@...radead.org>
To:     Christophe Leroy <christophe.leroy@....fr>
Cc:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH] powerpc/8xx: Map a second 8M text page at startup when
 needed.

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?