linux-kernel - Re: [PATCH v5 7/8] execmem: add support for cache of large ROX pages

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Message-ID: <Zw0XnDHbpHDwFDHy@kernel.org>
Date: Mon, 14 Oct 2024 16:07:40 +0300
From: Mike Rapoport <rppt@...nel.org>
To: Christoph Hellwig <hch@...radead.org>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
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Subject: Re: [PATCH v5 7/8] execmem: add support for cache of large ROX pages

On Sun, Oct 13, 2024 at 10:55:25PM -0700, Christoph Hellwig wrote:
> On Sun, Oct 13, 2024 at 11:43:41AM +0300, Mike Rapoport wrote:
> > > But why?  That's pretty different from our normal style of arch hooks,
> > > and introduces an indirect call in a security sensitive area.
> > 
> > Will change to __weak hook. 
> 
> Isn't the callback required when using the large ROX page?  I.e.
> shouldn't it be an unconditional callback and not a weak override?

I'll add a Kconfig option to ensure that an architecture that wants to use
large ROX pages has explicit callback for that.

-- 
Sincerely yours,
Mike.