linux-kernel - Re: [PATCH v2 00/12] mm: jit/text allocator

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Message-ID: <557b2205c6826ce00c4cb76d8d8679807eb0ff58.camel@intel.com>
Date:   Fri, 16 Jun 2023 17:02:50 +0000
From:   "Edgecombe, Rick P" <rick.p.edgecombe@...el.com>
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Subject: Re: [PATCH v2 00/12] mm: jit/text allocator

On Fri, 2023-06-16 at 11:50 +0300, Mike Rapoport wrote:
> From: "Mike Rapoport (IBM)" <rppt@...nel.org>
> 
> Hi,
> 
> module_alloc() is used everywhere as a mean to allocate memory for
> code.
> 
> Beside being semantically wrong, this unnecessarily ties all
> subsystmes
> that need to allocate code, such as ftrace, kprobes and BPF to
> modules and
> puts the burden of code allocation to the modules code.
> 
> Several architectures override module_alloc() because of various
> constraints where the executable memory can be located and this
> causes
> additional obstacles for improvements of code allocation.

I like how this series leaves the allocation code centralized at the
end of it because it will be much easier when we get to ROX, huge page,
text_poking() type stuff.

I guess that's the idea. I'm just catching up on what you and Song have
been up to.