From: Kent Overstreet <kent.overstreet@linux.dev>
To: Song Liu <song@kernel.org>
Cc: linux-kernel@vger.kernel.org, bpf@vger.kernel.org,
mcgrof@kernel.org, peterz@infradead.org, tglx@linutronix.de,
x86@kernel.org, rppt@kernel.org
Subject: Re: [PATCH 0/3] Type aware module allocator
Date: Mon, 29 May 2023 14:25:09 -0400 [thread overview]
Message-ID: <ZHTuBdlhSI0mmQGE@moria.home.lan> (raw)
In-Reply-To: <CAPhsuW4DAwx=7Nta5HGiPTJ1LQJCGJGY3FrsdKi62f_zJbsRFQ@mail.gmail.com>
On Sat, May 27, 2023 at 10:58:37PM -0700, Song Liu wrote:
> I don't think we are exposing architecture specific options to users.
> Some layer need to handle arch specifics. If the new allocator is
> built on top of module_alloc, module_alloc is handling that. If the new
> allocator is to replace module_alloc, it needs to handle arch specifics.
Ok, I went back and read more thoroughly, I got this part wrong. The
actual interface is the mod_mem_type enum, not mod_alloc_params or
vmalloc_params.
So this was my main complaint, but this actually looks ok now.
It would be better to have those structs in a .c file, not the header
file - it looks like those are the public interface the way you have it.
> > The memory protection interface also needs to go, we've got a better
> > interface to model after (text_poke(), although that code needs work
> > too!). And the instruction fill features need a thorough justification
> > if they're to be included.
>
> I guess the first step to use text_poke() is to make it available on all
> archs? That doesn't seem easy to me.
We just need a helper that either calls text_poke() or does the page
permission dance in a single place.
If we do the same thing for other mod_mem_types, we could potentially
allow them to be shared on hugepages too.
next prev parent reply other threads:[~2023-05-29 18:25 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-26 5:15 [PATCH 0/3] Type aware module allocator Song Liu
2023-05-26 5:15 ` [PATCH 1/3] module: Introduce module_alloc_type Song Liu
2023-05-26 6:07 ` Randy Dunlap
2023-05-26 22:29 ` Kent Overstreet
2023-05-26 23:09 ` Song Liu
2023-05-26 23:39 ` Kent Overstreet
2023-05-27 0:03 ` Song Liu
2023-05-27 3:19 ` Kent Overstreet
2023-05-27 6:00 ` Song Liu
2023-05-26 5:15 ` [PATCH 2/3] ftrace: Add swap_func to ftrace_process_locs() Song Liu
2023-05-26 5:15 ` [PATCH 3/3] x86/module: Use module_alloc_type Song Liu
2023-05-27 7:04 ` [PATCH 0/3] Type aware module allocator Kent Overstreet
2023-05-28 5:58 ` Song Liu
2023-05-29 10:45 ` Mike Rapoport
2023-05-30 22:37 ` Song Liu
2023-05-31 13:51 ` Mike Rapoport
2023-05-31 17:03 ` Song Liu
2023-05-31 19:54 ` Mike Rapoport
2023-05-29 18:25 ` Kent Overstreet [this message]
2023-05-30 22:48 ` Song Liu
2023-06-01 17:53 ` Kent Overstreet
2023-06-01 18:21 ` Kent Overstreet
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