netdev - Re: [PATCH v3 02/13] mm: introduce execmem_text_alloc() and execmem

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Message-ID: <CAPhsuW7y2T+tajK71NfYhquhGJKpLpL+EoxxzqrVhEuAamDH3w@mail.gmail.com>
Date: Thu, 21 Sep 2023 15:14:54 -0700
From: Song Liu <song@...nel.org>
To: Mike Rapoport <rppt@...nel.org>
Cc: linux-kernel@...r.kernel.org, Andrew Morton <akpm@...ux-foundation.org>, 
	Björn Töpel <bjorn@...nel.org>, 
	Catalin Marinas <catalin.marinas@....com>, Christophe Leroy <christophe.leroy@...roup.eu>, 
	"David S. Miller" <davem@...emloft.net>, Dinh Nguyen <dinguyen@...nel.org>, 
	Heiko Carstens <hca@...ux.ibm.com>, Helge Deller <deller@....de>, Huacai Chen <chenhuacai@...nel.org>, 
	Kent Overstreet <kent.overstreet@...ux.dev>, Luis Chamberlain <mcgrof@...nel.org>, 
	Mark Rutland <mark.rutland@....com>, Michael Ellerman <mpe@...erman.id.au>, 
	Nadav Amit <nadav.amit@...il.com>, "Naveen N. Rao" <naveen.n.rao@...ux.ibm.com>, 
	Palmer Dabbelt <palmer@...belt.com>, Puranjay Mohan <puranjay12@...il.com>, 
	Rick Edgecombe <rick.p.edgecombe@...el.com>, Russell King <linux@...linux.org.uk>, 
	Steven Rostedt <rostedt@...dmis.org>, Thomas Bogendoerfer <tsbogend@...ha.franken.de>, 
	Thomas Gleixner <tglx@...utronix.de>, Will Deacon <will@...nel.org>, bpf@...r.kernel.org, 
	linux-arm-kernel@...ts.infradead.org, linux-mips@...r.kernel.org, 
	linux-mm@...ck.org, linux-modules@...r.kernel.org, 
	linux-parisc@...r.kernel.org, linux-riscv@...ts.infradead.org, 
	linux-s390@...r.kernel.org, linux-trace-kernel@...r.kernel.org, 
	linuxppc-dev@...ts.ozlabs.org, loongarch@...ts.linux.dev, 
	netdev@...r.kernel.org, sparclinux@...r.kernel.org, x86@...nel.org
Subject: Re: [PATCH v3 02/13] mm: introduce execmem_text_alloc() and execmem_free()

On Mon, Sep 18, 2023 at 12:30 AM Mike Rapoport <rppt@...nel.org> wrote:
>
[...]
> +
> +/**
> + * enum execmem_type - types of executable memory ranges
> + *
> + * There are several subsystems that allocate executable memory.
> + * Architectures define different restrictions on placement,
> + * permissions, alignment and other parameters for memory that can be used
> + * by these subsystems.
> + * Types in this enum identify subsystems that allocate executable memory
> + * and let architectures define parameters for ranges suitable for
> + * allocations by each subsystem.
> + *
> + * @EXECMEM_DEFAULT: default parameters that would be used for types that
> + * are not explcitly defined.
> + * @EXECMEM_MODULE_TEXT: parameters for module text sections
> + * @EXECMEM_KPROBES: parameters for kprobes
> + * @EXECMEM_FTRACE: parameters for ftrace
> + * @EXECMEM_BPF: parameters for BPF
> + * @EXECMEM_TYPE_MAX:
> + */
> +enum execmem_type {
> +       EXECMEM_DEFAULT,

I found EXECMEM_DEFAULT more confusing than helpful.

Song

> +       EXECMEM_MODULE_TEXT = EXECMEM_DEFAULT,
> +       EXECMEM_KPROBES,
> +       EXECMEM_FTRACE,
> +       EXECMEM_BPF,
> +       EXECMEM_TYPE_MAX,
> +};
> +
[...]