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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Fri, 16 Jun 2023 17:02:50 +0000
From:   "Edgecombe, Rick P" <rick.p.edgecombe@...el.com>
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "rppt@...nel.org" <rppt@...nel.org>
CC:     "tglx@...utronix.de" <tglx@...utronix.de>,
        "mcgrof@...nel.org" <mcgrof@...nel.org>,
        "deller@....de" <deller@....de>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "nadav.amit@...il.com" <nadav.amit@...il.com>,
        "linux@...linux.org.uk" <linux@...linux.org.uk>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-mips@...r.kernel.org" <linux-mips@...r.kernel.org>,
        "linux-riscv@...ts.infradead.org" <linux-riscv@...ts.infradead.org>,
        "hca@...ux.ibm.com" <hca@...ux.ibm.com>,
        "catalin.marinas@....com" <catalin.marinas@....com>,
        "kent.overstreet@...ux.dev" <kent.overstreet@...ux.dev>,
        "puranjay12@...il.com" <puranjay12@...il.com>,
        "linux-s390@...r.kernel.org" <linux-s390@...r.kernel.org>,
        "palmer@...belt.com" <palmer@...belt.com>,
        "chenhuacai@...nel.org" <chenhuacai@...nel.org>,
        "tsbogend@...ha.franken.de" <tsbogend@...ha.franken.de>,
        "linux-trace-kernel@...r.kernel.org" 
        <linux-trace-kernel@...r.kernel.org>,
        "linux-parisc@...r.kernel.org" <linux-parisc@...r.kernel.org>,
        "christophe.leroy@...roup.eu" <christophe.leroy@...roup.eu>,
        "x86@...nel.org" <x86@...nel.org>,
        "mpe@...erman.id.au" <mpe@...erman.id.au>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "rostedt@...dmis.org" <rostedt@...dmis.org>,
        "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
        "will@...nel.org" <will@...nel.org>,
        "dinguyen@...nel.org" <dinguyen@...nel.org>,
        "naveen.n.rao@...ux.ibm.com" <naveen.n.rao@...ux.ibm.com>,
        "sparclinux@...r.kernel.org" <sparclinux@...r.kernel.org>,
        "linux-modules@...r.kernel.org" <linux-modules@...r.kernel.org>,
        "bpf@...r.kernel.org" <bpf@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "song@...nel.org" <song@...nel.org>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "loongarch@...ts.linux.dev" <loongarch@...ts.linux.dev>,
        "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>
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.