linux-kernel - Re: [PATCH 12/13] x86/jitalloc: prepare to allocate exectuatble memory as ROX

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]

Message-ID: <20230604225244.65be9103@rorschach.local.home>
Date:   Sun, 4 Jun 2023 22:52:44 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Nadav Amit <nadav.amit@...il.com>
Cc:     "Edgecombe, Rick P" <rick.p.edgecombe@...el.com>,
        "kent.overstreet@...ux.dev" <kent.overstreet@...ux.dev>,
        Thomas Gleixner <tglx@...utronix.de>,
        "mcgrof@...nel.org" <mcgrof@...nel.org>,
        "deller@....de" <deller@....de>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "linux@...linux.org.uk" <linux@...linux.org.uk>,
        "linux-mips@...r.kernel.org" <linux-mips@...r.kernel.org>,
        "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
        "hca@...ux.ibm.com" <hca@...ux.ibm.com>,
        "catalin.marinas@....com" <catalin.marinas@....com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-riscv@...ts.infradead.org" <linux-riscv@...ts.infradead.org>,
        "linux-s390@...r.kernel.org" <linux-s390@...r.kernel.org>,
        "palmer@...belt.com" <palmer@...belt.com>,
        "chenhuacai@...nel.org" <chenhuacai@...nel.org>,
        "mpe@...erman.id.au" <mpe@...erman.id.au>,
        "x86@...nel.org" <x86@...nel.org>,
        "tsbogend@...ha.franken.de" <tsbogend@...ha.franken.de>,
        "rppt@...nel.org" <rppt@...nel.org>,
        "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>,
        Will Deacon <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>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH 12/13] x86/jitalloc: prepare to allocate exectuatble
 memory as ROX

On Thu, 1 Jun 2023 16:54:36 -0700
Nadav Amit <nadav.amit@...il.com> wrote:

> > The way text_poke() is used here, it is creating a new writable alias
> > and flushing it for *each* write to the module (like for each write of
> > an individual relocation, etc). I was just thinking it might warrant
> > some batching or something.  

Batching does exist, which is what the text_poke_queue() thing does.

-- Steve