linux-kernel - Re: [PATCH v5 4/4] entry: Inline syscall_exit_to_user

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: <Z85ruFUoBQM60Vd8@ghost>
Date: Sun, 9 Mar 2025 21:34:00 -0700
From: Charlie Jenkins <charlie@...osinc.com>
To: Thomas Gleixner <tglx@...utronix.de>
Cc: Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Huacai Chen <chenhuacai@...nel.org>,
	WANG Xuerui <kernel@...0n.name>,
	Peter Zijlstra <peterz@...radead.org>,
	Andy Lutomirski <luto@...nel.org>,
	Alexandre Ghiti <alexghiti@...osinc.com>,
	linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
	loongarch@...ts.linux.dev
Subject: Re: [PATCH v5 4/4] entry: Inline syscall_exit_to_user_mode()

On Sun, Mar 09, 2025 at 09:23:20AM +0100, Thomas Gleixner wrote:
> On Sat, Mar 08 2025 at 16:08, Charlie Jenkins wrote:
> > On Sat, Mar 08, 2025 at 01:37:30PM +0100, Thomas Gleixner wrote:
> >> On Wed, Mar 05 2025 at 16:43, Charlie Jenkins wrote:
> >> > Architectures using the generic entry code can be optimized by having
> >> > syscall_exit_to_user_mode inlined.
> >> 
> >> That's a pretty handwavy claim. What's the actual benefit in numbers?
> >
> > I put the numbers in the cover letter! Here is the data I gathered:
> 
> They should be in the change log as the cover letter is not part of what
> ends up in git.

Yes good point. I will add this data here in the next version of the patch.

- Charlie