linux-kernel - Re: [patch 00/11] rseq: Optimize exit to user space

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: <877bz67u3j.ffs@tglx>
Date: Thu, 14 Aug 2025 00:08:32 +0200
From: Thomas Gleixner <tglx@...utronix.de>
To: Jens Axboe <axboe@...nel.dk>, LKML <linux-kernel@...r.kernel.org>
Cc: Michael Jeanson <mjeanson@...icios.com>, Mathieu Desnoyers
 <mathieu.desnoyers@...icios.com>, Peter Zijlstra <peterz@...radead.org>,
 "Paul E. McKenney" <paulmck@...nel.org>, Boqun Feng
 <boqun.feng@...il.com>, Wei Liu <wei.liu@...nel.org>
Subject: Re: [patch 00/11] rseq: Optimize exit to user space

On Wed, Aug 13 2025 at 15:36, Jens Axboe wrote:
> On 8/13/25 3:32 PM, Thomas Gleixner wrote:
>> Could you give it a test ride to see whether this makes a difference in
>> your environment?
>
> Yep, I'll give a spin.

Appreciated.

> If I recall correct, I'd see rseq at 2-3% of overall CPU time last I

I'm not surprised.

> tested. I'll try and do some pre/post numbers for some of the stuff I
> usually run.

Cool. Thanks

      tglx