From: Borislav Petkov <bp@alien8.de>
To: Marcos Del Sol Vives <marcos@orca.pet>
Cc: "Ahmed S. Darwish" <darwi@linutronix.de>,
linux-kernel@vger.kernel.org,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>,
Dave Hansen <dave.hansen@linux.intel.com>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
Brian Gerst <brgerst@gmail.com>, Uros Bizjak <ubizjak@gmail.com>,
Ard Biesheuvel <ardb@kernel.org>,
David Kaplan <david.kaplan@amd.com>, Kees Cook <kees@kernel.org>,
"Peter Zijlstra (Intel)" <peterz@infradead.org>,
Andrew Cooper <andrew.cooper3@citrix.com>,
Oleg Nesterov <oleg@redhat.com>, "Xin Li (Intel)" <xin@zytor.com>,
Sabyrzhan Tasbolatov <snovitoll@gmail.com>
Subject: Re: [PATCH] x86: add hintable NOPs emulation
Date: Wed, 20 Aug 2025 12:08:12 +0200 [thread overview]
Message-ID: <20250820100812.GFaKWejCFMSAS6QIfS@fat_crate.local> (raw)
In-Reply-To: <3db7d599-c2a7-4bec-94b1-4872649dde8d@orca.pet>
On Wed, Aug 20, 2025 at 12:01:30PM +0200, Marcos Del Sol Vives wrote:
> Please define "once". Once per what? Per boot? Per executable? Per process?
pr_err_once(). Per boot.
> Once per boot would mean they'd need to reboot to see if any other executables
> are affected.
We'll cross that bridge when we get to it.
> (again, like IOPL emulation which was already deemed okay a couple years ago
> and merged into the kernel)
When it is flooding dmesg for no good reason, I wouldn't mind toning that down
too.
IOW, I wanna see a real, actual use case which justifies flooding dmesg. If
you don't have one, then we'll do it only when it is really warranted.
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
next prev parent reply other threads:[~2025-08-20 10:08 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-08-20 1:34 Marcos Del Sol Vives
2025-08-20 9:07 ` Peter Zijlstra
2025-08-21 12:28 ` David Laight
2025-08-21 12:46 ` Peter Zijlstra
2025-08-21 18:40 ` David Laight
2025-08-21 19:46 ` Marcos Del Sol Vives
2025-08-21 15:11 ` Marcos Del Sol Vives
2025-08-20 9:14 ` Ahmed S. Darwish
2025-08-20 9:33 ` Marcos Del Sol Vives
2025-08-20 9:43 ` Borislav Petkov
2025-08-20 9:51 ` Marcos Del Sol Vives
2025-08-20 9:55 ` Borislav Petkov
2025-08-20 10:01 ` Marcos Del Sol Vives
2025-08-20 10:08 ` Borislav Petkov [this message]
2025-08-20 10:21 ` Marcos Del Sol Vives
2025-08-20 10:30 ` Borislav Petkov
2025-08-21 2:00 ` Kees Cook
2025-08-20 10:11 ` Ahmed S. Darwish
2025-08-20 10:30 ` Ahmed S. Darwish
2025-08-21 1:43 ` H. Peter Anvin
2025-08-21 9:35 ` Marcos Del Sol Vives
2025-08-21 5:02 ` H. Peter Anvin
2025-08-21 12:26 ` David Laight
2025-08-21 12:48 ` Marcos Del Sol Vives
2025-08-21 12:48 ` Peter Zijlstra
2025-08-21 13:45 ` Marcos Del Sol Vives
2025-08-21 13:59 ` Peter Zijlstra
2025-08-22 22:12 ` H. Peter Anvin
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