linux-kernel - Re: [PATCH v6 00/15] x86-64: Stack protector and percpu improvements

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Message-ID: <Z7XE0P6ZFHxtlYXw@gmail.com>
Date: Wed, 19 Feb 2025 12:47:28 +0100
From: Ingo Molnar <mingo@...nel.org>
To: Uros Bizjak <ubizjak@...il.com>
Cc: Brian Gerst <brgerst@...il.com>, linux-kernel@...r.kernel.org,
	x86@...nel.org, "H . Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Borislav Petkov <bp@...en8.de>, Ard Biesheuvel <ardb@...nel.org>
Subject: Re: [PATCH v6 00/15] x86-64: Stack protector and percpu improvements


* Uros Bizjak <ubizjak@...il.com> wrote:

> > Thank you for doing this series - it all looks pretty good from my 
> > side and I've applied it experimentally to tip:x86/asm. I fixed up 
> > the trivial details other reviewers and me noticed.
> >
> > Note that the merge is tentative, it might still need a rebase if 
> > some fundamental problem comes up - but let's see how testing goes 
> > in -next.
> 
> I wonder if there would be any benefit if stack canary is put into 
> struct pcpu_hot?

It should definitely be one of the hottest data structures on x86, so 
moving it there makes sense even if it cannot be measured explicitly.

Thanks,

	Ingo