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From: Uros Bizjak <ubizjak@gmail.com>
To: "Christoph Lameter (Ampere)" <cl@gentwo.org>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
	 Dennis Zhou <dennis@kernel.org>, Tejun Heo <tj@kernel.org>,
	Andy Lutomirski <luto@kernel.org>,
	 Ingo Molnar <mingo@kernel.org>,
	Nadav Amit <nadav.amit@gmail.com>,
	Brian Gerst <brgerst@gmail.com>,
	 Denys Vlasenko <dvlasenk@redhat.com>,
	"H . Peter Anvin" <hpa@zytor.com>,
	 Linus Torvalds <torvalds@linux-foundation.org>,
	Peter Zijlstra <peterz@infradead.org>,
	 Thomas Gleixner <tglx@linutronix.de>,
	Borislav Petkov <bp@alien8.de>,
	 Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Subject: Re: [RFC PATCH 0/3] Enable strict percpu address space checks
Date: Mon, 12 Aug 2024 16:41:53 +0200	[thread overview]
Message-ID: <CAFULd4a+n4+t4rCTpsyvjd=tNfB-O_c0y9+tF-re1WJPz4JJrw@mail.gmail.com> (raw)
In-Reply-To: <35c12a89-6a9f-0e43-5b84-375ab428a8bc@gentwo.org>

On Tue, Aug 6, 2024 at 10:32 PM Christoph Lameter (Ampere)
<cl@gentwo.org> wrote:
>
> On Mon, 5 Aug 2024, Uros Bizjak wrote:
>
> > Also, the last patch hijacks __percpu tag and repurposes it as a named
> > address space qualifier. While this works surprisingly well in this RFC
> > patchset, I would really appreciate some help on how to rewrite this
> > hack into some "production ready" code.
>
> This looks like good work to find issues with per cpu macro usage. Per cpu
> macros are a bit esoteric and it would be a good benefit if you can
> get this done.

Thanks, I will do my best.

> Sadly I cannot help you much with the address space qualifier.

I have solved this in RFC v2, please see [1].

[1] https://lore.kernel.org/lkml/20240812115945.484051-1-ubizjak@gmail.com/

Thanks and best regards,
Uros.


      parent reply	other threads:[~2024-08-12 14:42 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-08-05 18:38 Uros Bizjak
2024-08-05 18:38 ` [RFC PATCH 1/3] percpu: Define __pcpu_typeof() Uros Bizjak
2024-08-05 18:39 ` [RFC PATCH 2/3] percpu: Assorted fixes found by strict percpu address space checks Uros Bizjak
2024-08-05 18:39 ` [RFC PATCH 3/3] percpu/x86: [RFH] Enable strict percpu checks via named AS qualifiers Uros Bizjak
     [not found] ` <35c12a89-6a9f-0e43-5b84-375ab428a8bc@gentwo.org>
2024-08-12 14:41   ` Uros Bizjak [this message]

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