linux-kernel - Re: [PATCH v4 00/18] kasan: x86: arm64: KASAN tag-based mode for x86

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Message-ID: <ebl5meuoksen5yzpzbc5lcafcgzy3esfq7c47puz4tefeskkos@f5wzzg4fjrfz>
Date: Wed, 13 Aug 2025 12:05:47 +0100
From: Kiryl Shutsemau <kas@...nel.org>
To: Maciej Wieczor-Retman <maciej.wieczor-retman@...el.com>
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Subject: Re: [PATCH v4 00/18] kasan: x86: arm64: KASAN tag-based mode for x86

On Wed, Aug 13, 2025 at 12:39:35PM +0200, Maciej Wieczor-Retman wrote:
> On 2025-08-13 at 09:16:29 +0100, Kiryl Shutsemau wrote:
> >On Tue, Aug 12, 2025 at 03:23:36PM +0200, Maciej Wieczor-Retman wrote:
> >> Compilation time comparison (10 cores):
> >> * 7:27 for clean kernel
> >> * 8:21/7:44 for generic KASAN (inline/outline)
> >> * 8:20/7:41 for tag-based KASAN (inline/outline)
> >
> >It is not clear if it is compilation time of a kernel with different
> >config options or compilation time of the same kernel running on machine
> >with different kernels (KASAN-off/KASAN-generic/KASAN-tagged).
> 
> It's the first one, I'll reword this accordingly.
> 
> When you said a while ago this would be a good thing to measure, did you mean
> the first or the second thing? I thought you meant the first one but now I have
> doubts.

I meant the second. We want to know how slow is it to run a workload
under kernel with KASAN enabled.

-- 
  Kiryl Shutsemau / Kirill A. Shutemov