linux-kernel - Re: [PATCH] x86/ACPI: invalidate all cache lines on ACPI C-state transitions

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Message-ID: <20250526134600.619-1-khaliidcaliy@gmail.com>
Date: Mon, 26 May 2025 13:45:33 +0000
From: Khalid Ali <khaliidcaliy@...il.com>
To: peterz@...radead.org
Cc: bp@...en8.de,
	dave.hansen@...ux.intel.com,
	hpa@...or.com,
	khaliidcaliy@...il.com,
	lenb@...nel.org,
	linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	mingo@...hat.com,
	rafael@...nel.org,
	tglx@...utronix.de,
	x86@...nel.org
Subject: Re: [PATCH] x86/ACPI: invalidate all cache lines on ACPI C-state transitions

> This is absolutely insane. This day and age, nobody should use WBINVD
> ever. We've managed to not do this for decades, and I'm thinking that
> either the SPEC is 'mistaken' or otherwise out of line with reality.

> If you hate performance, and you want to break things like CAT, feel
> free to put this in your own kernel.
Sorry, i made a mistake, i meant ACPI 6.4 and 6.5. I already resent this patch
please check the resended one.