From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 755A1158538 for ; Fri, 28 Mar 2025 13:53:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743169992; cv=none; b=HmF9b+T+tki18INgeUYOWX6GnHdDxIC/imFleu+0nGdSkB2xJskd8FcXjNSZ2JShAL5eHa6kPMG3y1mqBW5x1mC9sFIJKKA/z31v+U11fDqk5083N+bW1nu7z6a16yO9XZuXqJ6jIbxGp4n5FfGJAnC+h8o+yyeCx8R8/kyyfDA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743169992; c=relaxed/simple; bh=QpQXk4zm5AZSqDMomscvAL2yt23D5+PTjvZd0kqYvwY=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=tloacdIKfsLrMvP2/PnujrSpVkDe/tT5z3egy1/TC9dVZ6mis2LW0YihSR5Gj6u1uu+QiFPJxd+ml0/Dyfyp7k7UXU6jehg6b8pMcCKxQl0DMZaWWPFRoEcAccq/MaxjO6qFDqVoSyYjui5N4/tAO/g4Jp3CVHKfopdvp9A5dPs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=UHn2qnfH; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="UHn2qnfH" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E6BC0C4CEE4; Fri, 28 Mar 2025 13:53:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1743169990; bh=QpQXk4zm5AZSqDMomscvAL2yt23D5+PTjvZd0kqYvwY=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=UHn2qnfHPf3NAnfDLwKcyuVBuHJjBRnNryMGE7Tko7GQBnb9SmfH7BjvSDgMCxV6P jMvcTvpErsqrTvoKnQBzutWoM57B/KzffAb78MwDhBJ6H+q3IuD+/7vFGb7FMt9sA8 KP17F+mDF8F5zj+4Z0z3bvoJB+BJr1mqurhvBJ2phbgqih1lKmt0kfYcgeHmXzpmcV P+g477Ybxm5xT0ZXcQOuUMF7KWJJXZ/eRRlChgDDCR8IsMHagm2174wMBxLreS0Ov6 vWj4F1Phfiv0CSpoo6sBXfcLcmJtVBHSylIMybut5ZcrDRPZHn41ZOgTDr4/D5zM2I BpFAMHHRFFLYA== Date: Fri, 28 Mar 2025 14:53:06 +0100 From: Ingo Molnar To: Borislav Petkov Cc: boris.ostrovsky@oracle.com, linux-kernel@vger.kernel.org, tglx@linutronix.de, mingo@redhat.com, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com Subject: Re: [PATCH 0/2] Clear AMD's microcode cache on load failure Message-ID: References: <20250327210305.1694664-1-boris.ostrovsky@oracle.com> <20250328134544.GAZ-aoCA03g9SygDnW@fat_crate.local> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250328134544.GAZ-aoCA03g9SygDnW@fat_crate.local> * Borislav Petkov wrote: > On Fri, Mar 28, 2025 at 02:36:14PM +0100, Ingo Molnar wrote: > > It would be a pretty common usecase to attempt to load the earlier > > version if the loading of a new one doesn't succeed, right? > > This is only for late loading and no one should do that anyway. > > And load failure almost never happens - unless you're a cloud guy doing > special hackery. > > So no need to expedite this as a fix - the majority does not care. Well, it's a regression over previous behavior, so it is a regression fix for an upstream change that is only a few weeks old, and it's an overall quality-of-life fix for those users that are affected. There's no exception to the expected upstreaming of regression fixes just because there's few users affected. Given how simple the fix looks, and how fresh the recent big microcode loading changes are to begin with, I think we should apply it to x86/urgent and then (maybe) it can be forwarded to -stable in a few weeks if there's no problems. (Or not.) Ie. my main point is that delaying it to v6.16 is not justified IMHO. Thanks, Ingo