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 3CFEC205E2F for ; Thu, 15 May 2025 14:43:25 +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=1747320206; cv=none; b=K+HBZ6GO1Um8zRiK6jIdfFgRGgXhXtmvP61PV/uvCDhL01j68QAxoiPFzW90Q9LmL+9WYv1UAea2DrDxiRNAP54u9vHHI0QtOciqbmqDN6SukA4EHhQFAOsYS7IxjyxK2N+oaAT5BBRa7Y/wefgJ/jsLv+V8GazjRyjDIdV5U7Q= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747320206; c=relaxed/simple; bh=k7+W0i39WdRl8+FNoIWV12spyCIOO2TyZ6JMN7brH0A=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=sHZknyNScvIf3hRWVEg9HikyXGcvimNJeo2xLXZmpwdknuD/VM0ctnQjxL68UZzfxh21xnCjRC2fdHmsDt6UXYp1tIQI8gxN/qCu3WzqYM+DFz8/aoKNPzXvaQd2r3vFcWUxcF6NqPOccO/dpu8/cob6Zn+TpuGn2cF505hSlhQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=owiwUM2F; 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="owiwUM2F" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D2637C4CEEB; Thu, 15 May 2025 14:43:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1747320205; bh=k7+W0i39WdRl8+FNoIWV12spyCIOO2TyZ6JMN7brH0A=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=owiwUM2FSn/6vaVrA/J63v3yjkt2QQdbuSJZblD8TbSnHVkm+28BB+EpIDWBpiQpg oOHV4kP1JZbgZmQIdw6g39FSnKlLOLnNelHSEgNDvXeqiCQTt4JcTI/mr0TjjjPUqs 5CLKlEXFePrHCJaPh+wFvEgsH8Dl+KtPCi7md53fSjNnmfrwl1JgXDFKcOq+k+QSYq R6m9hol49/oFTpFOLSorrDLMfM6AIyVQEHYxDh7XMz/BNe3gclthPT+RyWwclXm5rQ F3vG2iLPk2TZjof3Wv9k/iofn4oaM1WqQTovU47vjWH5zqF6VijM4zqL6KY/me2J1N scf+WsCNbsOMg== Date: Thu, 15 May 2025 16:43:20 +0200 From: Ingo Molnar To: Dave Hansen Cc: linux-kernel@vger.kernel.org, "Ahmed S . Darwish" , Andrew Cooper , Ard Biesheuvel , Arnd Bergmann , Borislav Petkov , Dave Hansen , "H . Peter Anvin" , John Ogness , Linus Torvalds , Peter Zijlstra , Thomas Gleixner Subject: Re: [PATCH -v2 0/15] x86: Remove support for TSC-less and CX8-less CPUs Message-ID: References: <20250515085708.2510123-1-mingo@kernel.org> 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: * Dave Hansen wrote: > On 5/15/25 01:56, Ingo Molnar wrote: > > 80 files changed, 47 insertions(+), 14117 deletions(-) > > Thanks for doing this, Ingo. A lot of this code was sitting off on > the side and not causing _too_ many problems. But that was (I think) > mostly because it was being so lightly used. > > I've been using Linux since the late 90's. The oldest systems I ever > ran it on were i586's and they were old at the time. > > I suspect this is going to throw a couple more compile issues at us > to fix, that's par for the course on something like this. Ideally, > we'd wait for v6.16-rc1 for applying something of this magnitude. > What were your plans on when to apply it? Yeah, so the good news is that the bots have been build-testing this series for a few weeks, and besides an UML build issue that I fixed there were very few problems. (knock on wood) And since Linus asked for this and semi-acked it, I might try sending this in this merge window, if it's quiet enough from the x86 tree perspective. The diffstat is large, but as you too alluded to, it's 99.9% obsolete code that got very little testing in practice, so I don't think there's an elevated risk of regressions. But let's see how the v6.16 merge window goes? > In any case: > > Acked-by: Dave Hansen Thanks! Ingo