From mboxrd@z Thu Jan 1 00:00:00 1970
Return-Path: <t.lamprecht@proxmox.com>
Received: from firstgate.proxmox.com (firstgate.proxmox.com [212.224.123.68])
(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)
key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256)
(No client certificate requested)
by lists.proxmox.com (Postfix) with ESMTPS id 3378B8AD4D
for <pve-devel@lists.proxmox.com>; Fri, 21 Oct 2022 17:25:28 +0200 (CEST)
Received: from firstgate.proxmox.com (localhost [127.0.0.1])
by firstgate.proxmox.com (Proxmox) with ESMTP id 136EC23D57
for <pve-devel@lists.proxmox.com>; Fri, 21 Oct 2022 17:24:58 +0200 (CEST)
Received: from proxmox-new.maurer-it.com (proxmox-new.maurer-it.com
[94.136.29.106])
(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)
key-exchange X25519 server-signature RSA-PSS (2048 bits))
(No client certificate requested)
by firstgate.proxmox.com (Proxmox) with ESMTPS
for <pve-devel@lists.proxmox.com>; Fri, 21 Oct 2022 17:24:57 +0200 (CEST)
Received: from proxmox-new.maurer-it.com (localhost.localdomain [127.0.0.1])
by proxmox-new.maurer-it.com (Proxmox) with ESMTP id CFFD344B0F
for <pve-devel@lists.proxmox.com>; Fri, 21 Oct 2022 17:24:56 +0200 (CEST)
Message-ID: <5f763876-88c8-97a0-0a3c-261baf381393@proxmox.com>
Date: Fri, 21 Oct 2022 17:24:55 +0200
MIME-Version: 1.0
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:106.0) Gecko/20100101
Thunderbird/106.0
Content-Language: en-GB
To: Proxmox VE development discussion <pve-devel@lists.proxmox.com>,
Fiona Ebner <f.ebner@proxmox.com>
References: <20220902124409.42944-1-f.ebner@proxmox.com>
From: Thomas Lamprecht <t.lamprecht@proxmox.com>
In-Reply-To: <20220902124409.42944-1-f.ebner@proxmox.com>
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 7bit
X-SPAM-LEVEL: Spam detection results: 0
AWL -0.034 Adjusted score from AWL reputation of From: address
BAYES_00 -1.9 Bayes spam probability is 0 to 1%
KAM_DMARC_STATUS 0.01 Test Rule for DKIM or SPF Failure with Strict Alignment
SPF_HELO_NONE 0.001 SPF: HELO does not publish an SPF Record
SPF_PASS -0.001 SPF: sender matches SPF record
URIBL_BLOCKED 0.001 ADMINISTRATOR NOTICE: The query to URIBL was blocked. See
http://wiki.apache.org/spamassassin/DnsBlocklists#dnsbl-block for more
information. [proxmox.com]
Subject: [pve-devel] applied: [RFC v2 kernel] backport patch to fix TSC
scaling for SVM
X-BeenThere: pve-devel@lists.proxmox.com
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Proxmox VE development discussion <pve-devel.lists.proxmox.com>
List-Unsubscribe: <https://lists.proxmox.com/cgi-bin/mailman/options/pve-devel>,
<mailto:pve-devel-request@lists.proxmox.com?subject=unsubscribe>
List-Archive: <http://lists.proxmox.com/pipermail/pve-devel/>
List-Post: <mailto:pve-devel@lists.proxmox.com>
List-Help: <mailto:pve-devel-request@lists.proxmox.com?subject=help>
List-Subscribe: <https://lists.proxmox.com/cgi-bin/mailman/listinfo/pve-devel>,
<mailto:pve-devel-request@lists.proxmox.com?subject=subscribe>
X-List-Received-Date: Fri, 21 Oct 2022 15:25:28 -0000
Am 02/09/2022 um 14:44 schrieb Fiona Ebner:
> The following issue reported on the community forum [0] is likely
> fixed by this.
>
> In my case, loading a VM snapshot that originally was taken on an
> Intel CPU on my AMD-based host often caused problems in other VMs. In
> particular, it often led to CPU stalls, and sometimes clock jumps far
> into the future. With this backport applied, everything seems to run
> smoothly even after loading the "bad" snapshot 10 times.
>
> The backport from upstream commit 11d39e8cc43e ("KVM: SVM: fix tsc
> scaling cache logic consisted of dropping the parts for nested TSC
> scaling, which is not yet present in our kernel, renaming the constant
> for the default ratio, and some context changes.
>
> [0] https://forum.proxmox.com/threads/112756/
>
> Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
> ---
>
> Changes from v1:
> * Alternative approach backporting the fix of the bad commit.
>
> ...-KVM-SVM-fix-tsc-scaling-cache-logic.patch | 113 ++++++++++++++++++
> 1 file changed, 113 insertions(+)
> create mode 100644 patches/kernel/0032-KVM-SVM-fix-tsc-scaling-cache-logic.patch
>
>
applied, thanks!