From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from firstgate.proxmox.com (firstgate.proxmox.com [212.224.123.68]) by lore.proxmox.com (Postfix) with ESMTPS id C24901FF17E for ; Thu, 13 Nov 2025 16:50:47 +0100 (CET) Received: from firstgate.proxmox.com (localhost [127.0.0.1]) by firstgate.proxmox.com (Proxmox) with ESMTP id 709FE21A86; Thu, 13 Nov 2025 16:51:35 +0100 (CET) From: Fiona Ebner To: pve-devel@lists.proxmox.com Date: Thu, 13 Nov 2025 16:51:09 +0100 Message-ID: <20251113155127.591195-4-f.ebner@proxmox.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20251113155127.591195-1-f.ebner@proxmox.com> References: <20251113155127.591195-1-f.ebner@proxmox.com> MIME-Version: 1.0 X-Bm-Milter-Handled: 55990f41-d878-4baa-be0a-ee34c49e34d2 X-Bm-Transport-Timestamp: 1763049064823 X-SPAM-LEVEL: Spam detection results: 0 AWL -0.019 Adjusted score from AWL reputation of From: address BAYES_00 -1.9 Bayes spam probability is 0 to 1% DMARC_MISSING 0.1 Missing DMARC policy KAM_DMARC_STATUS 0.01 Test Rule for DKIM or SPF Failure with Strict Alignment RCVD_IN_VALIDITY_CERTIFIED_BLOCKED 0.001 ADMINISTRATOR NOTICE: The query to Validity was blocked. See https://knowledge.validity.com/hc/en-us/articles/20961730681243 for more information. RCVD_IN_VALIDITY_RPBL_BLOCKED 0.001 ADMINISTRATOR NOTICE: The query to Validity was blocked. See https://knowledge.validity.com/hc/en-us/articles/20961730681243 for more information. RCVD_IN_VALIDITY_SAFE_BLOCKED 0.001 ADMINISTRATOR NOTICE: The query to Validity was blocked. See https://knowledge.validity.com/hc/en-us/articles/20961730681243 for more information. SPF_HELO_NONE 0.001 SPF: HELO does not publish an SPF Record SPF_PASS -0.001 SPF: sender matches SPF record Subject: [pve-devel] [PATCH docs v2 3/3] kernel samepage merging: describe how to disable for a specific VM X-BeenThere: pve-devel@lists.proxmox.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: Proxmox VE development discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Proxmox VE development discussion Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: pve-devel-bounces@lists.proxmox.com Sender: "pve-devel" Signed-off-by: Fiona Ebner --- kernel-samepage-merging.adoc | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) diff --git a/kernel-samepage-merging.adoc b/kernel-samepage-merging.adoc index 5f55403..e2e70d7 100644 --- a/kernel-samepage-merging.adoc +++ b/kernel-samepage-merging.adoc @@ -34,7 +34,11 @@ be a legal requirement. Disabling KSM ~~~~~~~~~~~~~ -To see if KSM is active, you can check the output of: +KSM can be disabled on a node or on a per-VM basis. + +.Disabe KSM on a Node + +To see if KSM is active on a node, you can check the output of: ---- # systemctl status ksmtuned @@ -52,3 +56,11 @@ Finally, to unmerge all the currently merged pages, run: # echo 2 > /sys/kernel/mm/ksm/run ---- +.Disabe KSM for a Specific VM + +The `allow-ksm` VM configuration option controls whether memory page merging is +allowed for a given VM. The option defaults to true and can be disabled with: + +---- +# qm set --allow-ksm 0 +---- -- 2.47.3 _______________________________________________ pve-devel mailing list pve-devel@lists.proxmox.com https://lists.proxmox.com/cgi-bin/mailman/listinfo/pve-devel