From nobody Wed Jul 21 08:53:40 2021 X-Original-To: freebsd-stable@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 033C411E3D83 for ; Wed, 21 Jul 2021 08:53:52 +0000 (UTC) (envelope-from SRS0=OSCD=MN=quip.cz=000.fbsd@elsa.codelab.cz) Received: from elsa.codelab.cz (elsa.codelab.cz [94.124.105.4]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 4GV8Wg03Ynz4hm0; Wed, 21 Jul 2021 08:53:50 +0000 (UTC) (envelope-from SRS0=OSCD=MN=quip.cz=000.fbsd@elsa.codelab.cz) Received: from elsa.codelab.cz (localhost [127.0.0.1]) by elsa.codelab.cz (Postfix) with ESMTP id 7054D2842B; Wed, 21 Jul 2021 10:53:43 +0200 (CEST) Received: from illbsd.quip.test (ip-94-113-69-69.net.upcbroadband.cz [94.113.69.69]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by elsa.codelab.cz (Postfix) with ESMTPSA id B54F828416; Wed, 21 Jul 2021 10:53:41 +0200 (CEST) Subject: Re: CPU hot-plug and RAM hot-add in virtual machines To: Andriy Gapon , FreeBSD Stable Mailing List References: <4336a1bf-d826-dba3-9ec1-9b48cf7cd177@quip.cz> <70033628-bc3a-24d2-4c65-9a3b9c1c66d5@FreeBSD.org> From: Miroslav Lachman <000.fbsd@quip.cz> Message-ID: Date: Wed, 21 Jul 2021 10:53:40 +0200 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 List-Id: Production branch of FreeBSD source code List-Archive: https://lists.freebsd.org/archives/freebsd-stable List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-stable@freebsd.org X-BeenThere: freebsd-stable@freebsd.org MIME-Version: 1.0 In-Reply-To: <70033628-bc3a-24d2-4c65-9a3b9c1c66d5@FreeBSD.org> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 4GV8Wg03Ynz4hm0 X-Spamd-Bar: - Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=none; spf=none (mx1.freebsd.org: domain of SRS0=OSCD=MN=quip.cz=000.fbsd@elsa.codelab.cz has no SPF policy when checking 94.124.105.4) smtp.mailfrom=SRS0=OSCD=MN=quip.cz=000.fbsd@elsa.codelab.cz X-Spamd-Result: default: False [-1.80 / 15.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; ARC_NA(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; FROM_HAS_DN(0.00)[]; RBL_DBL_DONT_QUERY_IPS(0.00)[94.124.105.4:from]; TO_MATCH_ENVRCPT_ALL(0.00)[]; NEURAL_HAM_LONG(-1.00)[-0.997]; MIME_GOOD(-0.10)[text/plain]; DMARC_NA(0.00)[quip.cz]; AUTH_NA(1.00)[]; SPAMHAUS_ZRD(0.00)[94.124.105.4:from:127.0.2.255]; RCVD_COUNT_THREE(0.00)[3]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; TO_DN_ALL(0.00)[]; NEURAL_HAM_SHORT(-1.00)[-1.000]; RCPT_COUNT_TWO(0.00)[2]; R_SPF_NA(0.00)[no SPF record]; FORGED_SENDER(0.30)[000.fbsd@quip.cz,SRS0=OSCD=MN=quip.cz=000.fbsd@elsa.codelab.cz]; RECEIVED_SPAMHAUS_PBL(0.00)[94.113.69.69:received]; RCVD_TLS_LAST(0.00)[]; R_DKIM_NA(0.00)[]; ASN(0.00)[asn:42000, ipnet:94.124.104.0/21, country:CZ]; MIME_TRACE(0.00)[0:+]; FROM_NEQ_ENVFROM(0.00)[000.fbsd@quip.cz,SRS0=OSCD=MN=quip.cz=000.fbsd@elsa.codelab.cz]; MAILMAN_DEST(0.00)[freebsd-stable] X-ThisMailContainsUnwantedMimeParts: N On 09/07/2021 13:16, Andriy Gapon wrote: > On 08/07/2021 00:34, Miroslav Lachman wrote: >> The question is simple but I cannot find answer - Does FreeBSD support >> hot-plug vCPU and hot-add RAM? >> Current virtualization platforms support adding CPU cores or >> additional RAM without the need to reboot the guest OS. Some of our >> clients need to add additional vCPUs or RAM so often that hot-plug and >> hot-add will be really useful. If this is not supported on FreeBSD for >> now, is there any Work In Progress? Or is there a plan to support it? > > I think that those features are not supported and I haven't heard of any > WIP. Thank you for your reply. I know nothing about system internals. Is it too much work to implement it or just nobody from developers need it thus nobody write the code? Virtualization is more and more popular these days so I think it will be useful for many users. Kind regards Miroslav Lachman