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([2001:b07:6468:f312:c8dd:75d4:99ab:290a]) by smtp.gmail.com with ESMTPSA id q27sm2879609ejc.74.2021.02.25.04.15.54 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 25 Feb 2021 04:15:54 -0800 (PST) Subject: Re: [PATCH] multiprocess: move feature to meson_options.txt To: =?UTF-8?Q?Philippe_Mathieu-Daud=c3=a9?= , qemu-devel@nongnu.org, Stefan Hajnoczi References: <20210224122306.451764-1-pbonzini@redhat.com> <72fc7d76-f8e3-2c0f-e890-99509bb6230d@redhat.com> From: Paolo Bonzini Message-ID: Date: Thu, 25 Feb 2021 13:15:53 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.7.0 MIME-Version: 1.0 In-Reply-To: <72fc7d76-f8e3-2c0f-e890-99509bb6230d@redhat.com> Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=pbonzini@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=216.205.24.124; envelope-from=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -31 X-Spam_score: -3.2 X-Spam_bar: --- X-Spam_report: (-3.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, NICE_REPLY_A=-0.435, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Elena Ufimtseva , John G Johnson , Thomas Huth , Jagannathan Raman , Markus Armbruster Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 25/02/21 11:38, Philippe Mathieu-Daudé wrote: > On 2/24/21 1:23 PM, Paolo Bonzini wrote: >> Signed-off-by: Paolo Bonzini >> --- >> configure | 12 ++++-------- >> meson.build | 9 +++++++-- >> meson_options.txt | 2 ++ >> 3 files changed, 13 insertions(+), 10 deletions(-) > ... > >> @@ -2535,6 +2540,7 @@ endif >> summary_info += {'target list': ' '.join(target_dirs)} >> if have_system >> summary_info += {'default devices': get_option('default_devices')} >> + summary_info += {'Multiprocess QEMU': multiprocess_allowed} > > Since you are changing this, it is a good opportunity to find a > better description to this feature (similarly how we recently clarified > the TCI description). > > The current description is confusing with multiprocessing (which is > by default on QEMU and every developer want to exploit that). > > So the main multiprocess code resides in hw/remote/mpqemu*. > > I have the impression "monolithic application" is common in > software engineering. What about "polylithic QEMU"? > > Stefan once described it as "out of (main) process device emulation". Out of process emulation? Paolo > Relevant links: > https://english.stackexchange.com/questions/112633/whats-an-antonym-of-monolithic-as-in-monolithic-architecture/119212#119212 > https://infovis-wiki.net/wiki/Polylithic_design > > ... >> if not supported_cpus.contains(cpu) >> diff --git a/meson_options.txt b/meson_options.txt >> index 675a9c500a..bf11de7bb2 100644 >> --- a/meson_options.txt >> +++ b/meson_options.txt >> @@ -45,6 +45,8 @@ option('cfi', type: 'boolean', value: 'false', >> description: 'Control-Flow Integrity (CFI)') >> option('cfi_debug', type: 'boolean', value: 'false', >> description: 'Verbose errors in case of CFI violation') >> +option('multiprocess', type: 'feature', value: 'auto', >> + description: 'Multiprocess QEMU support') >