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[88.187.86.199]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-39eae963f62sm2213118f8f.5.2025.04.11.08.05.20 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 11 Apr 2025 08:05:20 -0700 (PDT) Message-ID: Date: Fri, 11 Apr 2025 17:05:20 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PULL 8/9] meson: Disallow 64-bit on 32-bit emulation To: =?UTF-8?Q?Daniel_P=2E_Berrang=C3=A9?= , Richard Henderson Cc: qemu-devel@nongnu.org, Thomas Huth , Stefan Hajnoczi References: <20250208205725.568631-1-richard.henderson@linaro.org> <20250208205725.568631-9-richard.henderson@linaro.org> Content-Language: en-US From: =?UTF-8?Q?Philippe_Mathieu-Daud=C3=A9?= In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2a00:1450:4864:20::42d; envelope-from=philmd@linaro.org; helo=mail-wr1-x42d.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, 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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On 11/4/25 15:42, Daniel P. Berrangé wrote: > On Sat, Feb 08, 2025 at 12:57:23PM -0800, Richard Henderson wrote: >> For system mode, we can rarely support the amount of RAM that >> the guest requires. TCG emulation is restricted to round-robin >> mode, which solves many of the atomicity issues, but not those >> associated with virtio. In any case, round-robin does nothing >> to help the speed of emulation. >> >> For user mode, most emulation does not succeed at all. Most >> of the time we cannot even load 64-bit non-PIE binaries due >> to lack of a 64-bit address space. Threads are run in >> parallel, not round-robin, which means that atomicity >> is not handled. >> >> Reviewed-by: Thomas Huth >> Reviewed-by: Philippe Mathieu-Daudé >> Signed-off-by: Richard Henderson >> --- >> meson.build | 13 ++++++++++--- >> 1 file changed, 10 insertions(+), 3 deletions(-) > > Shouldn't this patch and the earlier ones in this series have > added something to removed-features.rst, as this is a significant > feature removal which is impacting downstream users, and distros > in particular. IIRC the rationale for not deprecating was the feature is largely broken already. Skipping the deprecation process we indeed forgot to document in removed-features.rst. Do you expect the doc update for the 10.0 release?