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[216.160.65.90]) by smtp.gmail.com with ESMTPSA id q20sm7999810pfn.111.2020.07.17.11.05.54 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 17 Jul 2020 11:05:55 -0700 (PDT) Subject: Re: [PATCH v1 4/5] util: add qemu_get_host_physmem utility function To: =?UTF-8?Q?Alex_Benn=c3=a9e?= , qemu-devel@nongnu.org References: <20200717105139.25293-1-alex.bennee@linaro.org> <20200717105139.25293-5-alex.bennee@linaro.org> From: Richard Henderson Message-ID: Date: Fri, 17 Jul 2020 11:05:53 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <20200717105139.25293-5-alex.bennee@linaro.org> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2607:f8b0:4864:20::642; envelope-from=richard.henderson@linaro.org; helo=mail-pl1-x642.google.com X-detected-operating-system: by eggs.gnu.org: No matching host in p0f cache. That's all we know. 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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: fam@euphon.net, berrange@redhat.com, Stefan Weil , f4bug@amsat.org, Christian Ehrhardt , cota@braap.org, Paolo Bonzini , aurelien@aurel32.net Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 7/17/20 3:51 AM, Alex Bennée wrote: > +size_t qemu_get_host_physmem(void) > +{ > +#ifdef _SC_PHYS_PAGES > + long pages = sysconf(_SC_PHYS_PAGES); > + if (pages > 0) { > + return pages * qemu_real_host_page_size; > + } > +#endif > + return 0; > +} Is it worth examining our own RLIMIT_{AS,DATA} as well? I suppose that's not usually what is tweaked in the example of a ram-limited container... r~