lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Message-ID: <a64525db-7339-48dd-922f-79348183b5d9@intel.com> Date: Fri, 6 Sep 2024 10:16:13 +1200 From: "Huang, Kai" <kai.huang@...el.com> To: Aaron Lu <aaron.lu@...el.com>, Jarkko Sakkinen <jarkko@...nel.org>, "Dave Hansen" <dave.hansen@...ux.intel.com> CC: "Molina Sabido, Gerardo" <gerardo.molina.sabido@...el.com>, Zhimin Luo <zhimin.luo@...el.com>, <linux-sgx@...r.kernel.org>, <linux-kernel@...r.kernel.org>, <x86@...nel.org> Subject: Re: [PATCH v2 2/2] x86/sgx: Log information when a node lacks an EPC section On 5/09/2024 8:08 pm, Aaron Lu wrote: > For optimized performance, firmware typically distributes EPC sections > evenly across different NUMA nodes. However, there are scenarios where > a node may have both CPUs and memory but no EPC section configured. For > example, in an 8-socket system with a Sub-Numa-Cluster=2 setup, there > are a total of 16 nodes. Given that the maximum number of supported EPC > sections is 8, it is simply not feasible to assign one EPC section to > each node. This configuration is not incorrect - SGX will still operate > correctly; it is just not optimized from a NUMA standpoint. > > For this reason, log a message when a node with both CPUs and memory > lacks an EPC section. This will provide users with a hint as to why they > might be experiencing less-than-ideal performance when running SGX > enclaves. > > Suggested-by: Dave Hansen <dave.hansen@...el.com> > Signed-off-by: Aaron Lu <aaron.lu@...el.com> Acked-by: Kai Huang <kai.huang@...el.com>
Powered by blists - more mailing lists