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Tue, 1 Sep 2026 19:26:18 +0000 Message-ID: Date: Tue, 1 Sep 2026 12:26:16 -0700 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 1/2] x86/resctrl, Documentation: Keep mbm_assign_mode "default" on boot To: Babu Moger , "Moger, Babu" , "Borislav Petkov" CC: "Luck, Tony" , "x86@kernel.org" , "Dave.Martin@arm.com" , "james.morse@arm.com" , "corbet@lwn.net" , "skhan@linuxfoundation.org" , "tglx@kernel.org" , "mingo@redhat.com" , "dave.hansen@linux.intel.com" , "hpa@zytor.com" , "linux-kernel@vger.kernel.org" , "linux-doc@vger.kernel.org" , "Eranian, Stephane" , "peternewman@google.com" References: <7d3dd384-9101-49cb-ada4-b8320198233e@amd.com> <20260730194328.GEamupYLsURg6VvxBU@fat_crate.local> <20260731003436.GKamvtnJlKydaEqstA@fat_crate.local> <4bfafa1e-a7da-4c37-8da9-9fbba14106fd@intel.com> <20260801012227.GEam1KUyMz601QOzrT@fat_crate.local> <5f10ceab-5569-409b-8e78-c4a4f232489f@intel.com> <20260804191608.GDanI6eK2Q07w6pNcb@fat_crate.local> <98be93cc-f2d8-4bad-bbb0-f309e912054c@intel.com> <20260804224703.GFanJr52UbKBrCOTij@fat_crate.local> <112cebea-d455-4b75-847b-bb7d4aa4847d@intel.com> <1fe5cb09-aa2e-4b3d-9fbd-293d8e9f33d7@amd.com> Content-Language: en-US From: Reinette Chatre In-Reply-To: Content-Type: text/plain; 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I'd like to revisit the > conversation and understand the plan moving forward. > > Please advice. More below. >From my side I provide a very high level summary of my view below as we await guidance per [1]: If this is the right thing to do then there should be no reason for the motivation to omit the consequences, known limitations, and non-covered scenarios. These should be highlighted upfront and weighed to justify why this direction makes sense. Beyond that, framing pqos as a first-class userspace solution in this motivation is misleading, as pqos currently cannot fully accommodate the mode requested to be made default by this patch. Reinette [1] https://lore.kernel.org/lkml/20260728170423.GAamjhF3W74TW4q9DG@fat_crate.local/