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The "sched_domain_shared" object is allocated for every topology level in __sdt_alloc() and is freed post sched domain rebuild if they aren't assigned during sd_init(). "sd->shared" is only assigned for SD_SHARE_LLC domains and out of all the assigned objects, only "sd_llc_shared" is ever used by the scheduler. Since only "sd_llc_shared" is ever used, and since SD_SHARE_LLC domains never overlap, allocate only a single range of per-CPU "sched_domain_shared" object with s_data instead of doing it per topology level. The subsequent commit uses the degeneration path to correctly assign the "sd->shared" to the topmost SD_SHARE_LLC domain. No functional changes are expected at this point. Signed-off-by: K Prateek Nayak <kprateek.nayak@amd.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Valentin Schneider <vschneid@redhat.com> Reviewed-by: Chen Yu <yu.c.chen@intel.com> Reviewed-by: Dietmar Eggemann <dietmar.eggemann@arm.com> Tested-by: Dietmar Eggemann <dietmar.eggemann@arm.com> Link: https://patch.msgid.link/20260312044434.1974-4-kprateek.nayak@amd.com