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7030513a08
Cache aware scheduling needs to know the LLC size that a process can use, so as to avoid memory-intensive tasks from being over-aggregated on a single LLC. Introduce a preparation patch to add get_effective_llc_bytes() to get the LLC size that a CPU can use. The function can be further enhanced by subtracting the LLC cache ways reserved by resctrl (CAT in Intel RDT, etc). Suggested-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Chen Yu <yu.c.chen@intel.com> Co-developed-by: Tim Chen <tim.c.chen@linux.intel.com> Signed-off-by: Tim Chen <tim.c.chen@linux.intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Tested-by: Tingyin Duan <tingyin.duan@gmail.com> Link: https://patch.msgid.link/37afee09ff608034da0ce149e72d33b6f4698edf.1778703694.git.tim.c.chen@linux.intel.com