函数源码 |
Source File:arch\x86\kernel\cpu\resctrl\rdtgroup.c |
Create Date:2022-07-27 09:10:55 |
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332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 | static int cpus_mon_write(struct rdtgroup *rdtgrp, cpumask_var_t newmask, cpumask_var_t tmpmask){ struct rdtgroup *prgrp = rdtgrp->mon.parent, *crgrp; struct list_head *head; /* Check whether cpus belong to parent ctrl group */ cpumask_andnot(tmpmask, newmask, &prgrp->cpu_mask); if (cpumask_weight(tmpmask)) { rdt_last_cmd_puts("Can only add CPUs to mongroup that belong to parent\n"); return -EINVAL; } /* Check whether cpus are dropped from this group */ cpumask_andnot(tmpmask, &rdtgrp->cpu_mask, newmask); if (cpumask_weight(tmpmask)) { /* Give any dropped cpus to parent rdtgroup */ cpumask_or(&prgrp->cpu_mask, &prgrp->cpu_mask, tmpmask); update_closid_rmid(tmpmask, prgrp); } /* * If we added cpus, remove them from previous group that owned them * and update per-cpu rmid */ cpumask_andnot(tmpmask, newmask, &rdtgrp->cpu_mask); if (cpumask_weight(tmpmask)) { head = &prgrp->mon.crdtgrp_list; list_for_each_entry(crgrp, head, mon.crdtgrp_list) { if (crgrp == rdtgrp) continue; cpumask_andnot(&crgrp->cpu_mask, &crgrp->cpu_mask, tmpmask); } update_closid_rmid(tmpmask, rdtgrp); } /* Done pushing/pulling - update this group with new mask */ cpumask_copy(&rdtgrp->cpu_mask, newmask); return 0;} |