kernel/sched/ext.c:1334:38: sparse: sparse: incorrect type in initializer (different address spaces)

From: kernel test robot
Date: Fri Oct 04 2024 - 19:08:58 EST

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tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: ac308609567d31fe44be80ab757a5ddf062362ef
commit: 7b0888b7cc1924b74ce660e02f6211df8dd46e7b sched_ext: Implement core-sched support
date: 4 months ago
config: s390-randconfig-r132-20241004 (https://download.01.org/0day-ci/archive/20241005/202410050752.3Fxar6j4-lkp@xxxxxxxxx/config)
compiler: clang version 20.0.0git (https://github.com/llvm/llvm-project fef3566a25ff0e34fb87339ba5e13eca17cec00f)
reproduce: (https://download.01.org/0day-ci/archive/20241005/202410050752.3Fxar6j4-lkp@xxxxxxxxx/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202410050752.3Fxar6j4-lkp@xxxxxxxxx/

sparse warnings: (new ones prefixed by >>)
kernel/sched/build_policy.c: note: in included file:
kernel/sched/rt.c:916:70: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/rt.c:916:70: sparse: struct task_struct [noderef] __rcu *
kernel/sched/rt.c:916:70: sparse: struct task_struct *
kernel/sched/rt.c:2364:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/rt.c:2364:25: sparse: struct task_struct *
kernel/sched/rt.c:2364:25: sparse: struct task_struct [noderef] __rcu *
kernel/sched/rt.c:1002:38: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected struct task_struct *curr @@ got struct task_struct [noderef] __rcu *curr @@
kernel/sched/rt.c:1002:38: sparse: expected struct task_struct *curr
kernel/sched/rt.c:1002:38: sparse: got struct task_struct [noderef] __rcu *curr
kernel/sched/rt.c:1536:31: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected struct task_struct *p @@ got struct task_struct [noderef] __rcu *curr @@
kernel/sched/rt.c:1536:31: sparse: expected struct task_struct *p
kernel/sched/rt.c:1536:31: sparse: got struct task_struct [noderef] __rcu *curr
kernel/sched/rt.c:1876:9: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct sched_domain *[assigned] sd @@ got struct sched_domain [noderef] __rcu *parent @@
kernel/sched/rt.c:1876:9: sparse: expected struct sched_domain *[assigned] sd
kernel/sched/rt.c:1876:9: sparse: got struct sched_domain [noderef] __rcu *parent
kernel/sched/rt.c:1556:14: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct task_struct *curr @@ got struct task_struct [noderef] __rcu * @@
kernel/sched/rt.c:1556:14: sparse: expected struct task_struct *curr
kernel/sched/rt.c:1556:14: sparse: got struct task_struct [noderef] __rcu *
kernel/sched/rt.c:1621:45: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected struct task_struct *p @@ got struct task_struct [noderef] __rcu *curr @@
kernel/sched/rt.c:1621:45: sparse: expected struct task_struct *p
kernel/sched/rt.c:1621:45: sparse: got struct task_struct [noderef] __rcu *curr
kernel/sched/rt.c:1682:67: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct task_struct *tsk @@ got struct task_struct [noderef] __rcu *curr @@
kernel/sched/rt.c:1682:67: sparse: expected struct task_struct *tsk
kernel/sched/rt.c:1682:67: sparse: got struct task_struct [noderef] __rcu *curr
kernel/sched/rt.c:2044:40: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct task_struct *task @@ got struct task_struct [noderef] __rcu *curr @@
kernel/sched/rt.c:2044:40: sparse: expected struct task_struct *task
kernel/sched/rt.c:2044:40: sparse: got struct task_struct [noderef] __rcu *curr
kernel/sched/rt.c:2067:13: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/rt.c:2067:13: sparse: struct task_struct *
kernel/sched/rt.c:2067:13: sparse: struct task_struct [noderef] __rcu *
kernel/sched/rt.c:2417:54: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct task_struct *tsk @@ got struct task_struct [noderef] __rcu *curr @@
kernel/sched/rt.c:2417:54: sparse: expected struct task_struct *tsk
kernel/sched/rt.c:2417:54: sparse: got struct task_struct [noderef] __rcu *curr
kernel/sched/rt.c:2419:40: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct task_struct *p @@ got struct task_struct [noderef] __rcu *curr @@
kernel/sched/rt.c:2419:40: sparse: expected struct task_struct *p
kernel/sched/rt.c:2419:40: sparse: got struct task_struct [noderef] __rcu *curr
kernel/sched/rt.c:2419:61: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct task_struct *p @@ got struct task_struct [noderef] __rcu *curr @@
kernel/sched/rt.c:2419:61: sparse: expected struct task_struct *p
kernel/sched/rt.c:2419:61: sparse: got struct task_struct [noderef] __rcu *curr
kernel/sched/build_policy.c: note: in included file:
kernel/sched/deadline.c:2401:23: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct task_struct *p @@ got struct task_struct [noderef] __rcu *curr @@
kernel/sched/deadline.c:2401:23: sparse: expected struct task_struct *p
kernel/sched/deadline.c:2401:23: sparse: got struct task_struct [noderef] __rcu *curr
kernel/sched/deadline.c:2411:13: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/deadline.c:2411:13: sparse: struct task_struct *
kernel/sched/deadline.c:2411:13: sparse: struct task_struct [noderef] __rcu *
kernel/sched/deadline.c:2519:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/deadline.c:2519:25: sparse: struct task_struct *
kernel/sched/deadline.c:2519:25: sparse: struct task_struct [noderef] __rcu *
kernel/sched/deadline.c:2026:42: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected struct sched_dl_entity const *b @@ got struct sched_dl_entity [noderef] __rcu * @@
kernel/sched/deadline.c:2026:42: sparse: expected struct sched_dl_entity const *b
kernel/sched/deadline.c:2026:42: sparse: got struct sched_dl_entity [noderef] __rcu *
kernel/sched/deadline.c:2037:38: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct task_struct *tsk @@ got struct task_struct [noderef] __rcu *curr @@
kernel/sched/deadline.c:2037:38: sparse: expected struct task_struct *tsk
kernel/sched/deadline.c:2037:38: sparse: got struct task_struct [noderef] __rcu *curr
kernel/sched/deadline.c:1220:23: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct task_struct *p @@ got struct task_struct [noderef] __rcu *curr @@
kernel/sched/deadline.c:1220:23: sparse: expected struct task_struct *p
kernel/sched/deadline.c:1220:23: sparse: got struct task_struct [noderef] __rcu *curr
kernel/sched/deadline.c:1444:38: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected struct task_struct *curr @@ got struct task_struct [noderef] __rcu *curr @@
kernel/sched/deadline.c:1444:38: sparse: expected struct task_struct *curr
kernel/sched/deadline.c:1444:38: sparse: got struct task_struct [noderef] __rcu *curr
kernel/sched/deadline.c:2262:9: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct sched_domain *[assigned] sd @@ got struct sched_domain [noderef] __rcu *parent @@
kernel/sched/deadline.c:2262:9: sparse: expected struct sched_domain *[assigned] sd
kernel/sched/deadline.c:2262:9: sparse: got struct sched_domain [noderef] __rcu *parent
kernel/sched/deadline.c:1911:14: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct task_struct *curr @@ got struct task_struct [noderef] __rcu * @@
kernel/sched/deadline.c:1911:14: sparse: expected struct task_struct *curr
kernel/sched/deadline.c:1911:14: sparse: got struct task_struct [noderef] __rcu *
kernel/sched/deadline.c:1987:43: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected struct task_struct *p @@ got struct task_struct [noderef] __rcu *curr @@
kernel/sched/deadline.c:1987:43: sparse: expected struct task_struct *p
kernel/sched/deadline.c:1987:43: sparse: got struct task_struct [noderef] __rcu *curr
kernel/sched/deadline.c:2566:38: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct task_struct *tsk @@ got struct task_struct [noderef] __rcu *curr @@
kernel/sched/deadline.c:2566:38: sparse: expected struct task_struct *tsk
kernel/sched/deadline.c:2566:38: sparse: got struct task_struct [noderef] __rcu *curr
kernel/sched/deadline.c:2568:23: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct task_struct *p @@ got struct task_struct [noderef] __rcu *curr @@
kernel/sched/deadline.c:2568:23: sparse: expected struct task_struct *p
kernel/sched/deadline.c:2568:23: sparse: got struct task_struct [noderef] __rcu *curr
kernel/sched/deadline.c:2570:44: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected struct sched_dl_entity const *b @@ got struct sched_dl_entity [noderef] __rcu * @@
kernel/sched/deadline.c:2570:44: sparse: expected struct sched_dl_entity const *b
kernel/sched/deadline.c:2570:44: sparse: got struct sched_dl_entity [noderef] __rcu *
kernel/sched/deadline.c:2745:22: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/deadline.c:2745:22: sparse: struct task_struct [noderef] __rcu *
kernel/sched/deadline.c:2745:22: sparse: struct task_struct *
kernel/sched/deadline.c:2794:32: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct task_struct *p @@ got struct task_struct [noderef] __rcu *curr @@
kernel/sched/build_policy.c: note: in included file:
kernel/sched/ext.c:772:25: sparse: sparse: symbol 'scx_has_op' was not declared. Should it be static?
kernel/sched/ext.c:876:22: sparse: sparse: symbol 'scx_dump_data' was not declared. Should it be static?
>> kernel/sched/ext.c:1334:38: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected struct task_struct *curr @@ got struct task_struct [noderef] __rcu *curr @@
>> kernel/sched/ext.c:1406:56: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/ext.c:1406:56: sparse: struct task_struct *
kernel/sched/ext.c:1406:56: sparse: struct task_struct [noderef] __rcu *
>> kernel/sched/ext.c:1799:35: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected struct task_struct *p @@ got struct task_struct [noderef] __rcu *curr @@
kernel/sched/ext.c:1799:35: sparse: expected struct task_struct *p
kernel/sched/ext.c:1799:35: sparse: got struct task_struct [noderef] __rcu *curr
>> kernel/sched/ext.c:1809:38: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected struct task_struct *from @@ got struct task_struct [noderef] __rcu *curr @@
kernel/sched/ext.c:1809:38: sparse: expected struct task_struct *from
kernel/sched/ext.c:1809:38: sparse: got struct task_struct [noderef] __rcu *curr
>> kernel/sched/ext.c:2399:56: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected struct task_struct *sprev @@ got struct task_struct [noderef] __rcu *curr @@
kernel/sched/ext.c:2399:56: sparse: expected struct task_struct *sprev
kernel/sched/ext.c:2399:56: sparse: got struct task_struct [noderef] __rcu *curr
kernel/sched/ext.c:2625:38: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected struct task_struct *curr @@ got struct task_struct [noderef] __rcu *curr @@
kernel/sched/ext.c:2625:38: sparse: expected struct task_struct *curr
kernel/sched/ext.c:2625:38: sparse: got struct task_struct [noderef] __rcu *curr
>> kernel/sched/ext.c:4206:52: sparse: sparse: incorrect type in argument 3 (different address spaces) @@ expected struct task_struct *p @@ got struct task_struct [noderef] __rcu *curr @@
kernel/sched/ext.c:4206:52: sparse: expected struct task_struct *p
kernel/sched/ext.c:4206:52: sparse: got struct task_struct [noderef] __rcu *curr
>> kernel/sched/ext.c:4914:32: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct task_struct const *p @@ got struct task_struct [noderef] __rcu *curr @@
kernel/sched/ext.c:4914:32: sparse: expected struct task_struct const *p
kernel/sched/ext.c:4914:32: sparse: got struct task_struct [noderef] __rcu *curr
kernel/sched/ext.c:5905:33: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/ext.c:5905:33: sparse: struct task_struct [noderef] __rcu *
kernel/sched/ext.c:5905:33: sparse: struct task_struct const *
kernel/sched/build_policy.c: note: in included file:
kernel/sched/syscalls.c:206:22: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/syscalls.c:206:22: sparse: struct task_struct [noderef] __rcu *
kernel/sched/syscalls.c:206:22: sparse: struct task_struct *
kernel/sched/syscalls.c:253:48: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/syscalls.c:253:48: sparse: struct task_struct [noderef] __rcu *
kernel/sched/syscalls.c:253:48: sparse: struct task_struct *
kernel/sched/build_policy.c: note: in included file:
kernel/sched/sched.h:2234:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/sched.h:2234:25: sparse: struct task_struct [noderef] __rcu *
kernel/sched/sched.h:2234:25: sparse: struct task_struct *
kernel/sched/sched.h:2234:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/sched.h:2234:25: sparse: struct task_struct [noderef] __rcu *
kernel/sched/sched.h:2234:25: sparse: struct task_struct *
kernel/sched/sched.h:2234:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/sched.h:2234:25: sparse: struct task_struct [noderef] __rcu *
kernel/sched/sched.h:2234:25: sparse: struct task_struct *
kernel/sched/sched.h:2234:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/sched.h:2234:25: sparse: struct task_struct [noderef] __rcu *
kernel/sched/sched.h:2234:25: sparse: struct task_struct *
kernel/sched/sched.h:2234:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/sched.h:2234:25: sparse: struct task_struct [noderef] __rcu *
kernel/sched/sched.h:2234:25: sparse: struct task_struct *
kernel/sched/sched.h:2234:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/sched.h:2234:25: sparse: struct task_struct [noderef] __rcu *
kernel/sched/sched.h:2234:25: sparse: struct task_struct *
kernel/sched/sched.h:2234:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/sched.h:2234:25: sparse: struct task_struct [noderef] __rcu *
kernel/sched/sched.h:2234:25: sparse: struct task_struct *
kernel/sched/sched.h:2234:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/sched.h:2234:25: sparse: struct task_struct [noderef] __rcu *
kernel/sched/sched.h:2234:25: sparse: struct task_struct *
kernel/sched/sched.h:2234:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/sched.h:2234:25: sparse: struct task_struct [noderef] __rcu *
kernel/sched/sched.h:2234:25: sparse: struct task_struct *
kernel/sched/sched.h:2234:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/sched.h:2234:25: sparse: struct task_struct [noderef] __rcu *
kernel/sched/sched.h:2234:25: sparse: struct task_struct *
kernel/sched/sched.h:2409:9: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/sched.h:2409:9: sparse: struct task_struct [noderef] __rcu *
kernel/sched/sched.h:2409:9: sparse: struct task_struct *
kernel/sched/sched.h:2234:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/sched.h:2234:25: sparse: struct task_struct [noderef] __rcu *
kernel/sched/sched.h:2234:25: sparse: struct task_struct *
kernel/sched/sched.h:2409:9: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/sched.h:2409:9: sparse: struct task_struct [noderef] __rcu *
kernel/sched/sched.h:2409:9: sparse: struct task_struct *
kernel/sched/build_policy.c: note: in included file:
kernel/sched/syscalls.c:1426:6: sparse: sparse: context imbalance in 'sched_getaffinity' - different lock contexts for basic block
kernel/sched/build_policy.c: note: in included file:
kernel/sched/rt.c:1707:15: sparse: sparse: dereference of noderef expression

vim +1334 kernel/sched/ext.c

7b0888b7cc1924 Tejun Heo 2024-06-18 1331
f0e1a0643a59bf Tejun Heo 2024-06-18 1332 static void update_curr_scx(struct rq *rq)
f0e1a0643a59bf Tejun Heo 2024-06-18 1333 {
f0e1a0643a59bf Tejun Heo 2024-06-18 @1334 struct task_struct *curr = rq->curr;
f0e1a0643a59bf Tejun Heo 2024-06-18 1335 u64 now = rq_clock_task(rq);
f0e1a0643a59bf Tejun Heo 2024-06-18 1336 u64 delta_exec;
f0e1a0643a59bf Tejun Heo 2024-06-18 1337
f0e1a0643a59bf Tejun Heo 2024-06-18 1338 if (time_before_eq64(now, curr->se.exec_start))
f0e1a0643a59bf Tejun Heo 2024-06-18 1339 return;
f0e1a0643a59bf Tejun Heo 2024-06-18 1340
f0e1a0643a59bf Tejun Heo 2024-06-18 1341 delta_exec = now - curr->se.exec_start;
f0e1a0643a59bf Tejun Heo 2024-06-18 1342 curr->se.exec_start = now;
f0e1a0643a59bf Tejun Heo 2024-06-18 1343 curr->se.sum_exec_runtime += delta_exec;
f0e1a0643a59bf Tejun Heo 2024-06-18 1344 account_group_exec_runtime(curr, delta_exec);
f0e1a0643a59bf Tejun Heo 2024-06-18 1345 cgroup_account_cputime(curr, delta_exec);
f0e1a0643a59bf Tejun Heo 2024-06-18 1346
7b0888b7cc1924 Tejun Heo 2024-06-18 1347 if (curr->scx.slice != SCX_SLICE_INF) {
f0e1a0643a59bf Tejun Heo 2024-06-18 1348 curr->scx.slice -= min(curr->scx.slice, delta_exec);
7b0888b7cc1924 Tejun Heo 2024-06-18 1349 if (!curr->scx.slice)
7b0888b7cc1924 Tejun Heo 2024-06-18 1350 touch_core_sched(rq, curr);
7b0888b7cc1924 Tejun Heo 2024-06-18 1351 }
f0e1a0643a59bf Tejun Heo 2024-06-18 1352 }
f0e1a0643a59bf Tejun Heo 2024-06-18 1353
f0e1a0643a59bf Tejun Heo 2024-06-18 1354 static void dsq_mod_nr(struct scx_dispatch_q *dsq, s32 delta)
f0e1a0643a59bf Tejun Heo 2024-06-18 1355 {
f0e1a0643a59bf Tejun Heo 2024-06-18 1356 /* scx_bpf_dsq_nr_queued() reads ->nr without locking, use WRITE_ONCE() */
f0e1a0643a59bf Tejun Heo 2024-06-18 1357 WRITE_ONCE(dsq->nr, dsq->nr + delta);
f0e1a0643a59bf Tejun Heo 2024-06-18 1358 }
f0e1a0643a59bf Tejun Heo 2024-06-18 1359
f0e1a0643a59bf Tejun Heo 2024-06-18 1360 static void dispatch_enqueue(struct scx_dispatch_q *dsq, struct task_struct *p,
f0e1a0643a59bf Tejun Heo 2024-06-18 1361 u64 enq_flags)
f0e1a0643a59bf Tejun Heo 2024-06-18 1362 {
f0e1a0643a59bf Tejun Heo 2024-06-18 1363 bool is_local = dsq->id == SCX_DSQ_LOCAL;
f0e1a0643a59bf Tejun Heo 2024-06-18 1364
f0e1a0643a59bf Tejun Heo 2024-06-18 1365 WARN_ON_ONCE(p->scx.dsq || !list_empty(&p->scx.dsq_node));
f0e1a0643a59bf Tejun Heo 2024-06-18 1366
f0e1a0643a59bf Tejun Heo 2024-06-18 1367 if (!is_local) {
f0e1a0643a59bf Tejun Heo 2024-06-18 1368 raw_spin_lock(&dsq->lock);
f0e1a0643a59bf Tejun Heo 2024-06-18 1369 if (unlikely(dsq->id == SCX_DSQ_INVALID)) {
f0e1a0643a59bf Tejun Heo 2024-06-18 1370 scx_ops_error("attempting to dispatch to a destroyed dsq");
f0e1a0643a59bf Tejun Heo 2024-06-18 1371 /* fall back to the global dsq */
f0e1a0643a59bf Tejun Heo 2024-06-18 1372 raw_spin_unlock(&dsq->lock);
f0e1a0643a59bf Tejun Heo 2024-06-18 1373 dsq = &scx_dsq_global;
f0e1a0643a59bf Tejun Heo 2024-06-18 1374 raw_spin_lock(&dsq->lock);
f0e1a0643a59bf Tejun Heo 2024-06-18 1375 }
f0e1a0643a59bf Tejun Heo 2024-06-18 1376 }
f0e1a0643a59bf Tejun Heo 2024-06-18 1377
81aae789181b58 Tejun Heo 2024-06-18 1378 if (enq_flags & (SCX_ENQ_HEAD | SCX_ENQ_PREEMPT))
f0e1a0643a59bf Tejun Heo 2024-06-18 1379 list_add(&p->scx.dsq_node, &dsq->list);
f0e1a0643a59bf Tejun Heo 2024-06-18 1380 else
f0e1a0643a59bf Tejun Heo 2024-06-18 1381 list_add_tail(&p->scx.dsq_node, &dsq->list);
f0e1a0643a59bf Tejun Heo 2024-06-18 1382
f0e1a0643a59bf Tejun Heo 2024-06-18 1383 dsq_mod_nr(dsq, 1);
f0e1a0643a59bf Tejun Heo 2024-06-18 1384 p->scx.dsq = dsq;
f0e1a0643a59bf Tejun Heo 2024-06-18 1385
f0e1a0643a59bf Tejun Heo 2024-06-18 1386 /*
f0e1a0643a59bf Tejun Heo 2024-06-18 1387 * scx.ddsp_dsq_id and scx.ddsp_enq_flags are only relevant on the
f0e1a0643a59bf Tejun Heo 2024-06-18 1388 * direct dispatch path, but we clear them here because the direct
f0e1a0643a59bf Tejun Heo 2024-06-18 1389 * dispatch verdict may be overridden on the enqueue path during e.g.
f0e1a0643a59bf Tejun Heo 2024-06-18 1390 * bypass.
f0e1a0643a59bf Tejun Heo 2024-06-18 1391 */
f0e1a0643a59bf Tejun Heo 2024-06-18 1392 p->scx.ddsp_dsq_id = SCX_DSQ_INVALID;
f0e1a0643a59bf Tejun Heo 2024-06-18 1393 p->scx.ddsp_enq_flags = 0;
f0e1a0643a59bf Tejun Heo 2024-06-18 1394
f0e1a0643a59bf Tejun Heo 2024-06-18 1395 /*
f0e1a0643a59bf Tejun Heo 2024-06-18 1396 * We're transitioning out of QUEUEING or DISPATCHING. store_release to
f0e1a0643a59bf Tejun Heo 2024-06-18 1397 * match waiters' load_acquire.
f0e1a0643a59bf Tejun Heo 2024-06-18 1398 */
f0e1a0643a59bf Tejun Heo 2024-06-18 1399 if (enq_flags & SCX_ENQ_CLEAR_OPSS)
f0e1a0643a59bf Tejun Heo 2024-06-18 1400 atomic_long_set_release(&p->scx.ops_state, SCX_OPSS_NONE);
f0e1a0643a59bf Tejun Heo 2024-06-18 1401
f0e1a0643a59bf Tejun Heo 2024-06-18 1402 if (is_local) {
f0e1a0643a59bf Tejun Heo 2024-06-18 1403 struct rq *rq = container_of(dsq, struct rq, scx.local_dsq);
81aae789181b58 Tejun Heo 2024-06-18 1404 bool preempt = false;
81aae789181b58 Tejun Heo 2024-06-18 1405
81aae789181b58 Tejun Heo 2024-06-18 @1406 if ((enq_flags & SCX_ENQ_PREEMPT) && p != rq->curr &&
81aae789181b58 Tejun Heo 2024-06-18 1407 rq->curr->sched_class == &ext_sched_class) {
81aae789181b58 Tejun Heo 2024-06-18 1408 rq->curr->scx.slice = 0;
81aae789181b58 Tejun Heo 2024-06-18 1409 preempt = true;
81aae789181b58 Tejun Heo 2024-06-18 1410 }
f0e1a0643a59bf Tejun Heo 2024-06-18 1411
81aae789181b58 Tejun Heo 2024-06-18 1412 if (preempt || sched_class_above(&ext_sched_class,
81aae789181b58 Tejun Heo 2024-06-18 1413 rq->curr->sched_class))
f0e1a0643a59bf Tejun Heo 2024-06-18 1414 resched_curr(rq);
f0e1a0643a59bf Tejun Heo 2024-06-18 1415 } else {
f0e1a0643a59bf Tejun Heo 2024-06-18 1416 raw_spin_unlock(&dsq->lock);
f0e1a0643a59bf Tejun Heo 2024-06-18 1417 }
f0e1a0643a59bf Tejun Heo 2024-06-18 1418 }
f0e1a0643a59bf Tejun Heo 2024-06-18 1419

:::::: The code at line 1334 was first introduced by commit
:::::: f0e1a0643a59bf1f922fa209cec86a170b784f3f sched_ext: Implement BPF extensible scheduler class

:::::: TO: Tejun Heo <tj@xxxxxxxxxx>
:::::: CC: Tejun Heo <tj@xxxxxxxxxx>

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