Re: [PATCH] sched/fair: remove unneeded header files

From: kernel test robot
Date: Sat May 27 2023 - 20:57:21 EST

Hi Miaohe,

kernel test robot noticed the following build errors:

[auto build test ERROR on tip/sched/core]
[also build test ERROR on linus/master v6.4-rc3 next-20230525]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url: https://github.com/intel-lab-lkp/linux/commits/Miaohe-Lin/sched-fair-remove-unneeded-header-files/20230527-174628
base: tip/sched/core
patch link: https://lore.kernel.org/r/20230527173727.1669047-1-linmiaohe%40huawei.com
patch subject: [PATCH] sched/fair: remove unneeded header files
config: x86_64-randconfig-a012-20230528 (https://download.01.org/0day-ci/archive/20230528/202305280847.ss7JHZEe-lkp@xxxxxxxxx/config)
compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project f28c006a5895fc0e329fe15fead81e37457cb1d1)
reproduce (this is a W=1 build):
mkdir -p ~/bin
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://github.com/intel-lab-lkp/linux/commit/653731fdd11d1ecb757fe4b90484ef4a777fb584
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Miaohe-Lin/sched-fair-remove-unneeded-header-files/20230527-174628
git checkout 653731fdd11d1ecb757fe4b90484ef4a777fb584
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang ~/bin/make.cross W=1 O=build_dir ARCH=x86_64 olddefconfig
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang ~/bin/make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash kernel/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202305280847.ss7JHZEe-lkp@xxxxxxxxx/

All errors (new ones prefixed by >>):

>> kernel/sched/fair.c:1585:7: error: implicit declaration of function 'node_is_toptier' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
!node_is_toptier(src_nid)) {
^
kernel/sched/fair.c:2844:7: error: implicit declaration of function 'node_is_toptier' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
if (!node_is_toptier(mem_node) &&
^
>> kernel/sched/fair.c:3014:8: error: implicit declaration of function 'vma_migratable' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
if (!vma_migratable(vma) || !vma_policy_mof(vma) ||
^
>> kernel/sched/fair.c:3014:32: error: implicit declaration of function 'vma_policy_mof' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
if (!vma_migratable(vma) || !vma_policy_mof(vma) ||
^
>> kernel/sched/fair.c:3015:4: error: implicit declaration of function 'is_vm_hugetlb_page' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
is_vm_hugetlb_page(vma) || (vma->vm_flags & VM_MIXEDMAP)) {
^
kernel/sched/fair.c:6159:6: warning: no previous prototype for function 'init_cfs_bandwidth' [-Wmissing-prototypes]
void init_cfs_bandwidth(struct cfs_bandwidth *cfs_b) {}
^
kernel/sched/fair.c:6159:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void init_cfs_bandwidth(struct cfs_bandwidth *cfs_b) {}
^
static
kernel/sched/fair.c:11973:6: warning: no previous prototype for function 'task_vruntime_update' [-Wmissing-prototypes]
void task_vruntime_update(struct rq *rq, struct task_struct *p, bool in_fi)
^
kernel/sched/fair.c:11973:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void task_vruntime_update(struct rq *rq, struct task_struct *p, bool in_fi)
^
static
kernel/sched/fair.c:12595:6: warning: no previous prototype for function 'free_fair_sched_group' [-Wmissing-prototypes]
void free_fair_sched_group(struct task_group *tg) { }
^
kernel/sched/fair.c:12595:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void free_fair_sched_group(struct task_group *tg) { }
^
static
kernel/sched/fair.c:12597:5: warning: no previous prototype for function 'alloc_fair_sched_group' [-Wmissing-prototypes]
int alloc_fair_sched_group(struct task_group *tg, struct task_group *parent)
^
kernel/sched/fair.c:12597:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
int alloc_fair_sched_group(struct task_group *tg, struct task_group *parent)
^
static
kernel/sched/fair.c:12602:6: warning: no previous prototype for function 'online_fair_sched_group' [-Wmissing-prototypes]
void online_fair_sched_group(struct task_group *tg) { }
^
kernel/sched/fair.c:12602:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void online_fair_sched_group(struct task_group *tg) { }
^
static
kernel/sched/fair.c:12604:6: warning: no previous prototype for function 'unregister_fair_sched_group' [-Wmissing-prototypes]
void unregister_fair_sched_group(struct task_group *tg) { }
^
kernel/sched/fair.c:12604:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void unregister_fair_sched_group(struct task_group *tg) { }
^
static
6 warnings and 5 errors generated.


vim +/node_is_toptier +1585 kernel/sched/fair.c

c959924b0dc53b Huang Ying 2022-07-13 1572
10f39042711ba2 Rik van Riel 2014-01-27 1573 bool should_numa_migrate_memory(struct task_struct *p, struct page * page,
10f39042711ba2 Rik van Riel 2014-01-27 1574 int src_nid, int dst_cpu)
10f39042711ba2 Rik van Riel 2014-01-27 1575 {
cb361d8cdef699 Jann Horn 2019-07-16 1576 struct numa_group *ng = deref_curr_numa_group(p);
10f39042711ba2 Rik van Riel 2014-01-27 1577 int dst_nid = cpu_to_node(dst_cpu);
10f39042711ba2 Rik van Riel 2014-01-27 1578 int last_cpupid, this_cpupid;
10f39042711ba2 Rik van Riel 2014-01-27 1579
33024536bafd91 Huang Ying 2022-07-13 1580 /*
33024536bafd91 Huang Ying 2022-07-13 1581 * The pages in slow memory node should be migrated according
33024536bafd91 Huang Ying 2022-07-13 1582 * to hot/cold instead of private/shared.
33024536bafd91 Huang Ying 2022-07-13 1583 */
33024536bafd91 Huang Ying 2022-07-13 1584 if (sysctl_numa_balancing_mode & NUMA_BALANCING_MEMORY_TIERING &&
33024536bafd91 Huang Ying 2022-07-13 @1585 !node_is_toptier(src_nid)) {
33024536bafd91 Huang Ying 2022-07-13 1586 struct pglist_data *pgdat;
c959924b0dc53b Huang Ying 2022-07-13 1587 unsigned long rate_limit;
c959924b0dc53b Huang Ying 2022-07-13 1588 unsigned int latency, th, def_th;
33024536bafd91 Huang Ying 2022-07-13 1589
33024536bafd91 Huang Ying 2022-07-13 1590 pgdat = NODE_DATA(dst_nid);
c959924b0dc53b Huang Ying 2022-07-13 1591 if (pgdat_free_space_enough(pgdat)) {
c959924b0dc53b Huang Ying 2022-07-13 1592 /* workload changed, reset hot threshold */
c959924b0dc53b Huang Ying 2022-07-13 1593 pgdat->nbp_threshold = 0;
33024536bafd91 Huang Ying 2022-07-13 1594 return true;
c959924b0dc53b Huang Ying 2022-07-13 1595 }
33024536bafd91 Huang Ying 2022-07-13 1596
c959924b0dc53b Huang Ying 2022-07-13 1597 def_th = sysctl_numa_balancing_hot_threshold;
c959924b0dc53b Huang Ying 2022-07-13 1598 rate_limit = sysctl_numa_balancing_promote_rate_limit << \
c959924b0dc53b Huang Ying 2022-07-13 1599 (20 - PAGE_SHIFT);
c959924b0dc53b Huang Ying 2022-07-13 1600 numa_promotion_adjust_threshold(pgdat, rate_limit, def_th);
c959924b0dc53b Huang Ying 2022-07-13 1601
c959924b0dc53b Huang Ying 2022-07-13 1602 th = pgdat->nbp_threshold ? : def_th;
33024536bafd91 Huang Ying 2022-07-13 1603 latency = numa_hint_fault_latency(page);
33024536bafd91 Huang Ying 2022-07-13 1604 if (latency >= th)
33024536bafd91 Huang Ying 2022-07-13 1605 return false;
33024536bafd91 Huang Ying 2022-07-13 1606
c6833e10008f97 Huang Ying 2022-07-13 1607 return !numa_promotion_rate_limit(pgdat, rate_limit,
c6833e10008f97 Huang Ying 2022-07-13 1608 thp_nr_pages(page));
33024536bafd91 Huang Ying 2022-07-13 1609 }
33024536bafd91 Huang Ying 2022-07-13 1610
10f39042711ba2 Rik van Riel 2014-01-27 1611 this_cpupid = cpu_pid_to_cpupid(dst_cpu, current->pid);
37355bdc5a1298 Mel Gorman 2018-10-01 1612 last_cpupid = page_cpupid_xchg_last(page, this_cpupid);
37355bdc5a1298 Mel Gorman 2018-10-01 1613
33024536bafd91 Huang Ying 2022-07-13 1614 if (!(sysctl_numa_balancing_mode & NUMA_BALANCING_MEMORY_TIERING) &&
33024536bafd91 Huang Ying 2022-07-13 1615 !node_is_toptier(src_nid) && !cpupid_valid(last_cpupid))
33024536bafd91 Huang Ying 2022-07-13 1616 return false;
33024536bafd91 Huang Ying 2022-07-13 1617
37355bdc5a1298 Mel Gorman 2018-10-01 1618 /*
37355bdc5a1298 Mel Gorman 2018-10-01 1619 * Allow first faults or private faults to migrate immediately early in
37355bdc5a1298 Mel Gorman 2018-10-01 1620 * the lifetime of a task. The magic number 4 is based on waiting for
37355bdc5a1298 Mel Gorman 2018-10-01 1621 * two full passes of the "multi-stage node selection" test that is
37355bdc5a1298 Mel Gorman 2018-10-01 1622 * executed below.
37355bdc5a1298 Mel Gorman 2018-10-01 1623 */
98fa15f34cb379 Anshuman Khandual 2019-03-05 1624 if ((p->numa_preferred_nid == NUMA_NO_NODE || p->numa_scan_seq <= 4) &&
37355bdc5a1298 Mel Gorman 2018-10-01 1625 (cpupid_pid_unset(last_cpupid) || cpupid_match_pid(p, last_cpupid)))
37355bdc5a1298 Mel Gorman 2018-10-01 1626 return true;
10f39042711ba2 Rik van Riel 2014-01-27 1627
10f39042711ba2 Rik van Riel 2014-01-27 1628 /*
10f39042711ba2 Rik van Riel 2014-01-27 1629 * Multi-stage node selection is used in conjunction with a periodic
10f39042711ba2 Rik van Riel 2014-01-27 1630 * migration fault to build a temporal task<->page relation. By using
10f39042711ba2 Rik van Riel 2014-01-27 1631 * a two-stage filter we remove short/unlikely relations.
10f39042711ba2 Rik van Riel 2014-01-27 1632 *
10f39042711ba2 Rik van Riel 2014-01-27 1633 * Using P(p) ~ n_p / n_t as per frequentist probability, we can equate
10f39042711ba2 Rik van Riel 2014-01-27 1634 * a task's usage of a particular page (n_p) per total usage of this
10f39042711ba2 Rik van Riel 2014-01-27 1635 * page (n_t) (in a given time-span) to a probability.
10f39042711ba2 Rik van Riel 2014-01-27 1636 *
10f39042711ba2 Rik van Riel 2014-01-27 1637 * Our periodic faults will sample this probability and getting the
10f39042711ba2 Rik van Riel 2014-01-27 1638 * same result twice in a row, given these samples are fully
10f39042711ba2 Rik van Riel 2014-01-27 1639 * independent, is then given by P(n)^2, provided our sample period
10f39042711ba2 Rik van Riel 2014-01-27 1640 * is sufficiently short compared to the usage pattern.
10f39042711ba2 Rik van Riel 2014-01-27 1641 *
10f39042711ba2 Rik van Riel 2014-01-27 1642 * This quadric squishes small probabilities, making it less likely we
10f39042711ba2 Rik van Riel 2014-01-27 1643 * act on an unlikely task<->page relation.
10f39042711ba2 Rik van Riel 2014-01-27 1644 */
10f39042711ba2 Rik van Riel 2014-01-27 1645 if (!cpupid_pid_unset(last_cpupid) &&
10f39042711ba2 Rik van Riel 2014-01-27 1646 cpupid_to_nid(last_cpupid) != dst_nid)
10f39042711ba2 Rik van Riel 2014-01-27 1647 return false;
10f39042711ba2 Rik van Riel 2014-01-27 1648
10f39042711ba2 Rik van Riel 2014-01-27 1649 /* Always allow migrate on private faults */
10f39042711ba2 Rik van Riel 2014-01-27 1650 if (cpupid_match_pid(p, last_cpupid))
10f39042711ba2 Rik van Riel 2014-01-27 1651 return true;
10f39042711ba2 Rik van Riel 2014-01-27 1652
10f39042711ba2 Rik van Riel 2014-01-27 1653 /* A shared fault, but p->numa_group has not been set up yet. */
10f39042711ba2 Rik van Riel 2014-01-27 1654 if (!ng)
10f39042711ba2 Rik van Riel 2014-01-27 1655 return true;
10f39042711ba2 Rik van Riel 2014-01-27 1656
10f39042711ba2 Rik van Riel 2014-01-27 1657 /*
4142c3ebb685bb Rik van Riel 2016-01-25 1658 * Destination node is much more heavily used than the source
4142c3ebb685bb Rik van Riel 2016-01-25 1659 * node? Allow migration.
10f39042711ba2 Rik van Riel 2014-01-27 1660 */
4142c3ebb685bb Rik van Riel 2016-01-25 1661 if (group_faults_cpu(ng, dst_nid) > group_faults_cpu(ng, src_nid) *
4142c3ebb685bb Rik van Riel 2016-01-25 1662 ACTIVE_NODE_FRACTION)
10f39042711ba2 Rik van Riel 2014-01-27 1663 return true;
10f39042711ba2 Rik van Riel 2014-01-27 1664
10f39042711ba2 Rik van Riel 2014-01-27 1665 /*
4142c3ebb685bb Rik van Riel 2016-01-25 1666 * Distribute memory according to CPU & memory use on each node,
4142c3ebb685bb Rik van Riel 2016-01-25 1667 * with 3/4 hysteresis to avoid unnecessary memory migrations:
4142c3ebb685bb Rik van Riel 2016-01-25 1668 *
4142c3ebb685bb Rik van Riel 2016-01-25 1669 * faults_cpu(dst) 3 faults_cpu(src)
4142c3ebb685bb Rik van Riel 2016-01-25 1670 * --------------- * - > ---------------
4142c3ebb685bb Rik van Riel 2016-01-25 1671 * faults_mem(dst) 4 faults_mem(src)
10f39042711ba2 Rik van Riel 2014-01-27 1672 */
4142c3ebb685bb Rik van Riel 2016-01-25 1673 return group_faults_cpu(ng, dst_nid) * group_faults(p, src_nid) * 3 >
4142c3ebb685bb Rik van Riel 2016-01-25 1674 group_faults_cpu(ng, src_nid) * group_faults(p, dst_nid) * 4;
10f39042711ba2 Rik van Riel 2014-01-27 1675 }
10f39042711ba2 Rik van Riel 2014-01-27 1676

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