Huang Ying 5c7b1aaf13 sched/numa: Avoid migrating task to CPU-less node ... In a typical memory tiering system, there's no CPU in slow (PMEM) NUMA nodes. But if the number of the hint page faults on a PMEM node is the max for a task, The current NUMA balancing policy may try to place the task on the PMEM node instead of DRAM node. This is unreasonable, because there's no CPU in PMEM NUMA nodes. To fix this, CPU-less nodes are ignored when searching the migration target node for a task in this patch. To test the patch, we run a workload that accesses more memory in PMEM node than memory in DRAM node. Without the patch, the PMEM node will be chosen as preferred node in task_numa_placement(). While the DRAM node will be chosen instead with the patch. Signed-off-by: "Huang, Ying" <ying.huang@intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20220214121553.582248-2-ying.huang@intel.com		2022-02-16 15:57:53 +01:00
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autogroup.c	sched: move autogroup sysctls into its own file	2022-02-02 13:11:37 +01:00
autogroup.h	sched: move autogroup sysctls into its own file	2022-02-02 13:11:37 +01:00
clock.c	sched: Fix various typos	2021-03-22 00:11:52 +01:00
completion.c
core_sched.c	sched/core: Forced idle accounting	2021-11-17 14:49:00 +01:00
core.c	sched/numa: Fix NUMA topology for systems with CPU-less nodes	2022-02-16 15:57:53 +01:00
cpuacct.c	sched/cpuacct: Make user/system times in cpuacct.stat more precise	2021-11-23 09:55:22 +01:00
cpudeadline.c
cpudeadline.h
cpufreq_schedutil.c	sched/uclamp: Fix iowait boost escaping uclamp restriction	2022-01-27 12:57:19 +01:00
cpufreq.c
cpupri.c	sched: Fix various typos	2021-03-22 00:11:52 +01:00
cpupri.h
cputime.c	Peter Zijlstra says:	2022-01-11 17:14:59 -08:00
deadline.c	sched/dl: Support schedstats for deadline sched class	2021-10-05 15:51:53 +02:00
debug.c	sched/debug: Remove mpol_get/put and task_lock/unlock from sched_show_numa	2022-01-27 12:57:18 +01:00
fair.c	sched/numa: Avoid migrating task to CPU-less node	2022-02-16 15:57:53 +01:00
features.h	sched: Disable TTWU_QUEUE on RT	2021-10-05 15:52:12 +02:00
idle.c	sched/idle: Make the idle timer expire in hard interrupt context	2021-09-09 10:36:16 +02:00
isolation.c	sched/isolation: Reconcile rcu_nocbs= and nohz_full=	2021-05-13 14:12:47 +02:00
loadavg.c	sched: Make multiple runqueue task counters 32-bit	2021-05-12 21:34:17 +02:00
Makefile	sched, kcsan: Enable memory barrier instrumentation	2021-12-09 16:42:28 -08:00
membarrier.c	sched/membarrier: fix missing local execution of ipi_sync_rq_state()	2021-03-06 12:40:21 +01:00
pelt.c	sched: Fix various typos	2021-03-22 00:11:52 +01:00
pelt.h	Merge branch 'sched/urgent' into sched/core, to resolve conflicts	2021-06-18 11:31:25 +02:00
psi.c	psi: Fix "defined but not used" warnings when CONFIG_PROC_FS=n	2022-01-27 12:57:19 +01:00
rt.c	sched/rt: Try to restart rt period timer when rt runtime exceeded	2021-12-07 15:14:10 +01:00
sched-pelt.h
sched.h	sched/numa: Fix NUMA topology for systems with CPU-less nodes	2022-02-16 15:57:53 +01:00
smp.h
stats.c	sched: Introduce task block time in schedstats	2021-10-05 15:51:48 +02:00
stats.h	psi: Fix PSI_MEM_FULL state when tasks are in memstall and doing reclaim	2021-11-17 14:49:00 +01:00
stop_task.c	sched: Make struct sched_statistics independent of fair sched class	2021-10-05 15:51:45 +02:00
swait.c
topology.c	sched/numa: Fix NUMA topology for systems with CPU-less nodes	2022-02-16 15:57:53 +01:00
wait_bit.c
wait.c	wait: add wake_up_pollfree()	2021-12-09 10:49:56 -08:00