diff mbox series

[v2,01/17] xen/cpupool: add cpu to sched_res_mask when removing it from cpupool

Message ID 20201201082128.15239-2-jgross@suse.com (mailing list archive)
State Superseded
Headers show
Series xen: support per-cpupool scheduling granularity | expand

Commit Message

Jürgen Groß Dec. 1, 2020, 8:21 a.m. UTC 
When a cpu is removed from a cpupool and added to the free cpus it
should be added to sched_res_mask, too.

The related removal from sched_res_mask in case of core scheduling
is already done in schedule_cpu_add().

As long as all cpupools share the same scheduling granularity there
is nothing going wrong with the missing addition, but this will change
when per-cpupool granularity is fully supported.

Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Dario Faggioli <dfaggioli@suse.com>
---
 xen/common/sched/core.c | 1 +
 1 file changed, 1 insertion(+)
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Patch

diff --git a/xen/common/sched/core.c b/xen/common/sched/core.c
index ed973e90ec..f8c81592af 100644
--- a/xen/common/sched/core.c
+++ b/xen/common/sched/core.c
@@ -3189,6 +3189,7 @@  int schedule_cpu_rm(unsigned int cpu)
             /* Adjust cpu masks of resources (old and new). */
             cpumask_clear_cpu(cpu_iter, sr->cpus);
             cpumask_set_cpu(cpu_iter, sr_new[idx]->cpus);
+            cpumask_set_cpu(cpu_iter, &sched_res_mask);
 
             /* Init timer. */
             init_timer(&sr_new[idx]->s_timer, s_timer_fn, NULL, cpu_iter);