LoongArch: KVM: Start SW timer only when vcpu is blocking

Browse source

SW timer is enabled when vcpu thread is scheduled out, and it is to wake
up vcpu from blocked queue. If vcpu thread is scheduled out but is not
blocked, such as it is preempted by other threads, it is not necessary
to enable SW timer. Since vcpu thread is still on running queue if it is
preempted and SW timer is only to wake up vcpu on blocking queue, so SW
timer is not useful in this situation.

This patch enables SW timer only when vcpu is scheduled out and is
blocking.

Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

...

This commit is contained in:

Bibo Mao 2024-03-06 09:12:13 +08:00 • committed by Huacai Chen

parent aebd3bd586

commit 8bc15d02d5

1 changed files with 9 additions and 14 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

23

arch/loongarch/kvm/timer.c

View file