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[PULL 27/33] cpus: Introduce cpu_list_generation_id
From: |
Dr. David Alan Gilbert (git) |
Subject: |
[PULL 27/33] cpus: Introduce cpu_list_generation_id |
Date: |
Wed, 22 Jun 2022 19:39:11 +0100 |
From: Hyman Huang(黄勇) <huangy81@chinatelecom.cn>
Introduce cpu_list_generation_id to track cpu list generation so
that cpu hotplug/unplug can be detected during measurement of
dirty page rate.
cpu_list_generation_id could be used to detect changes of cpu
list, which is prepared for dirty page rate measurement.
Signed-off-by: Hyman Huang(黄勇) <huangy81@chinatelecom.cn>
Reviewed-by: Peter Xu <peterx@redhat.com>
Message-Id:
<4d7a5f2c86066839054282b1c224067d89d32fc1.1652931128.git.huangy81@chinatelecom.cn>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
---
cpus-common.c | 8 ++++++++
include/exec/cpu-common.h | 1 +
2 files changed, 9 insertions(+)
diff --git a/cpus-common.c b/cpus-common.c
index db459b41ce..793364dc0e 100644
--- a/cpus-common.c
+++ b/cpus-common.c
@@ -73,6 +73,12 @@ static int cpu_get_free_index(void)
}
CPUTailQ cpus = QTAILQ_HEAD_INITIALIZER(cpus);
+static unsigned int cpu_list_generation_id;
+
+unsigned int cpu_list_generation_id_get(void)
+{
+ return cpu_list_generation_id;
+}
void cpu_list_add(CPUState *cpu)
{
@@ -84,6 +90,7 @@ void cpu_list_add(CPUState *cpu)
assert(!cpu_index_auto_assigned);
}
QTAILQ_INSERT_TAIL_RCU(&cpus, cpu, node);
+ cpu_list_generation_id++;
}
void cpu_list_remove(CPUState *cpu)
@@ -96,6 +103,7 @@ void cpu_list_remove(CPUState *cpu)
QTAILQ_REMOVE_RCU(&cpus, cpu, node);
cpu->cpu_index = UNASSIGNED_CPU_INDEX;
+ cpu_list_generation_id++;
}
CPUState *qemu_get_cpu(int index)
diff --git a/include/exec/cpu-common.h b/include/exec/cpu-common.h
index 5968551a05..2281be4e10 100644
--- a/include/exec/cpu-common.h
+++ b/include/exec/cpu-common.h
@@ -35,6 +35,7 @@ extern intptr_t qemu_host_page_mask;
void qemu_init_cpu_list(void);
void cpu_list_lock(void);
void cpu_list_unlock(void);
+unsigned int cpu_list_generation_id_get(void);
void tcg_flush_softmmu_tlb(CPUState *cs);
--
2.36.1
- [PULL 29/33] softmmu/dirtylimit: Implement vCPU dirtyrate calculation periodically, (continued)
- [PULL 29/33] softmmu/dirtylimit: Implement vCPU dirtyrate calculation periodically, Dr. David Alan Gilbert (git), 2022/06/22
- [PULL 31/33] softmmu/dirtylimit: Implement virtual CPU throttle, Dr. David Alan Gilbert (git), 2022/06/22
- [PULL 33/33] tests: Add dirty page rate limit test, Dr. David Alan Gilbert (git), 2022/06/22
- [PULL 20/33] migration: remove the QEMUFileOps 'set_blocking' callback, Dr. David Alan Gilbert (git), 2022/06/22
- [PULL 26/33] accel/kvm/kvm-all: Refactor per-vcpu dirty ring reaping, Dr. David Alan Gilbert (git), 2022/06/22
- [PULL 32/33] softmmu/dirtylimit: Implement dirty page rate limit, Dr. David Alan Gilbert (git), 2022/06/22
- [PULL 25/33] migration: remove the QEMUFileOps abstraction, Dr. David Alan Gilbert (git), 2022/06/22
- [PULL 21/33] migration: remove the QEMUFileOps 'close' callback, Dr. David Alan Gilbert (git), 2022/06/22
- [PULL 30/33] accel/kvm/kvm-all: Introduce kvm_dirty_ring_size function, Dr. David Alan Gilbert (git), 2022/06/22
- [PULL 28/33] migration/dirtyrate: Refactor dirty page rate calculation, Dr. David Alan Gilbert (git), 2022/06/22
- [PULL 27/33] cpus: Introduce cpu_list_generation_id,
Dr. David Alan Gilbert (git) <=
- Re: [PULL 00/33] migration queue, Dr. David Alan Gilbert, 2022/06/23
- [PULL 00/33] migration queue, Dr. David Alan Gilbert (git), 2022/06/23
- [PULL 01/33] migration: Remove RDMA_UNREGISTRATION_EXAMPLE, Dr. David Alan Gilbert (git), 2022/06/23
- [PULL 02/33] QIOChannelSocket: Introduce assert and reduce ifdefs to improve readability, Dr. David Alan Gilbert (git), 2022/06/23
- [PULL 03/33] QIOChannelSocket: Fix zero-copy send so socket flush works, Dr. David Alan Gilbert (git), 2022/06/23
- [PULL 05/33] io: add a QIOChannelNull equivalent to /dev/null, Dr. David Alan Gilbert (git), 2022/06/23
- [PULL 06/33] migration: switch to use QIOChannelNull for dummy channel, Dr. David Alan Gilbert (git), 2022/06/23
- [PULL 08/33] migration: rename rate limiting fields in QEMUFile, Dr. David Alan Gilbert (git), 2022/06/23
- [PULL 07/33] migration: remove unreachble RDMA code in save_hook impl, Dr. David Alan Gilbert (git), 2022/06/23
- [PULL 10/33] migration: rename qemu_ftell to qemu_file_total_transferred, Dr. David Alan Gilbert (git), 2022/06/23