74 lines
2.1 KiB
Diff
74 lines
2.1 KiB
Diff
From 6e057dd5df580f0e525d808f5476ee973280371d Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Hyman=20Huang=28=E9=BB=84=E5=8B=87=29?=
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<huangy81@chinatelecom.cn>
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Date: Sun, 26 Jun 2022 01:38:31 +0800
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Subject: [PATCH 2/3] cpus: Introduce cpu_list_generation_id
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Introduce cpu_list_generation_id to track cpu list generation so
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that cpu hotplug/unplug can be detected during measurement of
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dirty page rate.
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cpu_list_generation_id could be used to detect changes of cpu
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list, which is prepared for dirty page rate measurement.
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Signed-off-by: Hyman Huang(黄勇) <huangy81@chinatelecom.cn>
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Reviewed-by: Peter Xu <peterx@redhat.com>
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Message-Id: <06e1f1362b2501a471dce796abb065b04f320fa5.1656177590.git.huangy81@chinatelecom.cn>
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Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
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---
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cpus-common.c | 8 ++++++++
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include/exec/cpu-common.h | 1 +
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2 files changed, 9 insertions(+)
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diff --git a/cpus-common.c b/cpus-common.c
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index 6e73d3e58d..31c6415f37 100644
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--- a/cpus-common.c
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+++ b/cpus-common.c
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@@ -73,6 +73,12 @@ static int cpu_get_free_index(void)
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}
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CPUTailQ cpus = QTAILQ_HEAD_INITIALIZER(cpus);
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+static unsigned int cpu_list_generation_id;
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+
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+unsigned int cpu_list_generation_id_get(void)
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+{
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+ return cpu_list_generation_id;
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+}
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void cpu_list_add(CPUState *cpu)
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{
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@@ -84,6 +90,7 @@ void cpu_list_add(CPUState *cpu)
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assert(!cpu_index_auto_assigned);
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}
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QTAILQ_INSERT_TAIL_RCU(&cpus, cpu, node);
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+ cpu_list_generation_id++;
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}
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void cpu_list_remove(CPUState *cpu)
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@@ -96,6 +103,7 @@ void cpu_list_remove(CPUState *cpu)
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QTAILQ_REMOVE_RCU(&cpus, cpu, node);
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cpu->cpu_index = UNASSIGNED_CPU_INDEX;
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+ cpu_list_generation_id++;
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}
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CPUState *qemu_get_cpu(int index)
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diff --git a/include/exec/cpu-common.h b/include/exec/cpu-common.h
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index 039d422bf4..cdee668f20 100644
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--- a/include/exec/cpu-common.h
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+++ b/include/exec/cpu-common.h
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@@ -11,6 +11,7 @@
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void qemu_init_cpu_list(void);
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void cpu_list_lock(void);
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void cpu_list_unlock(void);
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+unsigned int cpu_list_generation_id_get(void);
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void tcg_flush_softmmu_tlb(CPUState *cs);
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--
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2.27.0
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