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cpu: expose qemu_cpu_list_lock for lock-guard use

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Expose qemu_cpu_list_lock globally so that we can use
WITH_QEMU_LOCK_GUARD and QEMU_LOCK_GUARD to simplify a few code paths
now and in future.

Signed-off-by: Jamie Iles <quic_jiles@quicinc.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230427020925.51003-2-quic_jiles@quicinc.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Jamie Iles 2023-04-27 03:09:24 +01:00 • committed by Richard Henderson
parent eb0153efa6
commit 370ed60029
5 changed files with 26 additions and 25 deletions
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26
migration/dirtyrate.c
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@ -150,25 +150,25 @@ int64_t vcpu_calculate_dirtyrate(int64_t calc_time_ms,
retry:
init_time_ms = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
cpu_list_lock();
gen_id = cpu_list_generation_id_get();
records = vcpu_dirty_stat_alloc(stat);
vcpu_dirty_stat_collect(stat, records, true);
cpu_list_unlock();
WITH_QEMU_LOCK_GUARD(&qemu_cpu_list_lock) {
gen_id = cpu_list_generation_id_get();
records = vcpu_dirty_stat_alloc(stat);
vcpu_dirty_stat_collect(stat, records, true);
}
duration = dirty_stat_wait(calc_time_ms, init_time_ms);
global_dirty_log_sync(flag, one_shot);
cpu_list_lock();
if (gen_id != cpu_list_generation_id_get()) {
g_free(records);
g_free(stat->rates);
cpu_list_unlock();
goto retry;
WITH_QEMU_LOCK_GUARD(&qemu_cpu_list_lock) {
if (gen_id != cpu_list_generation_id_get()) {
g_free(records);
g_free(stat->rates);
cpu_list_unlock();
goto retry;
}
vcpu_dirty_stat_collect(stat, records, false);
}
vcpu_dirty_stat_collect(stat, records, false);
cpu_list_unlock();
for (i = 0; i < stat->nvcpu; i++) {
dirtyrate = do_calculate_dirtyrate(records[i], duration);