oslib-posix: take lock before qemu_cond_broadcast
In touch_all_pages, if the mutex is not taken around qemu_cond_broadcast, qemu_cond_broadcast may be called before all touch page threads enter qemu_cond_wait. In this case, the touch page threads wait forever for the main thread to wake them up, causing a deadlock. Signed-off-by: Bauerchen <bauerchen@tencent.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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@ -492,8 +492,11 @@ static bool touch_all_pages(char *area, size_t hpagesize, size_t numpages,
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QEMU_THREAD_JOINABLE);
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QEMU_THREAD_JOINABLE);
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addr += memset_thread[i].numpages * hpagesize;
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addr += memset_thread[i].numpages * hpagesize;
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}
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}
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qemu_mutex_lock(&page_mutex);
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threads_created_flag = true;
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threads_created_flag = true;
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qemu_cond_broadcast(&page_cond);
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qemu_cond_broadcast(&page_cond);
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qemu_mutex_unlock(&page_mutex);
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for (i = 0; i < memset_num_threads; i++) {
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for (i = 0; i < memset_num_threads; i++) {
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qemu_thread_join(&memset_thread[i].pgthread);
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qemu_thread_join(&memset_thread[i].pgthread);
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