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[Qemu-devel] [PULL 01/10] icount: fix deadlock when all cpus are sleepin
From: |
Paolo Bonzini |
Subject: |
[Qemu-devel] [PULL 01/10] icount: fix deadlock when all cpus are sleeping |
Date: |
Tue, 30 Oct 2018 20:50:02 +0100 |
From: Clement Deschamps <address@hidden>
When all cpus are sleeping (e.g in WFI), to avoid a deadlock
in the main_loop, wake it up in order to start the warp timer.
Signed-off-by: Clement Deschamps <address@hidden>
Message-Id: <address@hidden>
Signed-off-by: Paolo Bonzini <address@hidden>
---
cpus.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/cpus.c b/cpus.c
index 3978f63..a2b33cc 100644
--- a/cpus.c
+++ b/cpus.c
@@ -1554,6 +1554,14 @@ static void *qemu_tcg_rr_cpu_thread_fn(void *arg)
atomic_mb_set(&cpu->exit_request, 0);
}
+ if (use_icount && all_cpu_threads_idle()) {
+ /*
+ * When all cpus are sleeping (e.g in WFI), to avoid a deadlock
+ * in the main_loop, wake it up in order to start the warp timer.
+ */
+ qemu_notify_event();
+ }
+
qemu_tcg_rr_wait_io_event(cpu ? cpu : first_cpu);
deal_with_unplugged_cpus();
}
--
1.8.3.1
- [Qemu-devel] [PULL 00/10] Misc patches for 2018-10-30, Paolo Bonzini, 2018/10/30
- [Qemu-devel] [PULL 08/10] memory-mapping: skip non-volatile memory regions in GuestPhysBlockList, Paolo Bonzini, 2018/10/30
- [Qemu-devel] [PULL 05/10] target/i386: Clear RF on SYSCALL instruction, Paolo Bonzini, 2018/10/30
- [Qemu-devel] [PULL 04/10] MAINTAINERS: remove or downgrade myself to reviewer from some subsystems, Paolo Bonzini, 2018/10/30
- [Qemu-devel] [PULL 02/10] x86: hv_evmcs CPU flag support, Paolo Bonzini, 2018/10/30
- [Qemu-devel] [PULL 01/10] icount: fix deadlock when all cpus are sleeping,
Paolo Bonzini <=
- [Qemu-devel] [PULL 10/10] lsi53c895a: check message length value is valid, Paolo Bonzini, 2018/10/30
- [Qemu-devel] [PULL 07/10] nvdimm: set non-volatile on the memory region, Paolo Bonzini, 2018/10/30
- [Qemu-devel] [PULL 03/10] i386: clarify that the Q35 machine type implements a P35 chipset, Paolo Bonzini, 2018/10/30
- [Qemu-devel] [PULL 06/10] memory: learn about non-volatile memory region, Paolo Bonzini, 2018/10/30
- [Qemu-devel] [PULL 09/10] scripts/dump-guest-memory: Synchronize with guest_phys_blocks_region_add, Paolo Bonzini, 2018/10/30