Re: [PATCH 11/19] accel/tcg: Fixed tsan warnings related to parallel_cpus

[Emilio G. Cota]

On Fri, May 22, 2020 at 12:07:47 -0400, Robert Foley wrote:
> Fixed several tsan warnings. e.g.
> 
> WARNING: ThreadSanitizer: data race (pid=35425)
>   Read of size 1 at 0x557cd83aee28 by thread T7:
>     #0 curr_cflags include/exec/exec-all.h:460:13 
> (qemu-system-aarch64+0x4b7f27)
>     #1 cpu_exec accel/tcg/cpu-exec.c:730:26 (qemu-system-aarch64+0x4b7f27)
>     #2 tcg_cpu_exec cpus.c:1415:11 (qemu-system-aarch64+0x45b9b6)
>     #3 qemu_tcg_cpu_thread_fn cpus.c:1723:17 (qemu-system-aarch64+0x45b9b6)
>     #4 qemu_thread_start util/qemu-thread-posix.c:519:9 
> (qemu-system-aarch64+0xd431e0)
> 
>   Previous write of size 1 at 0x557cd83aee28 by thread T6:
>     #0 cpu_exec_step_atomic accel/tcg/cpu-exec.c:254:23 
> (qemu-system-aarch64+0x4b6caa)
>     #1 qemu_tcg_cpu_thread_fn cpus.c:1741:17 (qemu-system-aarch64+0x45baca)
>     #2 qemu_thread_start util/qemu-thread-posix.c:519:9 
> (qemu-system-aarch64+0xd431e0)
> 
>   Location is global 'parallel_cpus' of size 1 at 0x557cd83aee28 
> (qemu-system-aarch64+0x000001fb3e28)
> 
> Cc: Richard Henderson <address@hidden>
> Cc: Paolo Bonzini <address@hidden>
> Signed-off-by: Robert Foley <address@hidden>

Reviewed-by: Emilio G. Cota <address@hidden>

                E.