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* atomics: eliminate mb_read/mb_setPaolo Bonzini2023-06-061-1/+1
| | | | | | | | | | | | | | | qatomic_mb_read and qatomic_mb_set were the very first atomic primitives introduced for QEMU; their semantics are unclear and they provide a false sense of safety. The last use of qatomic_mb_read() has been removed, so delete it. qatomic_mb_set() instead can survive as an optimized qatomic_set()+smp_mb(), similar to Linux's smp_store_mb(), but rename it to qatomic_set_mb() to match the order of the two operations. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* test-aio-multithread: simplify test_multi_co_schedulePaolo Bonzini2023-05-081-6/+12
| | | | | | | | Instead of using qatomic_mb_{read,set} mindlessly, just use a per-coroutine flag that requires no synchronization. Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* test-aio-multithread: do not use mb_read/mb_set for simple flagsPaolo Bonzini2023-05-081-6/+6
| | | | | | | | | The remaining use of mb_read/mb_set is just to force a thread to exit eventually. It does not order two memory accesses and therefore can be just read/set. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* tests: Move unit tests into a separate directoryThomas Huth2021-03-121-0/+460
The main tests directory still looks very crowded, and it's not clear which files are part of a unit tests and which belong to a different test subsystem. Let's clean up the mess and move the unit tests to a separate directory. Message-Id: <20210310063314.1049838-1-thuth@redhat.com> Acked-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Thomas Huth <thuth@redhat.com>