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That's all we know. X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001 autolearn=_AUTOLEARN X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Eduardo Habkost , Nikolay Igotti , Igor Mammedov , Paolo Bonzini , =?UTF-8?q?Alex=20Benn=C3=A9e?= , Richard Henderson Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Basing the cpu_index on the number of currently allocated vCPUs fails when vCPUs aren't removed in a LIFO manner. This is especially true when we are allocating a cpu_index for each guest thread in linux-user where there is no ordering constraint on their allocation and de-allocation. [I've dropped the assert which is there to guard against out-of-order removal as this should probably be caught higher up the stack. Maybe we could just ifdef CONFIG_SOFTTMU it?] Signed-off-by: Alex Benn=C3=A9e Cc: Nikolay Igotti Cc: Paolo Bonzini Cc: Igor Mammedov Cc: Eduardo Habkost Acked-by: Igor Mammedow --- cpus-common.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) diff --git a/cpus-common.c b/cpus-common.c index 55d5df89237..5a7d2f6132b 100644 --- a/cpus-common.c +++ b/cpus-common.c @@ -61,13 +61,14 @@ static bool cpu_index_auto_assigned; static int cpu_get_free_index(void) { CPUState *some_cpu; - int cpu_index =3D 0; + int max_cpu_index =3D 0; =20 cpu_index_auto_assigned =3D true; CPU_FOREACH(some_cpu) { - cpu_index++; + max_cpu_index =3D MAX(some_cpu->cpu_index, max_cpu_index); } - return cpu_index; + max_cpu_index++; + return max_cpu_index; } =20 void cpu_list_add(CPUState *cpu) @@ -90,8 +91,6 @@ void cpu_list_remove(CPUState *cpu) return; } =20 - assert(!(cpu_index_auto_assigned && cpu !=3D QTAILQ_LAST(&cpus))); - QTAILQ_REMOVE_RCU(&cpus, cpu, node); cpu->cpu_index =3D UNASSIGNED_CPU_INDEX; } --=20 2.20.1