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David Alan Gilbert" , Eric Blake , Markus Armbruster Cc: Zhang Chen Subject: [PATCH V2 2/4] iothread: Introduce a new flag to show iothreads attached status Date: Wed, 21 Jan 2026 14:41:08 +0800 Message-ID: <20260121064110.28760-2-zhangckid@gmail.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20260121064110.28760-1-zhangckid@gmail.com> References: <20260121064110.28760-1-zhangckid@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2607:f8b0:4864:20::435; envelope-from=zhangckid@gmail.com; helo=mail-pf1-x435.google.com 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, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org QEMU Need a flag to show current iothread attached status when hotplug multi iothreads. For example virtio-blk. Signed-off-by: Zhang Chen --- include/system/iothread.h | 1 + iothread.c | 5 +++++ 2 files changed, 6 insertions(+) diff --git a/include/system/iothread.h b/include/system/iothread.h index e26d13c6c7..3d00474523 100644 --- a/include/system/iothread.h +++ b/include/system/iothread.h @@ -32,6 +32,7 @@ struct IOThread { QemuSemaphore init_done_sem; /* is thread init done? */ bool stopping; /* has iothread_stop() been called? */ bool running; /* should iothread_run() continue? */ + bool attached; /* Whether or not attached to device */ int thread_id; /* AioContext poll parameters */ diff --git a/iothread.c b/iothread.c index caf68e0764..38e38fb44d 100644 --- a/iothread.c +++ b/iothread.c @@ -94,6 +94,7 @@ void iothread_stop(IOThread *iothread) return; } iothread->stopping = true; + iothread->attached = false; aio_bh_schedule_oneshot(iothread->ctx, iothread_stop_bh, iothread); qemu_thread_join(&iothread->thread); } @@ -199,6 +200,9 @@ static void iothread_init(EventLoopBase *base, Error **errp) */ iothread_init_gcontext(iothread, thread_name); + /* Clear iothread attached flag for init gcontext */ + iothread->attached = false; + iothread_set_aio_context_params(base, &local_error); if (local_error) { error_propagate(errp, local_error); @@ -336,6 +340,7 @@ char *iothread_get_id(IOThread *iothread) AioContext *iothread_get_aio_context(IOThread *iothread) { + iothread->attached = true; return iothread->ctx; } -- 2.49.0