diff options
Diffstat (limited to 'include/block/aio.h')
| -rw-r--r-- | include/block/aio.h | 29 |
1 files changed, 10 insertions, 19 deletions
diff --git a/include/block/aio.h b/include/block/aio.h index cb1989105a..62ed954344 100644 --- a/include/block/aio.h +++ b/include/block/aio.h @@ -133,12 +133,16 @@ struct AioContext { AioHandlerList deleted_aio_handlers; /* Used to avoid unnecessary event_notifier_set calls in aio_notify; - * accessed with atomic primitives. If this field is 0, everything - * (file descriptors, bottom halves, timers) will be re-evaluated - * before the next blocking poll(), thus the event_notifier_set call - * can be skipped. If it is non-zero, you may need to wake up a - * concurrent aio_poll or the glib main event loop, making - * event_notifier_set necessary. + * only written from the AioContext home thread, or under the BQL in + * the case of the main AioContext. However, it is read from any + * thread so it is still accessed with atomic primitives. + * + * If this field is 0, everything (file descriptors, bottom halves, + * timers) will be re-evaluated before the next blocking poll() or + * io_uring wait; therefore, the event_notifier_set call can be + * skipped. If it is non-zero, you may need to wake up a concurrent + * aio_poll or the glib main event loop, making event_notifier_set + * necessary. * * Bit 0 is reserved for GSource usage of the AioContext, and is 1 * between a call to aio_ctx_prepare and the next call to aio_ctx_check. @@ -682,19 +686,6 @@ void aio_co_enter(AioContext *ctx, struct Coroutine *co); AioContext *qemu_get_current_aio_context(void); /** - * in_aio_context_home_thread: - * @ctx: the aio context - * - * Return whether we are running in the thread that normally runs @ctx. Note - * that acquiring/releasing ctx does not affect the outcome, each AioContext - * still only has one home thread that is responsible for running it. - */ -static inline bool in_aio_context_home_thread(AioContext *ctx) -{ - return ctx == qemu_get_current_aio_context(); -} - -/** * aio_context_setup: * @ctx: the aio context * |