diff options
Diffstat (limited to 'include/block/aio.h')
| -rw-r--r-- | include/block/aio.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/include/block/aio.h b/include/block/aio.h index 7d9cd0d03f..349143f6d9 100644 --- a/include/block/aio.h +++ b/include/block/aio.h @@ -131,6 +131,12 @@ struct AioContext { int external_disable_cnt; + /* Number of AioHandlers without .io_poll() */ + int poll_disable_cnt; + + /* Maximum polling time in nanoseconds */ + int64_t poll_max_ns; + /* epoll(7) state used when built with CONFIG_EPOLL */ int epollfd; bool epoll_enabled; @@ -481,4 +487,14 @@ static inline bool aio_context_in_iothread(AioContext *ctx) */ void aio_context_setup(AioContext *ctx); +/** + * aio_context_set_poll_params: + * @ctx: the aio context + * @max_ns: how long to busy poll for, in nanoseconds + * + * Poll mode can be disabled by setting poll_max_ns to 0. + */ +void aio_context_set_poll_params(AioContext *ctx, int64_t max_ns, + Error **errp); + #endif |