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| author | Stefan Hajnoczi | 2016-12-01 20:26:40 +0100 |
|---|---|---|
| committer | Stefan Hajnoczi | 2017-01-03 17:38:47 +0100 |
| commit | 721671ade77f4046b45893fbb7864ca84b9504cd (patch) | |
| tree | 46a5e927a01342c5818e6ba99f137a6ad6fbb9f8 /include | |
| parent | HACKING: document #include order (diff) | |
| download | qemu-721671ade77f4046b45893fbb7864ca84b9504cd.tar.gz qemu-721671ade77f4046b45893fbb7864ca84b9504cd.tar.xz qemu-721671ade77f4046b45893fbb7864ca84b9504cd.zip | |
aio: add flag to skip fds to aio_dispatch()
Polling mode will not call ppoll(2)/epoll_wait(2). Therefore we know
there are no fds ready and should avoid looping over fd handlers in
aio_dispatch().
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Message-id: 20161201192652.9509-2-stefanha@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/block/aio.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/include/block/aio.h b/include/block/aio.h index ca551e346f..c1519ec83a 100644 --- a/include/block/aio.h +++ b/include/block/aio.h @@ -295,8 +295,12 @@ bool aio_pending(AioContext *ctx); /* Dispatch any pending callbacks from the GSource attached to the AioContext. * * This is used internally in the implementation of the GSource. + * + * @dispatch_fds: true to process fds, false to skip them + * (can be used as an optimization by callers that know there + * are no fds ready) */ -bool aio_dispatch(AioContext *ctx); +bool aio_dispatch(AioContext *ctx, bool dispatch_fds); /* Progress in completing AIO work to occur. This can issue new pending * aio as a result of executing I/O completion or bh callbacks. |