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| author | Emanuele Giuseppe Esposito <eesposit@redhat.com> | 2023-02-03 08:17:28 -0500 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2023-04-25 13:17:28 +0200 |
| commit | ab50533b6946b1adeb8eef62c6b16689abcd1e70 (patch) | |
| tree | f26f82f922d324d83cb181a9c1176833afd562ba /include/sysemu/block-backend-io.h | |
| parent | e95200c1c524403e42e8712c7391a8acd5825656 (diff) | |
| download | focaccia-qemu-ab50533b6946b1adeb8eef62c6b16689abcd1e70.tar.gz focaccia-qemu-ab50533b6946b1adeb8eef62c6b16689abcd1e70.zip | |
linux-aio: use LinuxAioState from the running thread
Remove usage of aio_context_acquire by always submitting asynchronous
AIO to the current thread's LinuxAioState.
In order to prevent mistakes from the caller side, avoid passing LinuxAioState
in laio_io_{plug/unplug} and laio_co_submit, and document the functions
to make clear that they work in the current thread's AioContext.
Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Message-Id: <20230203131731.851116-2-eesposit@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'include/sysemu/block-backend-io.h')
| -rw-r--r-- | include/sysemu/block-backend-io.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/sysemu/block-backend-io.h b/include/sysemu/block-backend-io.h index bb25493ba1..851a44de96 100644 --- a/include/sysemu/block-backend-io.h +++ b/include/sysemu/block-backend-io.h @@ -90,6 +90,11 @@ void blk_iostatus_set_err(BlockBackend *blk, int error); int blk_get_max_iov(BlockBackend *blk); int blk_get_max_hw_iov(BlockBackend *blk); +/* + * blk_io_plug/unplug are thread-local operations. This means that multiple + * IOThreads can simultaneously call plug/unplug, but the caller must ensure + * that each unplug() is called in the same IOThread of the matching plug(). + */ void coroutine_fn blk_co_io_plug(BlockBackend *blk); void co_wrapper blk_io_plug(BlockBackend *blk); |